Built 2026-10-14 (14 October 2026)

Tromso Weather Records (NO000001026)

Record envelope, standing records and threshold days for Tromso (NO000001026), Norway, with 107 years of record.

Key Facts for Tromso

  • Tromso (NO000001026) is a weather station in Norway at 69.65 latitude and 18.93 longitude, 100 m (328 ft) above sea level.
  • The station reports from 1920 to 2026, 107 years of record.
  • 1,464 records set at Tromso still stand.
  • Records are tracked for tmax, tmin, prcp, snwd: an element needs 30 years of data to be eligible.
  • Tromso set a daily record high minimum temperature of 9.9 C (49.8 F) on 28 September 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: Norway, 69.65 latitude, 18.93 longitude.
  • Elevation: 100 m (328 ft).
  • Period of record: 1920 to 2026, 107 years.
  • Eligible elements: tmax, tmin, prcp, snwd.

Daily Record Envelope and 2026

11 days at or beyond a record
Daily record high and record low at Tromso, with 2026 drawn through them The band shows the record high and record low for each calendar day at Tromso. The lines show the 2026 daily maximum and minimum. 11 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -20-10010203040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Tromso. The lines show the 2026 daily maximum and minimum. 11 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Tromso, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan8.4 C (47.1 F)-18.3 C (-0.9 F)3.6 C (38.5 F)-14.8 C (5.4 F)
Feb8.5 C (47.3 F)-18.4 C (-1.1 F)3.5 C (38.3 F)-11.1 C (12.0 F)
Mar9.7 C (49.5 F)-17.0 C (1.4 F)8.3 C (46.9 F)-4.9 C (23.2 F)
Apr17.0 C (62.6 F)-14.3 C (6.3 F)13.4 C (56.1 F)-3.7 C (25.3 F)
May26.6 C (79.9 F)-6.6 C (20.1 F)18.6 C (65.5 F)-1.8 C (28.8 F)
Jun29.9 C (85.8 F)-2.5 C (27.5 F)25.3 C (77.5 F)4.5 C (40.1 F)
Jul30.2 C (86.4 F)0.7 C (33.3 F)22.5 C (72.5 F)4.7 C (40.5 F)
Aug28.4 C (83.1 F)1.1 C (34.0 F)20.1 C (68.2 F)5.3 C (41.5 F)
Sep23.4 C (74.1 F)-4.3 C (24.3 F)15.4 C (59.7 F)2.2 C (36.0 F)
Oct18.6 C (65.5 F)-9.6 C (14.7 F)12.6 C (54.7 F)3.9 C (39.0 F)
Nov11.9 C (53.4 F)-14.2 C (6.4 F)n/an/a
Dec9.7 C (49.5 F)-16.8 C (1.8 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Tromso by the year they were set 1,464 records at Tromso still stand. 1966 holds the most, with 37. 0102030401920: 31921: 21922: 41923: 51924: 61925: 131926: 221927: 81928: 151929: 181930: 171931: 81932: 81933: 81934: 121935: 161936: 101937: 241938: 171939: 111940: 51941: 311942: 181943: 61944: 91945: 81946: 121947: 91948: 191949: 141950: 41951: 161952: 41953: 251954: 21955: 161956: 61957: 71958: 41959: 231960: 151961: 81962: 91963: 81964: 81965: 231966: 371967: 91968: 301969: 71970: 131971: 171972: 191973: 131974: 111975: 191976: 161977: 251978: 241979: 151980: 211981: 201982: 151983: 111984: 181985: 101986: 231987: 261988: 81989: 161990: 81991: 41992: 201993: 131994: 71995: 101996: 81997: 131998: 161999: 112000: 62001: 72002: 72003: 192004: 152005: 162006: 192007: 262008: 72009: 32010: 172011: 152012: 92013: 182014: 62015: 72016: 192017: 112018: 232019: 122020: 32021: 142022: 212023: 182024: 322025: 272026: 181920193119421953196419751986199720082019
1,464 records at Tromso still stand. 1966 holds the most, with 37.
Standing records at Tromso by the year they were set
Year setStanding records
19203
19212
19224
19235
19246
192513
192622
19278
192815
192918
193017
19318
19328
19338
193412
193516
193610
193724
193817
193911
19405
194131
194218
19436
19449
19458
194612
19479
194819
194914
19504
195116
19524
195325
19542
195516
19566
19577
19584
195923
196015
19618
19629
19638
19648
196523
196637
19679
196830
19697
197013
197117
197219
197313
197411
197519
197616
197725
197824
197915
198021
198120
198215
198311
198418
198510
198623
198726
19888
198916
19908
19914
199220
199313
19947
199510
19968
199713
199816
199911
20006
20017
20027
200319
200415
200516
200619
200726
20087
20093
201017
201115
20129
201318
20146
20157
201619
201711
201823
201912
20203
202114
202221
202318
202432
202527
202618

All-Time Record Progression

29 new records
When Tromso set new all-time records 29 all-time records were set at Tromso between 20 April 1953 and 30 July 2018. Each dot is a new record. Record snow depthRecord high maximum temperatureRecord low minimum temperatureRecord high minimum temperatureRecord daily precipitationRecord low maximum temperature20 April 1953: Record snow depth 150.0 cm (59.1 in)29 July 1957: Record high maximum temperature 28.5 C (83.3 F)9 January 1958: Record low minimum temperature -15.8 C (3.6 F)8 July 1960: Record high minimum temperature 20.5 C (68.9 F)22 February 1961: Record daily precipitation 48.9 mm (1.9 in)26 March 1962: Record snow depth 155.0 cm (61.0 in)3 October 1964: Record daily precipitation 63.5 mm (2.5 in)11 March 1965: Record snow depth 157.0 cm (61.8 in)15 March 1965: Record snow depth 165.0 cm (65.0 in)16 March 1965: Record snow depth 168.0 cm (66.1 in)31 March 1965: Record snow depth 170.0 cm (66.9 in)1 April 1965: Record snow depth 175.0 cm (68.9 in)2 April 1965: Record snow depth 190.0 cm (74.8 in)2 February 1966: Record low maximum temperature -14.2 C (6.4 F)2 February 1966: Record low minimum temperature -18.1 C (-0.6 F)3 February 1966: Record low maximum temperature -14.6 C (5.7 F)3 February 1966: Record low minimum temperature -18.4 C (-1.1 F)25 June 1970: Record high maximum temperature 28.7 C (83.7 F)1 July 1972: Record high maximum temperature 30.2 C (86.4 F)1 February 1981: Record snow depth 192.0 cm (75.6 in)4 March 1997: Record snow depth 194.0 cm (76.4 in)5 March 1997: Record snow depth 198.0 cm (78.0 in)17 April 1997: Record snow depth 204.0 cm (80.3 in)18 April 1997: Record snow depth 218.0 cm (85.8 in)19 April 1997: Record snow depth 230.0 cm (90.6 in)28 April 1997: Record snow depth 234.0 cm (92.1 in)29 April 1997: Record snow depth 240.0 cm (94.5 in)6 February 2012: Record low maximum temperature -15.2 C (4.6 F)30 July 2018: Record high minimum temperature 20.8 C (69.4 F)196019701980199020002010
29 all-time records were set at Tromso between 20 April 1953 and 30 July 2018. Each dot is a new record.
When Tromso set new all-time records
DateKindDetail
1953-04-20Record snow depthRecord snow depth 150.0 cm (59.1 in)
1957-07-29Record high maximum temperatureRecord high maximum temperature 28.5 C (83.3 F)
1958-01-09Record low minimum temperatureRecord low minimum temperature -15.8 C (3.6 F)
1960-07-08Record high minimum temperatureRecord high minimum temperature 20.5 C (68.9 F)
1961-02-22Record daily precipitationRecord daily precipitation 48.9 mm (1.9 in)
1962-03-26Record snow depthRecord snow depth 155.0 cm (61.0 in)
1964-10-03Record daily precipitationRecord daily precipitation 63.5 mm (2.5 in)
1965-03-11Record snow depthRecord snow depth 157.0 cm (61.8 in)
1965-03-15Record snow depthRecord snow depth 165.0 cm (65.0 in)
1965-03-16Record snow depthRecord snow depth 168.0 cm (66.1 in)
1965-03-31Record snow depthRecord snow depth 170.0 cm (66.9 in)
1965-04-01Record snow depthRecord snow depth 175.0 cm (68.9 in)
1965-04-02Record snow depthRecord snow depth 190.0 cm (74.8 in)
1966-02-02Record low maximum temperatureRecord low maximum temperature -14.2 C (6.4 F)
1966-02-02Record low minimum temperatureRecord low minimum temperature -18.1 C (-0.6 F)
1966-02-03Record low maximum temperatureRecord low maximum temperature -14.6 C (5.7 F)
1966-02-03Record low minimum temperatureRecord low minimum temperature -18.4 C (-1.1 F)
1970-06-25Record high maximum temperatureRecord high maximum temperature 28.7 C (83.7 F)
1972-07-01Record high maximum temperatureRecord high maximum temperature 30.2 C (86.4 F)
1981-02-01Record snow depthRecord snow depth 192.0 cm (75.6 in)
1997-03-04Record snow depthRecord snow depth 194.0 cm (76.4 in)
1997-03-05Record snow depthRecord snow depth 198.0 cm (78.0 in)
1997-04-17Record snow depthRecord snow depth 204.0 cm (80.3 in)
1997-04-18Record snow depthRecord snow depth 218.0 cm (85.8 in)
1997-04-19Record snow depthRecord snow depth 230.0 cm (90.6 in)
1997-04-28Record snow depthRecord snow depth 234.0 cm (92.1 in)
1997-04-29Record snow depthRecord snow depth 240.0 cm (94.5 in)
2012-02-06Record low maximum temperatureRecord low maximum temperature -15.2 C (4.6 F)
2018-07-30Record high minimum temperatureRecord high minimum temperature 20.8 C (69.4 F)

Wettest Day of Each Month

Oct: 63.5 mm (2.5 in)
Record daily precipitation for each month at Tromso The wettest day on record for each calendar month at Tromso. The most was 63.5 mm (2.5 in) on 3 October 1964. 020406080 Jan: 45.5 mm (1.8 in), 20 January 1925 Jan Feb: 48.9 mm (1.9 in), 22 February 1961 Feb Mar: 41.3 mm (1.6 in), 29 March 2000 Mar Apr: 35.4 mm (1.4 in), 15 April 1962 Apr May: 42.6 mm (1.7 in), 2 May 1990 May Jun: 27.0 mm (1.1 in), 13 June 1961 Jun Jul: 50.0 mm (2.0 in), 2 July 2013 Jul Aug: 46.5 mm (1.8 in), 31 August 1928 Aug Sep: 47.0 mm (1.9 in), 3 September 1924 Sep Oct: 63.5 mm (2.5 in), 3 October 1964 Oct Nov: 49.5 mm (1.9 in), 8 November 1975 Nov Dec: 42.0 mm (1.7 in), 11 December 1935 Dec
The wettest day on record for each calendar month at Tromso. The most was 63.5 mm (2.5 in) on 3 October 1964.
Record daily precipitation for each month at Tromso
MonthRecord daily precipitation (mm)Date
Jan45.5 mm (1.8 in)20 January 1925
Feb48.9 mm (1.9 in)22 February 1961
Mar41.3 mm (1.6 in)29 March 2000
Apr35.4 mm (1.4 in)15 April 1962
May42.6 mm (1.7 in)2 May 1990
Jun27.0 mm (1.1 in)13 June 1961
Jul50.0 mm (2.0 in)2 July 2013
Aug46.5 mm (1.8 in)31 August 1928
Sep47.0 mm (1.9 in)3 September 1924
Oct63.5 mm (2.5 in)3 October 1964
Nov49.5 mm (1.9 in)8 November 1975
Dec42.0 mm (1.7 in)11 December 1935

Period of Record Coverage

1924 to 2026
Days with data per year at Tromso 103 years of record at Tromso, 1924 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1924, 2026. 1924: 118 of 366 days1925: 360 of 365 days1926: 359 of 365 days1927: 360 of 365 days1928: 360 of 366 days1929: 357 of 365 days1930: 361 of 365 days1931: 358 of 365 days1932: 362 of 366 days1933: 359 of 365 days1934: 359 of 365 days1935: 358 of 365 days1936: 359 of 366 days1937: 365 of 365 days1938: 365 of 365 days1939: 365 of 365 days1940: 366 of 366 days1941: 365 of 365 days1942: 365 of 365 days1943: 365 of 365 days1944: 366 of 366 days1945: 365 of 365 days1946: 365 of 365 days1947: 365 of 365 days1948: 366 of 366 days1949: 365 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 366 of 366 days1957: 365 of 365 days1958: 365 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 365 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 365 of 365 days1986: 365 of 365 days1987: 365 of 365 days1988: 366 of 366 days1989: 365 of 365 days1990: 365 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 365 of 365 days1994: 365 of 365 days1995: 365 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 364 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 365 of 365 days2015: 365 of 365 days2016: 366 of 366 days2017: 365 of 365 days2018: 365 of 365 days2019: 365 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 366 of 366 days2025: 365 of 365 days2026: 280 of 365 days1935195019651980199520102025
103 years of record at Tromso, 1924 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1924, 2026.
Days with data per year at Tromso
YearDays with dataShare of yearComplete
192411832%No
192536099%Yes
192635998%Yes
192736099%Yes
192836098%Yes
192935798%Yes
193036199%Yes
193135898%Yes
193236299%Yes
193335998%Yes
193435998%Yes
193535898%Yes
193635998%Yes
1937365100%Yes
1938365100%Yes
1939365100%Yes
1940366100%Yes
1941365100%Yes
1942365100%Yes
1943365100%Yes
1944366100%Yes
1945365100%Yes
1946365100%Yes
1947365100%Yes
1948366100%Yes
1949365100%Yes
1950365100%Yes
1951365100%Yes
1952366100%Yes
1953365100%Yes
1954365100%Yes
1955365100%Yes
1956366100%Yes
1957365100%Yes
1958365100%Yes
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
1982365100%Yes
1983365100%Yes
1984366100%Yes
1985365100%Yes
1986365100%Yes
1987365100%Yes
1988366100%Yes
1989365100%Yes
1990365100%Yes
1991365100%Yes
1992366100%Yes
1993365100%Yes
1994365100%Yes
1995365100%Yes
1996366100%Yes
1997365100%Yes
1998365100%Yes
1999365100%Yes
2000366100%Yes
2001365100%Yes
2002365100%Yes
2003365100%Yes
2004366100%Yes
2005365100%Yes
2006365100%Yes
2007364100%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
2016366100%Yes
2017365100%Yes
2018365100%Yes
2019365100%Yes
2020366100%Yes
2021365100%Yes
2022365100%Yes
2023365100%Yes
2024366100%Yes
2025365100%Yes
202628077%No

Latest Records

20
Latest records at Tromso
DateStationRecordValueBeat old record byOld record stoodSignificance
28 September 2026Tromso, NOdaily high min (Provisional)9.9 C (49.8 F)0.5 C (0.9 F)4 years12 of 100 (Routine)
17 September 2026Tromso, NOdaily rain (Provisional)24.3 mm (1.0 in)4.5 mm (0.18 in)25 years20 of 100 (Routine)
30 August 2026Tromso, NOdaily high min (Tie, Provisional)13.2 C (55.8 F)tie20 years4 of 100 (Routine)
10 June 2026Tromso, NOdaily high min12.2 C (54.0 F)0.4 C (0.7 F)4 years12 of 100 (Routine)
8 June 2026Tromso, NOdaily high min12.3 C (54.1 F)1.3 C (2.3 F)53 years30 of 100 (Routine)
6 June 2026Tromso, NOdaily high min14.8 C (58.6 F)1.9 C (3.4 F)12 years19 of 100 (Routine)
5 June 2026Tromso, NOdaily high min13.2 C (55.8 F)0.4 C (0.7 F)40 years23 of 100 (Routine)
4 June 2026Tromso, NOdaily high max23.4 C (74.1 F)0.1 C (0.2 F)12 years13 of 100 (Routine)
20 May 2026Tromso, NOdaily high max18.6 C (65.5 F)0.6 C (1.1 F)49 years25 of 100 (Routine)
19 April 2026Tromso, NOdaily high max13.4 C (56.1 F)1.0 C (1.8 F)21 years19 of 100 (Routine)
15 April 2026Tromso, NOdaily high max12.1 C (53.8 F)1.7 C (3.1 F)36 years26 of 100 (Routine)
13 April 2026Tromso, NOdaily high max11.7 C (53.1 F)0.3 C (0.5 F)8 years12 of 100 (Routine)
12 April 2026Tromso, NOdaily high max10.5 C (50.9 F)0.6 C (1.1 F)16 years16 of 100 (Routine)
11 April 2026Tromso, NOdaily high max11.8 C (53.2 F)2.3 C (4.1 F)16 years22 of 100 (Routine)
10 April 2026Tromso, NOdaily high max10.6 C (51.1 F)1.8 C (3.2 F)23 years21 of 100 (Routine)
10 April 2026Tromso, NOdaily high min3.6 C (38.5 F)0.2 C (0.4 F)1 year10 of 100 (Routine)
9 April 2026Tromso, NOdaily high max9.8 C (49.6 F)1.7 C (3.1 F)59 years32 of 100 (Routine)
9 April 2026Tromso, NOdaily high min5.1 C (41.2 F)1.6 C (2.9 F)35 years24 of 100 (Routine)
20 March 2026Tromso, NOdaily rain19.2 mm (0.8 in)4.2 mm (0.17 in)25 years20 of 100 (Routine)
18 March 2026Tromso, NOdaily high max8.3 C (46.9 F)1.8 C (3.2 F)53 years31 of 100 (Routine)

Climate Trend

101 complete years, 1925 to 2025
Annual mean temperature at Tromso as warming stripes, 1925 to 2025 One stripe for each of 101 complete years at Tromso, 1925 to 2025. Blue stripes are years cooler than the station's own mean of 3.0 C (37.5 F); red stripes are warmer. The coolest year was 1955, at 1.1 C (34.0 F), and the warmest was 2024, at 5.0 C (40.9 F). The strongest colour marks a difference of 2.0 C (3.6 F). 1925: 2.9 C, -0.1 C from the station mean1926: 2.2 C, -0.9 C from the station mean1927: 2.4 C, -0.7 C from the station mean1928: 2.9 C, -0.1 C from the station mean1929: 2.7 C, -0.4 C from the station mean1930: 3.8 C, +0.8 C from the station mean1931: 2.7 C, -0.3 C from the station mean1932: 2.8 C, -0.2 C from the station mean1933: 3.1 C, +0.1 C from the station mean1934: 4.4 C, +1.3 C from the station mean1935: 3.1 C, 0.0 C from the station mean1936: 3.3 C, +0.2 C from the station mean1937: 4.1 C, +1.1 C from the station mean1938: 4.7 C, +1.7 C from the station mean1939: 2.7 C, -0.4 C from the station mean1940: 2.2 C, -0.8 C from the station mean1941: 1.5 C, -1.5 C from the station mean1942: 1.8 C, -1.2 C from the station mean1943: 3.1 C, +0.1 C from the station mean1944: 3.4 C, +0.4 C from the station mean1945: 2.7 C, -0.4 C from the station mean1946: 3.5 C, +0.4 C from the station mean1947: 2.4 C, -0.7 C from the station mean1948: 3.2 C, +0.2 C from the station mean1949: 3.0 C, 0.0 C from the station mean1950: 3.6 C, +0.6 C from the station mean1951: 2.4 C, -0.7 C from the station mean1952: 2.1 C, -0.9 C from the station mean1953: 3.9 C, +0.9 C from the station mean1954: 3.4 C, +0.3 C from the station mean1955: 1.1 C, -1.9 C from the station mean1956: 2.2 C, -0.9 C from the station mean1957: 2.7 C, -0.3 C from the station mean1958: 2.3 C, -0.8 C from the station mean1959: 3.4 C, +0.4 C from the station mean1960: 3.2 C, +0.1 C from the station mean1961: 3.4 C, +0.3 C from the station mean1962: 1.8 C, -1.3 C from the station mean1963: 2.9 C, -0.2 C from the station mean1964: 3.3 C, +0.3 C from the station mean1965: 1.7 C, -1.4 C from the station mean1966: 1.3 C, -1.7 C from the station mean1967: 2.8 C, -0.3 C from the station mean1968: 1.4 C, -1.6 C from the station mean1969: 2.8 C, -0.2 C from the station mean1970: 2.6 C, -0.5 C from the station mean1971: 1.9 C, -1.1 C from the station mean1972: 4.0 C, +1.0 C from the station mean1973: 2.4 C, -0.6 C from the station mean1974: 3.8 C, +0.8 C from the station mean1975: 2.6 C, -0.5 C from the station mean1976: 2.2 C, -0.8 C from the station mean1977: 2.0 C, -1.0 C from the station mean1978: 1.8 C, -1.2 C from the station mean1979: 2.6 C, -0.4 C from the station mean1980: 2.9 C, -0.2 C from the station mean1981: 1.4 C, -1.6 C from the station mean1982: 2.3 C, -0.7 C from the station mean1983: 2.6 C, -0.4 C from the station mean1984: 3.5 C, +0.4 C from the station mean1985: 2.2 C, -0.8 C from the station mean1986: 2.8 C, -0.3 C from the station mean1987: 2.0 C, -1.0 C from the station mean1988: 2.3 C, -0.8 C from the station mean1989: 3.6 C, +0.5 C from the station mean1990: 4.1 C, +1.1 C from the station mean1991: 3.5 C, +0.5 C from the station mean1992: 3.3 C, +0.2 C from the station mean1993: 3.1 C, +0.1 C from the station mean1994: 2.9 C, -0.1 C from the station mean1995: 2.4 C, -0.6 C from the station mean1996: 2.7 C, -0.3 C from the station mean1997: 2.9 C, -0.2 C from the station mean1998: 2.7 C, -0.3 C from the station mean1999: 3.1 C, 0.0 C from the station mean2000: 3.3 C, +0.3 C from the station mean2001: 2.8 C, -0.3 C from the station mean2002: 3.3 C, +0.3 C from the station mean2003: 3.8 C, +0.8 C from the station mean2004: 4.1 C, +1.0 C from the station mean2005: 4.1 C, +1.0 C from the station mean2006: 4.1 C, +1.0 C from the station mean2007: 4.1 C, +1.0 C from the station mean2008: 3.3 C, +0.3 C from the station mean2009: 3.4 C, +0.3 C from the station mean2010: 2.6 C, -0.5 C from the station mean2011: 4.7 C, +1.6 C from the station mean2012: 2.9 C, -0.1 C from the station mean2013: 4.2 C, +1.1 C from the station mean2014: 3.9 C, +0.8 C from the station mean2015: 4.4 C, +1.3 C from the station mean2016: 4.3 C, +1.3 C from the station mean2017: 3.6 C, +0.6 C from the station mean2018: 4.0 C, +0.9 C from the station mean2019: 3.1 C, 0.0 C from the station mean2020: 4.2 C, +1.2 C from the station mean2021: 3.3 C, +0.3 C from the station mean2022: 4.1 C, +1.0 C from the station mean2023: 3.8 C, +0.7 C from the station mean2024: 5.0 C, +1.9 C from the station mean2025: 4.7 C, +1.7 C from the station mean19251930194019501960197019801990200020102020
One stripe for each of 101 complete years at Tromso, 1925 to 2025. Blue stripes are years cooler than the station's own mean of 3.0 C (37.5 F); red stripes are warmer. The coolest year was 1955, at 1.1 C (34.0 F), and the warmest was 2024, at 5.0 C (40.9 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Tromso as warming stripes, 1925 to 2025
YearAnnual mean temperatureDifference from the station mean
19252.9 C-0.15 C
19262.2 C-0.87 C
19272.4 C-0.68 C
19282.9 C-0.15 C
19292.7 C-0.39 C
19303.8 C+0.79 C
19312.7 C-0.31 C
19322.8 C-0.23 C
19333.1 C+0.05 C
19344.4 C+1.31 C
19353.1 C+0.02 C
19363.3 C+0.24 C
19374.1 C+1.07 C
19384.7 C+1.68 C
19392.7 C-0.36 C
19402.2 C-0.81 C
19411.5 C-1.50 C
19421.8 C-1.22 C
19433.1 C+0.06 C
19443.4 C+0.36 C
19452.7 C-0.36 C
19463.5 C+0.42 C
19472.4 C-0.69 C
19483.2 C+0.16 C
19493.0 C-0.03 C
19503.6 C+0.59 C
19512.4 C-0.68 C
19522.1 C-0.92 C
19533.9 C+0.86 C
19543.4 C+0.32 C
19551.1 C-1.92 C
19562.2 C-0.86 C
19572.7 C-0.33 C
19582.3 C-0.78 C
19593.4 C+0.35 C
19603.2 C+0.11 C
19613.4 C+0.34 C
19621.8 C-1.27 C
19632.9 C-0.17 C
19643.3 C+0.25 C
19651.7 C-1.39 C
19661.3 C-1.75 C
19672.8 C-0.26 C
19681.4 C-1.65 C
19692.8 C-0.24 C
19702.6 C-0.46 C
19711.9 C-1.12 C
19724.0 C+0.99 C
19732.4 C-0.61 C
19743.8 C+0.77 C
19752.6 C-0.47 C
19762.2 C-0.83 C
19772.0 C-1.02 C
19781.8 C-1.22 C
19792.6 C-0.42 C
19802.9 C-0.17 C
19811.4 C-1.65 C
19822.3 C-0.72 C
19832.6 C-0.45 C
19843.5 C+0.43 C
19852.2 C-0.80 C
19862.8 C-0.26 C
19872.0 C-1.04 C
19882.3 C-0.77 C
19893.6 C+0.51 C
19904.1 C+1.05 C
19913.5 C+0.47 C
19923.3 C+0.21 C
19933.1 C+0.05 C
19942.9 C-0.11 C
19952.4 C-0.63 C
19962.7 C-0.35 C
19972.9 C-0.16 C
19982.7 C-0.32 C
19993.1 C+0.03 C
20003.3 C+0.27 C
20012.8 C-0.26 C
20023.3 C+0.28 C
20033.8 C+0.80 C
20044.1 C+1.04 C
20054.1 C+1.01 C
20064.1 C+1.01 C
20074.1 C+1.04 C
20083.3 C+0.27 C
20093.4 C+0.32 C
20102.6 C-0.48 C
20114.7 C+1.63 C
20122.9 C-0.13 C
20134.2 C+1.13 C
20143.9 C+0.84 C
20154.4 C+1.32 C
20164.3 C+1.27 C
20173.6 C+0.57 C
20184.0 C+0.91 C
20193.1 C+0.04 C
20204.2 C+1.20 C
20213.3 C+0.27 C
20224.1 C+1.04 C
20233.8 C+0.71 C
20245.0 C+1.93 C
20254.7 C+1.69 C

The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1925 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 101 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Tromso
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.1 C (0.1 to 0.2) per decade0.2 F (0.1 to 0.3) per decade1925 to 2025101Rise
Mean daily maximum0.1 C (0.1 to 0.2) per decade0.2 F (0.1 to 0.3) per decade1925 to 2025101Rise
Mean daily minimum0.08 C (0.03 to 0.13) per decade0.1 F (0.1 to 0.2) per decade1925 to 2025101Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1920 to 2026
Yearly extremes at Tromso: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)30.2 C (86.4 F)197225.3 C (77.5 F)103
Coldest night (TNn)-18.4 C (-1.1 F)1966-13.7 C (7.3 F)107
Wettest day (Rx1day)63.5 mm (2.5 in)196430.2 mm (1.2 in)107
Wettest five days (Rx5day)141.9 mm (5.6 in)196475.3 mm (3.0 in)107
Longest dry spell (CDD)40 days201919 days107

Hottest day (TXx)

Hottest day (TXx) at Tromso by year The hottest day of the year at Tromso, 1920 to 2026. The record is 30.2 C (86.4 F) in 1972, marked on the chart; the median year is 25.3 C (77.5 F). 1520253035192019401960198020002020Record: 30.2 C (86.4 F) in 1972
The hottest day of the year at Tromso, 1920 to 2026. The record is 30.2 C (86.4 F) in 1972, marked on the chart; the median year is 25.3 C (77.5 F).
Hottest day (TXx) at Tromso by year
YearHottest day (TXx)
1920n/a
1921n/a
1922n/a
1923n/a
192416.0 C (60.8 F)
192524.4 C (75.9 F)
192624.2 C (75.6 F)
192726.0 C (78.8 F)
192823.0 C (73.4 F)
192920.0 C (68.0 F)
193027.9 C (82.2 F)
193126.4 C (79.5 F)
193222.9 C (73.2 F)
193326.0 C (78.8 F)
193428.1 C (82.6 F)
193522.8 C (73.0 F)
193627.1 C (80.8 F)
193727.8 C (82.0 F)
193824.8 C (76.6 F)
193927.7 C (81.9 F)
194025.9 C (78.6 F)
194126.3 C (79.3 F)
194222.8 C (73.0 F)
194327.4 C (81.3 F)
194425.0 C (77.0 F)
194525.1 C (77.2 F)
194626.0 C (78.8 F)
194724.4 C (75.9 F)
194825.6 C (78.1 F)
194923.2 C (73.8 F)
195025.4 C (77.7 F)
195123.1 C (73.6 F)
195224.2 C (75.6 F)
195327.0 C (80.6 F)
195427.9 C (82.2 F)
195522.2 C (72.0 F)
195626.5 C (79.7 F)
195728.5 C (83.3 F)
195824.5 C (76.1 F)
195925.3 C (77.5 F)
196026.5 C (79.7 F)
196126.7 C (80.1 F)
196221.6 C (70.9 F)
196323.3 C (73.9 F)
196423.5 C (74.3 F)
196520.8 C (69.4 F)
196627.8 C (82.0 F)
196724.7 C (76.5 F)
196823.0 C (73.4 F)
196926.4 C (79.5 F)
197028.7 C (83.7 F)
197123.2 C (73.8 F)
197230.2 C (86.4 F)
197328.8 C (83.8 F)
197429.5 C (85.1 F)
197524.7 C (76.5 F)
197623.8 C (74.8 F)
197722.5 C (72.5 F)
197825.5 C (77.9 F)
197927.5 C (81.5 F)
198023.5 C (74.3 F)
198123.3 C (73.9 F)
198224.6 C (76.3 F)
198322.5 C (72.5 F)
198425.6 C (78.1 F)
198525.7 C (78.3 F)
198625.7 C (78.3 F)
198726.6 C (79.9 F)
198827.4 C (81.3 F)
198925.3 C (77.5 F)
199024.2 C (75.6 F)
199121.7 C (71.1 F)
199225.0 C (77.0 F)
199324.5 C (76.1 F)
199427.4 C (81.3 F)
199520.0 C (68.0 F)
199624.9 C (76.8 F)
199725.1 C (77.2 F)
199826.7 C (80.1 F)
199927.2 C (81.0 F)
200022.6 C (72.7 F)
200124.4 C (75.9 F)
200223.6 C (74.5 F)
200325.8 C (78.4 F)
200426.3 C (79.3 F)
200525.1 C (77.2 F)
200622.3 C (72.1 F)
200724.6 C (76.3 F)
200822.1 C (71.8 F)
200925.6 C (78.1 F)
201021.5 C (70.7 F)
201128.8 C (83.8 F)
201222.3 C (72.1 F)
201328.3 C (82.9 F)
201429.7 C (85.5 F)
201523.2 C (73.8 F)
201627.6 C (81.7 F)
201724.0 C (75.2 F)
201828.6 C (83.5 F)
201925.7 C (78.3 F)
202025.7 C (78.3 F)
202128.7 C (83.7 F)
202230.1 C (86.2 F)
202327.4 C (81.3 F)
202428.5 C (83.3 F)
202527.3 C (81.1 F)
202625.3 C (77.5 F)

Coldest night (TNn)

Coldest night (TNn) at Tromso by year The coldest night of the year at Tromso, 1920 to 2026. The record is -18.4 C (-1.1 F) in 1966, marked on the chart; the median year is -13.7 C (7.3 F). -20-17.5-15-12.5-10-7.5192019401960198020002020Record: -18.4 C (-1.1 F) in 1966
The coldest night of the year at Tromso, 1920 to 2026. The record is -18.4 C (-1.1 F) in 1966, marked on the chart; the median year is -13.7 C (7.3 F).
Coldest night (TNn) at Tromso by year
YearColdest night (TNn)
1920-11.2 C (11.8 F)
1921-12.8 C (9.0 F)
1922-12.7 C (9.1 F)
1923-13.8 C (7.2 F)
1924-14.3 C (6.3 F)
1925-14.3 C (6.3 F)
1926-15.4 C (4.3 F)
1927-13.5 C (7.7 F)
1928-11.8 C (10.8 F)
1929-14.3 C (6.3 F)
1930-12.1 C (10.2 F)
1931-13.2 C (8.2 F)
1932-12.3 C (9.9 F)
1933-13.5 C (7.7 F)
1934-12.2 C (10.0 F)
1935-12.3 C (9.9 F)
1936-15.0 C (5.0 F)
1937-14.2 C (6.4 F)
1938-9.7 C (14.5 F)
1939-12.7 C (9.1 F)
1940-13.7 C (7.3 F)
1941-15.4 C (4.3 F)
1942-15.5 C (4.1 F)
1943-13.2 C (8.2 F)
1944-10.8 C (12.6 F)
1945-14.7 C (5.5 F)
1946-14.9 C (5.2 F)
1947-14.7 C (5.5 F)
1948-12.8 C (9.0 F)
1949-12.5 C (9.5 F)
1950-14.0 C (6.8 F)
1951-12.4 C (9.7 F)
1952-12.9 C (8.8 F)
1953-13.6 C (7.5 F)
1954-11.7 C (10.9 F)
1955-14.8 C (5.4 F)
1956-13.3 C (8.1 F)
1957-14.0 C (6.8 F)
1958-15.8 C (3.6 F)
1959-14.6 C (5.7 F)
1960-14.5 C (5.9 F)
1961-13.1 C (8.4 F)
1962-14.1 C (6.6 F)
1963-14.5 C (5.9 F)
1964-12.0 C (10.4 F)
1965-13.6 C (7.5 F)
1966-18.4 C (-1.1 F)
1967-15.6 C (3.9 F)
1968-14.8 C (5.4 F)
1969-15.0 C (5.0 F)
1970-15.3 C (4.5 F)
1971-15.0 C (5.0 F)
1972-11.0 C (12.2 F)
1973-12.8 C (9.0 F)
1974-15.2 C (4.6 F)
1975-12.4 C (9.7 F)
1976-15.0 C (5.0 F)
1977-14.2 C (6.4 F)
1978-17.0 C (1.4 F)
1979-18.3 C (-0.9 F)
1980-18.3 C (-0.9 F)
1981-16.2 C (2.8 F)
1982-15.3 C (4.5 F)
1983-12.5 C (9.5 F)
1984-12.4 C (9.7 F)
1985-16.5 C (2.3 F)
1986-17.1 C (1.2 F)
1987-17.2 C (1.0 F)
1988-13.7 C (7.3 F)
1989-15.2 C (4.6 F)
1990-11.4 C (11.5 F)
1991-12.4 C (9.7 F)
1992-12.6 C (9.3 F)
1993-12.9 C (8.8 F)
1994-13.4 C (7.9 F)
1995-16.6 C (2.1 F)
1996-13.2 C (8.2 F)
1997-14.3 C (6.3 F)
1998-15.9 C (3.4 F)
1999-14.4 C (6.1 F)
2000-13.5 C (7.7 F)
2001-14.9 C (5.2 F)
2002-14.2 C (6.4 F)
2003-13.4 C (7.9 F)
2004-11.7 C (10.9 F)
2005-12.6 C (9.3 F)
2006-11.5 C (11.3 F)
2007-15.0 C (5.0 F)
2008-10.7 C (12.7 F)
2009-13.7 C (7.3 F)
2010-16.7 C (1.9 F)
2011-14.0 C (6.8 F)
2012-18.3 C (-0.9 F)
2013-11.4 C (11.5 F)
2014-13.0 C (8.6 F)
2015-13.2 C (8.2 F)
2016-16.9 C (1.6 F)
2017-13.4 C (7.9 F)
2018-13.1 C (8.4 F)
2019-14.3 C (6.3 F)
2020-12.2 C (10.0 F)
2021-12.1 C (10.2 F)
2022-12.0 C (10.4 F)
2023-13.9 C (7.0 F)
2024-13.5 C (7.7 F)
2025-11.8 C (10.8 F)
2026-14.8 C (5.4 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Tromso by year The wettest day of the year at Tromso, 1920 to 2026. The record is 63.5 mm (2.5 in) in 1964, marked on the chart; the median year is 30.2 mm (1.2 in). 20406080192019401960198020002020Record: 63.5 mm (2.5 in) in 1964
The wettest day of the year at Tromso, 1920 to 2026. The record is 63.5 mm (2.5 in) in 1964, marked on the chart; the median year is 30.2 mm (1.2 in).
Wettest day (Rx1day) at Tromso by year
YearWettest day (Rx1day)
192028.4 mm (1.1 in)
192129.4 mm (1.2 in)
192226.2 mm (1.0 in)
192326.9 mm (1.1 in)
192447.0 mm (1.9 in)
192545.5 mm (1.8 in)
192623.3 mm (0.9 in)
192725.8 mm (1.0 in)
192846.5 mm (1.8 in)
192932.7 mm (1.3 in)
193024.5 mm (1.0 in)
193135.1 mm (1.4 in)
193230.2 mm (1.2 in)
193331.0 mm (1.2 in)
193424.2 mm (1.0 in)
193542.0 mm (1.7 in)
193626.9 mm (1.1 in)
193729.3 mm (1.2 in)
193825.4 mm (1.0 in)
193930.2 mm (1.2 in)
194028.3 mm (1.1 in)
194137.8 mm (1.5 in)
194228.1 mm (1.1 in)
194330.0 mm (1.2 in)
194422.1 mm (0.9 in)
194533.6 mm (1.3 in)
194645.0 mm (1.8 in)
194728.8 mm (1.1 in)
194833.4 mm (1.3 in)
194932.0 mm (1.3 in)
195024.3 mm (1.0 in)
195131.6 mm (1.2 in)
195238.5 mm (1.5 in)
195332.9 mm (1.3 in)
195432.4 mm (1.3 in)
195536.0 mm (1.4 in)
195629.7 mm (1.2 in)
195722.5 mm (0.9 in)
195833.7 mm (1.3 in)
195930.1 mm (1.2 in)
196023.0 mm (0.9 in)
196148.9 mm (1.9 in)
196235.4 mm (1.4 in)
196328.6 mm (1.1 in)
196463.5 mm (2.5 in)
196537.9 mm (1.5 in)
196625.1 mm (1.0 in)
196734.0 mm (1.3 in)
196820.4 mm (0.8 in)
196929.5 mm (1.2 in)
197033.0 mm (1.3 in)
197139.7 mm (1.6 in)
197226.5 mm (1.0 in)
197327.9 mm (1.1 in)
197425.8 mm (1.0 in)
197549.5 mm (1.9 in)
197622.8 mm (0.9 in)
197726.9 mm (1.1 in)
197823.7 mm (0.9 in)
197923.0 mm (0.9 in)
198020.4 mm (0.8 in)
198136.5 mm (1.4 in)
198226.4 mm (1.0 in)
198332.7 mm (1.3 in)
198430.2 mm (1.2 in)
198537.7 mm (1.5 in)
198620.5 mm (0.8 in)
198733.2 mm (1.3 in)
198827.8 mm (1.1 in)
198931.2 mm (1.2 in)
199042.6 mm (1.7 in)
199124.7 mm (1.0 in)
199222.0 mm (0.9 in)
199326.6 mm (1.0 in)
199430.9 mm (1.2 in)
199527.5 mm (1.1 in)
199626.0 mm (1.0 in)
199724.8 mm (1.0 in)
199831.8 mm (1.3 in)
199931.2 mm (1.2 in)
200041.3 mm (1.6 in)
200143.0 mm (1.7 in)
200239.5 mm (1.6 in)
200338.3 mm (1.5 in)
200442.4 mm (1.7 in)
200538.5 mm (1.5 in)
200636.4 mm (1.4 in)
200734.3 mm (1.4 in)
200827.0 mm (1.1 in)
200924.9 mm (1.0 in)
201034.7 mm (1.4 in)
201132.9 mm (1.3 in)
201223.4 mm (0.9 in)
201350.0 mm (2.0 in)
201425.0 mm (1.0 in)
201533.7 mm (1.3 in)
201632.4 mm (1.3 in)
201728.8 mm (1.1 in)
201820.2 mm (0.8 in)
201926.0 mm (1.0 in)
202040.3 mm (1.6 in)
202125.7 mm (1.0 in)
202233.3 mm (1.3 in)
202335.5 mm (1.4 in)
202435.8 mm (1.4 in)
202534.9 mm (1.4 in)
202624.3 mm (1.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Tromso by year The wettest five days of the year at Tromso, 1920 to 2026. The record is 141.9 mm (5.6 in) in 1964, marked on the chart; the median year is 75.3 mm (3.0 in). 050100150192019401960198020002020Record: 141.9 mm (5.6 in) in 1964
The wettest five days of the year at Tromso, 1920 to 2026. The record is 141.9 mm (5.6 in) in 1964, marked on the chart; the median year is 75.3 mm (3.0 in).
Wettest five days (Rx5day) at Tromso by year
YearWettest five days (Rx5day)
192058.6 mm (2.3 in)
192163.7 mm (2.5 in)
192277.8 mm (3.1 in)
192355.5 mm (2.2 in)
192487.2 mm (3.4 in)
192587.1 mm (3.4 in)
192646.5 mm (1.8 in)
192757.4 mm (2.3 in)
192866.8 mm (2.6 in)
192969.0 mm (2.7 in)
193068.6 mm (2.7 in)
193164.0 mm (2.5 in)
193275.7 mm (3.0 in)
193372.5 mm (2.9 in)
193460.2 mm (2.4 in)
193578.1 mm (3.1 in)
193683.9 mm (3.3 in)
193773.1 mm (2.9 in)
193876.6 mm (3.0 in)
193998.5 mm (3.9 in)
194062.8 mm (2.5 in)
194189.0 mm (3.5 in)
194276.3 mm (3.0 in)
194367.2 mm (2.6 in)
194465.7 mm (2.6 in)
194586.6 mm (3.4 in)
194679.4 mm (3.1 in)
194785.9 mm (3.4 in)
194882.8 mm (3.3 in)
194968.1 mm (2.7 in)
195066.2 mm (2.6 in)
195160.2 mm (2.4 in)
195258.9 mm (2.3 in)
195396.9 mm (3.8 in)
195476.9 mm (3.0 in)
195564.1 mm (2.5 in)
195673.1 mm (2.9 in)
195769.9 mm (2.8 in)
195880.0 mm (3.1 in)
195962.1 mm (2.4 in)
196049.6 mm (2.0 in)
196182.1 mm (3.2 in)
196283.6 mm (3.3 in)
196373.4 mm (2.9 in)
1964141.9 mm (5.6 in)
196585.0 mm (3.3 in)
196672.1 mm (2.8 in)
196755.1 mm (2.2 in)
196857.5 mm (2.3 in)
196952.7 mm (2.1 in)
197062.0 mm (2.4 in)
197198.0 mm (3.9 in)
197262.5 mm (2.5 in)
197363.8 mm (2.5 in)
197467.6 mm (2.7 in)
197591.5 mm (3.6 in)
197657.8 mm (2.3 in)
197748.5 mm (1.9 in)
197863.3 mm (2.5 in)
197940.2 mm (1.6 in)
198045.5 mm (1.8 in)
198183.6 mm (3.3 in)
198255.6 mm (2.2 in)
198363.2 mm (2.5 in)
198464.8 mm (2.6 in)
1985119.3 mm (4.7 in)
198654.7 mm (2.2 in)
198782.1 mm (3.2 in)
198878.5 mm (3.1 in)
198999.6 mm (3.9 in)
199077.6 mm (3.1 in)
199180.4 mm (3.2 in)
199279.5 mm (3.1 in)
199368.1 mm (2.7 in)
199462.5 mm (2.5 in)
199587.8 mm (3.5 in)
199698.6 mm (3.9 in)
199787.0 mm (3.4 in)
199879.2 mm (3.1 in)
199978.6 mm (3.1 in)
200079.1 mm (3.1 in)
2001102.5 mm (4.0 in)
200280.8 mm (3.2 in)
200382.1 mm (3.2 in)
200499.1 mm (3.9 in)
200574.4 mm (2.9 in)
200684.5 mm (3.3 in)
200790.5 mm (3.6 in)
200848.7 mm (1.9 in)
200971.8 mm (2.8 in)
2010100.6 mm (4.0 in)
201175.3 mm (3.0 in)
201262.3 mm (2.5 in)
2013110.4 mm (4.3 in)
201478.7 mm (3.1 in)
201583.2 mm (3.3 in)
201675.0 mm (3.0 in)
201766.3 mm (2.6 in)
201857.4 mm (2.3 in)
201982.8 mm (3.3 in)
202082.0 mm (3.2 in)
202170.1 mm (2.8 in)
202277.2 mm (3.0 in)
202387.2 mm (3.4 in)
2024105.9 mm (4.2 in)
2025108.4 mm (4.3 in)
202674.7 mm (2.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Tromso by year The longest dry spell of the year at Tromso, 1920 to 2026. The record is 40 days in 2019, marked on the chart; the median year is 19 days. 10203040192019401960198020002020Record: 40 days in 2019
The longest dry spell of the year at Tromso, 1920 to 2026. The record is 40 days in 2019, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Tromso by year
YearLongest dry spell (CDD)
192011 days
192116 days
192222 days
192327 days
192426 days
192517 days
192622 days
192724 days
192816 days
192926 days
193022 days
193135 days
193212 days
193322 days
193429 days
193515 days
193629 days
193729 days
193818 days
193914 days
194016 days
194117 days
194221 days
194310 days
194420 days
194515 days
194620 days
194717 days
194824 days
194924 days
195017 days
195114 days
195222 days
195327 days
195423 days
195517 days
195637 days
195720 days
195825 days
195914 days
196020 days
196114 days
196219 days
196314 days
196418 days
196523 days
196629 days
196714 days
196815 days
196926 days
197015 days
197125 days
197222 days
197315 days
197433 days
197513 days
197620 days
197712 days
197820 days
197923 days
198018 days
198116 days
198216 days
198326 days
198420 days
198516 days
198622 days
198726 days
198831 days
198922 days
199015 days
199125 days
199223 days
199314 days
199410 days
199515 days
199613 days
199724 days
199821 days
199919 days
200017 days
200121 days
200216 days
200313 days
200412 days
200513 days
200616 days
200716 days
200817 days
200915 days
201017 days
201111 days
201233 days
201320 days
201421 days
201512 days
201616 days
201720 days
201833 days
201940 days
202013 days
202114 days
202215 days
202319 days
202411 days
202512 days
202619 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

101 years with a frost

Across 101 years with a frost, the median last spring frost at Tromso falls on 23 May and the median first autumn frost on 30 September, which leaves a median of 130 days between them.

In 1996 to 2025 the median growing season was 144 days. That is 17 days more than in 1925 to 1954.

Fitted over all years, the growing season changes by +2.5 days per decade at this station.

Frost dates and growing season at Tromso
MeasureMedian, all yearsEarliest period (1925 to 1954)Recent period (1996 to 2025)Recent against earliestFitted trend
Last spring frost23 May30 May16 May14 days earlier-1.7 days per decade
First autumn frost30 September30 September8 October8 days later+0.9 days per decade
Growing days130 days127 days144 days17 days more+2.5 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

105 years, 1921 to 2025

A day with at least 30.5 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 56.5 mm (2.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Tromso: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years30.5 mm (1.2 in)
5 years37.3 mm (1.5 in)
10 years41.9 mm (1.6 in)
25 years47.7 mm (1.9 in)
50 years52.1 mm (2.1 in)
100 years56.5 mm (2.2 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 105 years of values from 1921 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 63.5 mm (2.5 in) in 1964; 50.0 mm (2.0 in) in 2013; 49.5 mm (1.9 in) in 1975.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Tromso, at 2011. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 2011 ran 0.2 C (0.3 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Tromso, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
2011+0.2+0.3likely5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Climate Twins

2011 to 2025 against 1961 to 1990

Over 2011 to 2025, Tromso had a mean temperature of 4.0 C (39.2 F) and 1,135.2 mm (44.7 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Bodoe VI (Norway, 324 km away), Sortland-Kleiva (Norway, 182 km away) and Andoya (Norway, 115 km away).

Climate twins of Tromso: stations whose 1961 to 1990 climate is closest to its 2011 to 2025 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
Bodoe VINorway324 km (201 mi)4.6 C (40.2 F)1,020.8 mm (40.2 in)0.95
Sortland-KleivaNorway182 km (113 mi)4.0 C (39.2 F)1,394.9 mm (54.9 in)1.17
AndoyaNorway115 km (71 mi)3.4 C (38.0 F)1,035.1 mm (40.8 in)1.20

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

  • Data for Tromso standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Tromso threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-13).