Built 2026-10-17 (17 October 2026)

Norwich Weather Records (USC00306085)

Record envelope, standing records and threshold days for Norwich (USC00306085), New York, United States, with 121 years of record.

Key Facts for Norwich

  • Norwich (USC00306085) is a weather station in New York, United States at 42.51 latitude and -75.52 longitude, 301 m (989 ft) above sea level.
  • The station reports from 1906 to 2026, 121 years of record.
  • 1,464 records set at Norwich still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Norwich set a daily record precipitation of 29.2 mm (1.1 in) on 12 October 2026 (provisional).

Provisional Records

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

About the Station

  • Location: New York, United States, 42.51 latitude, -75.52 longitude.
  • Elevation: 301 m (989 ft).
  • Period of record: 1906 to 2026, 121 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

4 days at or beyond a record
Daily record high and record low at Norwich, with 2026 drawn through them The band shows the record high and record low for each calendar day at Norwich. The lines show the 2026 daily maximum and minimum. 4 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Norwich. The lines show the 2026 daily maximum and minimum. 4 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Norwich, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan18.9 C (66.0 F)-35.6 C (-32.1 F)5.6 C (42.1 F)-25.0 C (-13.0 F)
Feb23.3 C (73.9 F)-33.9 C (-29.0 F)3.9 C (39.0 F)-28.9 C (-20.0 F)
Mar30.0 C (86.0 F)-28.3 C (-18.9 F)23.3 C (73.9 F)-15.6 C (3.9 F)
Apr33.3 C (91.9 F)-16.1 C (3.0 F)27.2 C (81.0 F)-9.4 C (15.1 F)
May34.4 C (93.9 F)-6.7 C (19.9 F)31.1 C (88.0 F)-2.2 C (28.0 F)
Jun36.7 C (98.1 F)-1.7 C (28.9 F)27.8 C (82.0 F)1.1 C (34.0 F)
Jul38.3 C (100.9 F)1.7 C (35.1 F)31.7 C (89.1 F)6.7 C (44.1 F)
Aug37.8 C (100.0 F)-2.8 C (27.0 F)30.0 C (86.0 F)7.8 C (46.0 F)
Sep37.2 C (99.0 F)-6.7 C (19.9 F)26.7 C (80.1 F)2.2 C (36.0 F)
Oct31.1 C (88.0 F)-11.7 C (10.9 F)22.2 C (72.0 F)-1.1 C (30.0 F)
Nov26.7 C (80.1 F)-22.2 C (-8.0 F)n/an/a
Dec18.9 C (66.0 F)-35.0 C (-31.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Norwich by the year they were set 1,464 records at Norwich still stand. 1940 holds the most, with 29. 01020301906: 41907: 71908: 161909: 151910: 101911: 201914: 81915: 101916: 191917: 181918: 181919: 211920: 141921: 71922: 111923: 91924: 71925: 151926: 141927: 101928: 151929: 151930: 211931: 201932: 111933: 201934: 181935: 161936: 251937: 111938: 211939: 181940: 291941: 191942: 161943: 221944: 121945: 111946: 121947: 181948: 221949: 111950: 171951: 221952: 71953: 151954: 211955: 101956: 161957: 191958: 131959: 171960: 171961: 81962: 121963: 251964: 181965: 171966: 161967: 101968: 131969: 41970: 81971: 61972: 71973: 71974: 121975: 201976: 131977: 51978: 51979: 291980: 81981: 91982: 111983: 71984: 161985: 41986: 91987: 51988: 171989: 111990: 141991: 171992: 121993: 81994: 121995: 121996: 71997: 41998: 81999: 112000: 82001: 52002: 122003: 32004: 72005: 92006: 32007: 62008: 92009: 42010: 72011: 42012: 162013: 52014: 102015: 192016: 82017: 112018: 142019: 92020: 112021: 82022: 62023: 52024: 52025: 72026: 61906192019321944195619681980199220042016
1,464 records at Norwich still stand. 1940 holds the most, with 29.
Standing records at Norwich by the year they were set
Year setStanding records
19064
19077
190816
190915
191010
191120
19148
191510
191619
191718
191818
191921
192014
19217
192211
19239
19247
192515
192614
192710
192815
192915
193021
193120
193211
193320
193418
193516
193625
193711
193821
193918
194029
194119
194216
194322
194412
194511
194612
194718
194822
194911
195017
195122
19527
195315
195421
195510
195616
195719
195813
195917
196017
19618
196212
196325
196418
196517
196616
196710
196813
19694
19708
19716
19727
19737
197412
197520
197613
19775
19785
197929
19808
19819
198211
19837
198416
19854
19869
19875
198817
198911
199014
199117
199212
19938
199412
199512
19967
19974
19988
199911
20008
20015
200212
20033
20047
20059
20063
20076
20089
20094
20107
20114
201216
20135
201410
201519
20168
201711
201814
20199
202011
20218
20226
20235
20245
20257
20266

All-Time Record Progression

5 new records
When Norwich set new all-time records 5 all-time records were set at Norwich between 15 January 1957 and 17 December 2020. Each dot is a new record. Record low minimum temperatureRecord snow depthRecord daily snowfall15 January 1957: Record low minimum temperature -35.6 C (-32.1 F)21 January 1978: Record snow depth 88.9 cm (35.0 in)16 January 1983: Record daily snowfall 55.4 cm (21.8 in)15 March 2017: Record daily snowfall 61.0 cm (24.0 in)17 December 2020: Record daily snowfall 66.0 cm (26.0 in)1960197019801990200020102020
5 all-time records were set at Norwich between 15 January 1957 and 17 December 2020. Each dot is a new record.
When Norwich set new all-time records
DateKindDetail
1957-01-15Record low minimum temperatureRecord low minimum temperature -35.6 C (-32.1 F)
1978-01-21Record snow depthRecord snow depth 88.9 cm (35.0 in)
1983-01-16Record daily snowfallRecord daily snowfall 55.4 cm (21.8 in)
2017-03-15Record daily snowfallRecord daily snowfall 61.0 cm (24.0 in)
2020-12-17Record daily snowfallRecord daily snowfall 66.0 cm (26.0 in)

Wettest Day of Each Month

Jul: 154.9 mm (6.1 in)
Record daily precipitation for each month at Norwich The wettest day on record for each calendar month at Norwich. The most was 154.9 mm (6.1 in) on 8 July 1935. 050100150200 Jan: 50.8 mm (2.0 in), 26 January 2005 Jan Feb: 46.5 mm (1.8 in), 25 February 1998 Feb Mar: 59.4 mm (2.3 in), 7 March 2011 Mar Apr: 71.6 mm (2.8 in), 16 April 1983 Apr May: 63.5 mm (2.5 in), 1 May 2023 May Jun: 102.6 mm (4.0 in), 23 June 2025 Jun Jul: 154.9 mm (6.1 in), 8 July 1935 Jul Aug: 93.0 mm (3.7 in), 31 August 1940 Aug Sep: 145.3 mm (5.7 in), 8 September 2011 Sep Oct: 102.6 mm (4.0 in), 6 October 1932 Oct Nov: 68.1 mm (2.7 in), 9 November 1972 Nov Dec: 72.4 mm (2.9 in), 26 December 2002 Dec
The wettest day on record for each calendar month at Norwich. The most was 154.9 mm (6.1 in) on 8 July 1935.
Record daily precipitation for each month at Norwich
MonthRecord daily precipitation (mm)Date
Jan50.8 mm (2.0 in)26 January 2005
Feb46.5 mm (1.8 in)25 February 1998
Mar59.4 mm (2.3 in)7 March 2011
Apr71.6 mm (2.8 in)16 April 1983
May63.5 mm (2.5 in)1 May 2023
Jun102.6 mm (4.0 in)23 June 2025
Jul154.9 mm (6.1 in)8 July 1935
Aug93.0 mm (3.7 in)31 August 1940
Sep145.3 mm (5.7 in)8 September 2011
Oct102.6 mm (4.0 in)6 October 1932
Nov68.1 mm (2.7 in)9 November 1972
Dec72.4 mm (2.9 in)26 December 2002

Period of Record Coverage

1906 to 2026
Days with data per year at Norwich 119 years of record at Norwich, 1906 to 2026. 9 years have data for under 90 percent of days and are left out of rankings: 1906, 1910, 1911, 1914, 1932, 1981, 2000, 2006 and others. 1906: 131 of 365 days1907: 338 of 365 days1908: 346 of 366 days1909: 339 of 365 days1910: 324 of 365 days1911: 231 of 365 days1914: 181 of 365 days1915: 350 of 365 days1916: 361 of 366 days1917: 364 of 365 days1918: 364 of 365 days1919: 361 of 365 days1920: 364 of 366 days1921: 329 of 365 days1922: 364 of 365 days1923: 363 of 365 days1924: 361 of 366 days1925: 361 of 365 days1926: 364 of 365 days1927: 363 of 365 days1928: 363 of 366 days1929: 363 of 365 days1930: 364 of 365 days1931: 362 of 365 days1932: 271 of 366 days1933: 364 of 365 days1934: 362 of 365 days1935: 364 of 365 days1936: 365 of 366 days1937: 364 of 365 days1938: 361 of 365 days1939: 365 of 365 days1940: 362 of 366 days1941: 365 of 365 days1942: 365 of 365 days1943: 365 of 365 days1944: 366 of 366 days1945: 330 of 365 days1946: 365 of 365 days1947: 365 of 365 days1948: 366 of 366 days1949: 364 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 364 of 365 days1954: 365 of 365 days1955: 364 of 365 days1956: 365 of 366 days1957: 363 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: 362 of 365 days1971: 358 of 365 days1972: 361 of 366 days1973: 334 of 365 days1974: 334 of 365 days1975: 365 of 365 days1976: 361 of 366 days1977: 364 of 365 days1978: 364 of 365 days1979: 364 of 365 days1980: 356 of 366 days1981: 303 of 365 days1982: 364 of 365 days1983: 365 of 365 days1984: 364 of 366 days1985: 363 of 365 days1986: 364 of 365 days1987: 365 of 365 days1988: 360 of 366 days1989: 363 of 365 days1990: 360 of 365 days1991: 364 of 365 days1992: 363 of 366 days1993: 364 of 365 days1994: 362 of 365 days1995: 364 of 365 days1996: 365 of 366 days1997: 362 of 365 days1998: 332 of 365 days1999: 362 of 365 days2000: 329 of 366 days2001: 362 of 365 days2002: 365 of 365 days2003: 363 of 365 days2004: 362 of 366 days2005: 365 of 365 days2006: 271 of 365 days2007: 364 of 365 days2008: 363 of 366 days2009: 359 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 363 of 366 days2013: 364 of 365 days2014: 363 of 365 days2015: 362 of 365 days2016: 365 of 366 days2017: 357 of 365 days2018: 350 of 365 days2019: 362 of 365 days2020: 359 of 366 days2021: 362 of 365 days2022: 362 of 365 days2023: 362 of 365 days2024: 361 of 366 days2025: 357 of 365 days2026: 269 of 365 days19201935195019651980199520102025
119 years of record at Norwich, 1906 to 2026. 9 years have data for under 90 percent of days and are left out of rankings: 1906, 1910, 1911, 1914, 1932, 1981, 2000, 2006 and others.
Days with data per year at Norwich
YearDays with dataShare of yearComplete
190613136%No
190733893%Yes
190834695%Yes
190933993%Yes
191032489%No
191123163%No
191418150%No
191535096%Yes
191636199%Yes
1917364100%Yes
1918364100%Yes
191936199%Yes
192036499%Yes
192132990%Yes
1922364100%Yes
192336399%Yes
192436199%Yes
192536199%Yes
1926364100%Yes
192736399%Yes
192836399%Yes
192936399%Yes
1930364100%Yes
193136299%Yes
193227174%No
1933364100%Yes
193436299%Yes
1935364100%Yes
1936365100%Yes
1937364100%Yes
193836199%Yes
1939365100%Yes
194036299%Yes
1941365100%Yes
1942365100%Yes
1943365100%Yes
1944366100%Yes
194533090%Yes
1946365100%Yes
1947365100%Yes
1948366100%Yes
1949364100%Yes
1950365100%Yes
1951365100%Yes
1952366100%Yes
1953364100%Yes
1954365100%Yes
1955364100%Yes
1956365100%Yes
195736399%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
197036299%Yes
197135898%Yes
197236199%Yes
197333492%Yes
197433492%Yes
1975365100%Yes
197636199%Yes
1977364100%Yes
1978364100%Yes
1979364100%Yes
198035697%Yes
198130383%No
1982364100%Yes
1983365100%Yes
198436499%Yes
198536399%Yes
1986364100%Yes
1987365100%Yes
198836098%Yes
198936399%Yes
199036099%Yes
1991364100%Yes
199236399%Yes
1993364100%Yes
199436299%Yes
1995364100%Yes
1996365100%Yes
199736299%Yes
199833291%Yes
199936299%Yes
200032990%No
200136299%Yes
2002365100%Yes
200336399%Yes
200436299%Yes
2005365100%Yes
200627174%No
2007364100%Yes
200836399%Yes
200935998%Yes
2010365100%Yes
2011365100%Yes
201236399%Yes
2013364100%Yes
201436399%Yes
201536299%Yes
2016365100%Yes
201735798%Yes
201835096%Yes
201936299%Yes
202035998%Yes
202136299%Yes
202236299%Yes
202336299%Yes
202436199%Yes
202535798%Yes
202626974%No

Latest Records

20
Latest records at Norwich
DateStationRecordValueBeat old record byOld record stoodSignificance
12 October 2026Norwich, USdaily rain (Provisional)29.2 mm (1.1 in)12.4 mm (0.5 in)36 years31 of 100 (Routine)
3 August 2026Norwich, USdaily rain33.8 mm (1.3 in)5.9 mm (0.23 in)39 years26 of 100 (Routine)
5 July 2026Norwich, USdaily rain23.9 mm (0.9 in)2.1 mm (0.08 in)36 years20 of 100 (Routine)
21 April 2026Norwich, USdaily low min-7.2 C (19.0 F)0.5 C (0.9 F)97 years40 of 100 (Notable)
17 April 2026Norwich, USdaily high min13.9 C (57.0 F)0.6 C (1.1 F)44 years24 of 100 (Routine)
16 April 2026Norwich, USdaily high min (Tie)11.7 C (53.1 F)tie32 years4 of 100 (Routine)
12 March 2026Norwich, USdaily high max23.3 C (73.9 F)1.6 C (2.9 F)48 years26 of 100 (Routine)
11 March 2026Norwich, USdaily high max22.8 C (73.0 F)2.8 C (5.0 F)48 years28 of 100 (Routine)
8 February 2026Norwich, USdaily low max-17.8 C (0.0 F)4.5 C (8.1 F)92 years44 of 100 (Notable)
8 February 2026Norwich, USdaily low min-28.9 C (-20.0 F)0.6 C (1.1 F)63 years28 of 100 (Routine)
26 January 2026Norwich, USdaily snowfall20.3 cm (8.0 in)2.5 cm (1.0 in)119 years44 of 100 (Notable)
10 December 2025Norwich, USdaily low min-22.2 C (-8.0 F)1.6 C (2.9 F)76 years34 of 100 (Routine)
9 December 2025Norwich, USdaily low min-21.1 C (-6.0 F)0.5 C (0.9 F)36 years20 of 100 (Routine)
6 December 2025Norwich, USdaily low min (Tie)-22.2 C (-8.0 F)tie90 years9 of 100 (Routine)
5 December 2025Norwich, USdaily low min-20.6 C (-5.1 F)0.6 C (1.1 F)84 years35 of 100 (Notable)
21 August 2025Norwich, USmonthly low max (Tie)13.9 C (57.0 F)tie63 years9 of 100 (Routine)
1 August 2025Norwich, USdaily low max17.8 C (64.0 F)0.5 C (0.9 F)47 years25 of 100 (Routine)
23 June 2025Norwich, USmonthly rain102.6 mm (4.0 in)7.9 mm (0.31 in)44 years40 of 100 (Notable)
1 June 2025Norwich, USdaily low max12.2 C (54.0 F)0.6 C (1.1 F)115 years41 of 100 (Notable)
23 May 2025Norwich, USdaily low max9.4 C (48.9 F)1.7 C (3.1 F)64 years31 of 100 (Routine)

Climate Trend

106 complete years, 1907 to 2025
Annual mean temperature at Norwich as warming stripes, 1907 to 2025 One stripe for each of 106 complete years at Norwich, 1907 to 2025. Blue stripes are years cooler than the station's own mean of 7.5 C (45.4 F); red stripes are warmer. The coolest year was 1958, at 5.4 C (41.8 F), and the warmest was 2012, at 9.5 C (49.0 F). The strongest colour marks a difference of 2.1 C (3.8 F). 1907: 7.0 C, -0.5 C from the station mean1908: 7.8 C, +0.4 C from the station mean1909: 7.8 C, +0.3 C from the station mean1910: 7.5 C, 0.0 C from the station mean1915: 7.7 C, +0.2 C from the station mean1916: 7.5 C, 0.0 C from the station mean1917: 6.1 C, -1.4 C from the station mean1918: 7.5 C, +0.1 C from the station mean1919: 8.5 C, +1.0 C from the station mean1920: 7.1 C, -0.4 C from the station mean1922: 8.4 C, +0.9 C from the station mean1923: 7.5 C, 0.0 C from the station mean1924: 7.0 C, -0.5 C from the station mean1925: 7.8 C, +0.3 C from the station mean1926: 6.1 C, -1.3 C from the station mean1927: 7.6 C, +0.1 C from the station mean1928: 7.4 C, 0.0 C from the station mean1929: 7.3 C, -0.2 C from the station mean1930: 7.8 C, +0.3 C from the station mean1931: 9.0 C, +1.5 C from the station mean1933: 8.1 C, +0.6 C from the station mean1934: 7.2 C, -0.3 C from the station mean1935: 6.9 C, -0.5 C from the station mean1936: 7.6 C, +0.2 C from the station mean1937: 8.0 C, +0.5 C from the station mean1938: 8.5 C, +1.0 C from the station mean1939: 7.5 C, 0.0 C from the station mean1940: 6.0 C, -1.5 C from the station mean1941: 7.3 C, -0.1 C from the station mean1942: 7.2 C, -0.2 C from the station mean1943: 6.3 C, -1.2 C from the station mean1944: 6.8 C, -0.6 C from the station mean1946: 7.7 C, +0.3 C from the station mean1947: 7.5 C, 0.0 C from the station mean1948: 7.1 C, -0.3 C from the station mean1949: 8.7 C, +1.2 C from the station mean1950: 6.9 C, -0.5 C from the station mean1951: 7.5 C, 0.0 C from the station mean1952: 7.8 C, +0.3 C from the station mean1953: 8.5 C, +1.0 C from the station mean1954: 7.5 C, 0.0 C from the station mean1955: 7.5 C, 0.0 C from the station mean1956: 6.5 C, -0.9 C from the station mean1957: 7.1 C, -0.3 C from the station mean1958: 5.4 C, -2.0 C from the station mean1959: 7.4 C, 0.0 C from the station mean1960: 6.5 C, -1.0 C from the station mean1961: 6.8 C, -0.6 C from the station mean1962: 6.0 C, -1.4 C from the station mean1963: 5.9 C, -1.6 C from the station mean1964: 7.0 C, -0.5 C from the station mean1965: 6.3 C, -1.1 C from the station mean1966: 6.7 C, -0.8 C from the station mean1967: 6.7 C, -0.8 C from the station mean1968: 6.4 C, -1.0 C from the station mean1969: 6.6 C, -0.9 C from the station mean1970: 6.3 C, -1.1 C from the station mean1971: 6.8 C, -0.6 C from the station mean1972: 6.6 C, -0.9 C from the station mean1975: 7.0 C, -0.5 C from the station mean1976: 6.5 C, -1.0 C from the station mean1977: 6.9 C, -0.6 C from the station mean1978: 6.1 C, -1.4 C from the station mean1979: 7.2 C, -0.3 C from the station mean1980: 6.6 C, -0.9 C from the station mean1982: 7.6 C, +0.1 C from the station mean1983: 8.3 C, +0.8 C from the station mean1984: 7.8 C, +0.3 C from the station mean1985: 7.5 C, 0.0 C from the station mean1986: 7.9 C, +0.4 C from the station mean1987: 7.7 C, +0.3 C from the station mean1988: 7.5 C, +0.1 C from the station mean1989: 7.3 C, -0.1 C from the station mean1990: 9.4 C, +1.9 C from the station mean1991: 9.3 C, +1.8 C from the station mean1992: 7.6 C, +0.2 C from the station mean1993: 7.6 C, +0.1 C from the station mean1994: 7.6 C, +0.2 C from the station mean1995: 8.0 C, +0.5 C from the station mean1996: 7.9 C, +0.4 C from the station mean1997: 7.9 C, +0.4 C from the station mean1999: 8.9 C, +1.5 C from the station mean2001: 8.4 C, +0.9 C from the station mean2002: 8.5 C, +1.1 C from the station mean2003: 7.0 C, -0.5 C from the station mean2004: 7.6 C, +0.1 C from the station mean2005: 7.9 C, +0.4 C from the station mean2007: 7.5 C, 0.0 C from the station mean2008: 7.7 C, +0.2 C from the station mean2009: 7.2 C, -0.3 C from the station mean2010: 8.4 C, +0.9 C from the station mean2011: 8.3 C, +0.8 C from the station mean2012: 9.5 C, +2.0 C from the station mean2013: 7.7 C, +0.2 C from the station mean2014: 6.9 C, -0.5 C from the station mean2015: 7.4 C, 0.0 C from the station mean2016: 8.6 C, +1.1 C from the station mean2017: 8.4 C, +0.9 C from the station mean2018: 8.0 C, +0.5 C from the station mean2019: 7.5 C, 0.0 C from the station mean2020: 8.1 C, +0.7 C from the station mean2021: 7.8 C, +0.3 C from the station mean2022: 7.7 C, +0.3 C from the station mean2023: 8.2 C, +0.7 C from the station mean2024: 8.6 C, +1.2 C from the station mean2025: 7.1 C, -0.4 C from the station mean190719201930194019501960197019801990200020102020
One stripe for each of 106 complete years at Norwich, 1907 to 2025. Blue stripes are years cooler than the station's own mean of 7.5 C (45.4 F); red stripes are warmer. The coolest year was 1958, at 5.4 C (41.8 F), and the warmest was 2012, at 9.5 C (49.0 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Norwich as warming stripes, 1907 to 2025
YearAnnual mean temperatureDifference from the station mean
19077.0 C-0.47 C
19087.8 C+0.37 C
19097.8 C+0.35 C
19107.5 C-0.01 C
19157.7 C+0.19 C
19167.5 C0.00 C
19176.1 C-1.41 C
19187.5 C+0.07 C
19198.5 C+1.01 C
19207.1 C-0.38 C
19228.4 C+0.91 C
19237.5 C+0.05 C
19247.0 C-0.46 C
19257.8 C+0.31 C
19266.1 C-1.34 C
19277.6 C+0.15 C
19287.4 C-0.04 C
19297.3 C-0.20 C
19307.8 C+0.29 C
19319.0 C+1.54 C
19338.1 C+0.61 C
19347.2 C-0.31 C
19356.9 C-0.53 C
19367.6 C+0.17 C
19378.0 C+0.55 C
19388.5 C+1.01 C
19397.5 C+0.04 C
19406.0 C-1.50 C
19417.3 C-0.12 C
19427.2 C-0.22 C
19436.3 C-1.18 C
19446.8 C-0.62 C
19467.7 C+0.28 C
19477.5 C+0.05 C
19487.1 C-0.32 C
19498.7 C+1.19 C
19506.9 C-0.53 C
19517.5 C-0.01 C
19527.8 C+0.35 C
19538.5 C+0.99 C
19547.5 C+0.01 C
19557.5 C+0.03 C
19566.5 C-0.93 C
19577.1 C-0.32 C
19585.4 C-2.02 C
19597.4 C-0.02 C
19606.5 C-0.97 C
19616.8 C-0.64 C
19626.0 C-1.42 C
19635.9 C-1.57 C
19647.0 C-0.47 C
19656.3 C-1.12 C
19666.7 C-0.76 C
19676.7 C-0.81 C
19686.4 C-1.04 C
19696.6 C-0.91 C
19706.3 C-1.13 C
19716.8 C-0.62 C
19726.6 C-0.89 C
19757.0 C-0.45 C
19766.5 C-1.01 C
19776.9 C-0.56 C
19786.1 C-1.41 C
19797.2 C-0.27 C
19806.6 C-0.91 C
19827.6 C+0.13 C
19838.3 C+0.79 C
19847.8 C+0.30 C
19857.5 C+0.04 C
19867.9 C+0.44 C
19877.7 C+0.26 C
19887.5 C+0.08 C
19897.3 C-0.13 C
19909.4 C+1.92 C
19919.3 C+1.81 C
19927.6 C+0.18 C
19937.6 C+0.13 C
19947.6 C+0.17 C
19958.0 C+0.51 C
19967.9 C+0.40 C
19977.9 C+0.39 C
19998.9 C+1.48 C
20018.4 C+0.89 C
20028.5 C+1.07 C
20037.0 C-0.50 C
20047.6 C+0.12 C
20057.9 C+0.39 C
20077.5 C+0.04 C
20087.7 C+0.19 C
20097.2 C-0.26 C
20108.4 C+0.91 C
20118.3 C+0.83 C
20129.5 C+1.99 C
20137.7 C+0.20 C
20146.9 C-0.52 C
20157.4 C-0.02 C
20168.6 C+1.12 C
20178.4 C+0.92 C
20188.0 C+0.51 C
20197.5 C+0.05 C
20208.1 C+0.67 C
20217.8 C+0.30 C
20227.7 C+0.27 C
20238.2 C+0.73 C
20248.6 C+1.18 C
20257.1 C-0.38 C

The annual mean temperature here has risen by 0.06 C (0.01 to 0.10) per decade over 1907 to 2025. In Fahrenheit: 0.10 F (0.03 to 0.18) per decade. The slope is a straight line fitted to 106 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Norwich
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.06 C (0.01 to 0.10) per decade0.10 F (0.03 to 0.18) per decade1907 to 2025106Rise
Mean daily maximum0.1 C (0.1 to 0.1) per decade0.2 F (0.1 to 0.3) per decade1907 to 2025106Rise
Mean daily minimum0.01 C (-0.05 to 0.07) per decade0.02 F (-0.08 to 0.12) per decade1907 to 2025106Not clearly different from zero

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

1906 to 2026
Yearly extremes at Norwich: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)38.3 C (100.9 F)193633.3 C (91.9 F)119
Coldest night (TNn)-35.6 C (-32.1 F)1957-27.2 C (-17.0 F)119
Wettest day (Rx1day)154.9 mm (6.1 in)193549.8 mm (2.0 in)121
Wettest five days (Rx5day)248.3 mm (9.8 in)193578.3 mm (3.1 in)121
Longest dry spell (CDD)36 days192414 days121

Hottest day (TXx)

Hottest day (TXx) at Norwich by year The hottest day of the year at Norwich, 1906 to 2026. The record is 38.3 C (100.9 F) in 1936, marked on the chart; the median year is 33.3 C (91.9 F). 303234363840192019401960198020002020Record: 38.3 C (100.9 F) in 1936
The hottest day of the year at Norwich, 1906 to 2026. The record is 38.3 C (100.9 F) in 1936, marked on the chart; the median year is 33.3 C (91.9 F).
Hottest day (TXx) at Norwich by year
YearHottest day (TXx)
190631.1 C (88.0 F)
190732.2 C (90.0 F)
190834.4 C (93.9 F)
190933.9 C (93.0 F)
191033.3 C (91.9 F)
191136.7 C (98.1 F)
1912n/a
1913n/a
191432.8 C (91.0 F)
191530.6 C (87.1 F)
191636.1 C (97.0 F)
191735.0 C (95.0 F)
191835.0 C (95.0 F)
191935.6 C (96.1 F)
192032.2 C (90.0 F)
192134.4 C (93.9 F)
192233.3 C (91.9 F)
192333.3 C (91.9 F)
192431.1 C (88.0 F)
192533.9 C (93.0 F)
192634.4 C (93.9 F)
192732.8 C (91.0 F)
192832.8 C (91.0 F)
192931.1 C (88.0 F)
193037.2 C (99.0 F)
193133.3 C (91.9 F)
193233.9 C (93.0 F)
193337.2 C (99.0 F)
193434.4 C (93.9 F)
193533.9 C (93.0 F)
193638.3 C (100.9 F)
193733.3 C (91.9 F)
193833.9 C (93.0 F)
193937.2 C (99.0 F)
194036.1 C (97.0 F)
194136.1 C (97.0 F)
194234.4 C (93.9 F)
194333.9 C (93.0 F)
194437.8 C (100.0 F)
194532.8 C (91.0 F)
194633.9 C (93.0 F)
194733.9 C (93.0 F)
194835.6 C (96.1 F)
194933.3 C (91.9 F)
195030.6 C (87.1 F)
195132.8 C (91.0 F)
195235.0 C (95.0 F)
195337.2 C (99.0 F)
195433.9 C (93.0 F)
195536.1 C (97.0 F)
195632.2 C (90.0 F)
195732.8 C (91.0 F)
195831.7 C (89.1 F)
195934.4 C (93.9 F)
196031.7 C (89.1 F)
196131.1 C (88.0 F)
196232.2 C (90.0 F)
196333.3 C (91.9 F)
196435.0 C (95.0 F)
196534.4 C (93.9 F)
196635.6 C (96.1 F)
196733.3 C (91.9 F)
196832.2 C (90.0 F)
196932.8 C (91.0 F)
197031.1 C (88.0 F)
197131.1 C (88.0 F)
197232.2 C (90.0 F)
197334.4 C (93.9 F)
197433.3 C (91.9 F)
197535.6 C (96.1 F)
197631.1 C (88.0 F)
197732.8 C (91.0 F)
197831.7 C (89.1 F)
197933.9 C (93.0 F)
198032.8 C (91.0 F)
198132.2 C (90.0 F)
198233.9 C (93.0 F)
198333.3 C (91.9 F)
198432.8 C (91.0 F)
198532.2 C (90.0 F)
198632.8 C (91.0 F)
198732.2 C (90.0 F)
198835.6 C (96.1 F)
198931.1 C (88.0 F)
199034.4 C (93.9 F)
199133.9 C (93.0 F)
199231.1 C (88.0 F)
199332.2 C (90.0 F)
199433.3 C (91.9 F)
199533.9 C (93.0 F)
199631.7 C (89.1 F)
199733.3 C (91.9 F)
199832.2 C (90.0 F)
199933.3 C (91.9 F)
200031.1 C (88.0 F)
200135.0 C (95.0 F)
200235.6 C (96.1 F)
200333.3 C (91.9 F)
200436.1 C (97.0 F)
200533.9 C (93.0 F)
200632.8 C (91.0 F)
200733.3 C (91.9 F)
200835.0 C (95.0 F)
200933.3 C (91.9 F)
201035.0 C (95.0 F)
201136.1 C (97.0 F)
201235.6 C (96.1 F)
201333.9 C (93.0 F)
201431.1 C (88.0 F)
201532.2 C (90.0 F)
201632.8 C (91.0 F)
201733.3 C (91.9 F)
201835.0 C (95.0 F)
201932.2 C (90.0 F)
202033.3 C (91.9 F)
202131.7 C (89.1 F)
202233.3 C (91.9 F)
202330.6 C (87.1 F)
202431.7 C (89.1 F)
202531.7 C (89.1 F)
202631.7 C (89.1 F)

Coldest night (TNn)

Coldest night (TNn) at Norwich by year The coldest night of the year at Norwich, 1906 to 2026. The record is -35.6 C (-32.1 F) in 1957, marked on the chart; the median year is -27.2 C (-17.0 F). -40-35-30-25-20-15192019401960198020002020Record: -35.6 C (-32.1 F) in 1957
The coldest night of the year at Norwich, 1906 to 2026. The record is -35.6 C (-32.1 F) in 1957, marked on the chart; the median year is -27.2 C (-17.0 F).
Coldest night (TNn) at Norwich by year
YearColdest night (TNn)
1906-18.9 C (-2.0 F)
1907-28.3 C (-18.9 F)
1908-27.8 C (-18.0 F)
1909-25.6 C (-14.1 F)
1910-28.9 C (-20.0 F)
1911-21.7 C (-7.1 F)
1912n/a
1913n/a
1914-30.6 C (-23.1 F)
1915-20.0 C (-4.0 F)
1916-28.3 C (-18.9 F)
1917-35.0 C (-31.0 F)
1918-30.0 C (-22.0 F)
1919-27.2 C (-17.0 F)
1920-30.0 C (-22.0 F)
1921-23.9 C (-11.0 F)
1922-29.4 C (-20.9 F)
1923-27.8 C (-18.0 F)
1924-26.1 C (-15.0 F)
1925-32.2 C (-26.0 F)
1926-24.4 C (-11.9 F)
1927-27.2 C (-17.0 F)
1928-21.1 C (-6.0 F)
1929-22.8 C (-9.0 F)
1930-26.7 C (-16.1 F)
1931-26.7 C (-16.1 F)
1932-24.4 C (-11.9 F)
1933-30.6 C (-23.1 F)
1934-33.9 C (-29.0 F)
1935-28.3 C (-18.9 F)
1936-29.4 C (-20.9 F)
1937-19.4 C (-2.9 F)
1938-31.7 C (-25.1 F)
1939-27.8 C (-18.0 F)
1940-28.9 C (-20.0 F)
1941-25.6 C (-14.1 F)
1942-32.2 C (-26.0 F)
1943-30.0 C (-22.0 F)
1944-24.4 C (-11.9 F)
1945-28.9 C (-20.0 F)
1946-24.4 C (-11.9 F)
1947-22.2 C (-8.0 F)
1948-32.2 C (-26.0 F)
1949-20.6 C (-5.1 F)
1950-28.3 C (-18.9 F)
1951-26.7 C (-16.1 F)
1952-21.1 C (-6.0 F)
1953-18.9 C (-2.0 F)
1954-27.8 C (-18.0 F)
1955-30.0 C (-22.0 F)
1956-27.2 C (-17.0 F)
1957-35.6 C (-32.1 F)
1958-28.9 C (-20.0 F)
1959-26.1 C (-15.0 F)
1960-27.2 C (-17.0 F)
1961-33.9 C (-29.0 F)
1962-28.9 C (-20.0 F)
1963-31.7 C (-25.1 F)
1964-27.8 C (-18.0 F)
1965-28.9 C (-20.0 F)
1966-28.3 C (-18.9 F)
1967-28.3 C (-18.9 F)
1968-35.6 C (-32.1 F)
1969-29.4 C (-20.9 F)
1970-30.0 C (-22.0 F)
1971-27.8 C (-18.0 F)
1972-26.7 C (-16.1 F)
1973-25.6 C (-14.1 F)
1974-23.9 C (-11.0 F)
1975-25.0 C (-13.0 F)
1976-30.0 C (-22.0 F)
1977-27.2 C (-17.0 F)
1978-30.6 C (-23.1 F)
1979-31.7 C (-25.1 F)
1980-25.6 C (-14.1 F)
1981-23.9 C (-11.0 F)
1982-28.3 C (-18.9 F)
1983-27.2 C (-17.0 F)
1984-31.1 C (-24.0 F)
1985-28.9 C (-20.0 F)
1986-26.1 C (-15.0 F)
1987-30.6 C (-23.1 F)
1988-28.3 C (-18.9 F)
1989-30.0 C (-22.0 F)
1990-23.3 C (-9.9 F)
1991-22.8 C (-9.0 F)
1992-22.8 C (-9.0 F)
1993-26.1 C (-15.0 F)
1994-32.8 C (-27.0 F)
1995-26.7 C (-16.1 F)
1996-32.8 C (-27.0 F)
1997-26.1 C (-15.0 F)
1998-24.4 C (-11.9 F)
1999-23.9 C (-11.0 F)
2000-25.0 C (-13.0 F)
2001-20.6 C (-5.1 F)
2002-18.9 C (-2.0 F)
2003-28.3 C (-18.9 F)
2004-27.8 C (-18.0 F)
2005-30.0 C (-22.0 F)
2006-17.8 C (0.0 F)
2007-25.6 C (-14.1 F)
2008-22.8 C (-9.0 F)
2009-25.6 C (-14.1 F)
2010-22.2 C (-8.0 F)
2011-26.7 C (-16.1 F)
2012-21.7 C (-7.1 F)
2013-22.8 C (-9.0 F)
2014-26.7 C (-16.1 F)
2015-29.4 C (-20.9 F)
2016-28.9 C (-20.0 F)
2017-22.2 C (-8.0 F)
2018-27.2 C (-17.0 F)
2019-26.7 C (-16.1 F)
2020-22.2 C (-8.0 F)
2021-19.4 C (-2.9 F)
2022-28.9 C (-20.0 F)
2023-24.4 C (-11.9 F)
2024-22.8 C (-9.0 F)
2025-26.1 C (-15.0 F)
2026-28.9 C (-20.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Norwich by year The wettest day of the year at Norwich, 1906 to 2026. The record is 154.9 mm (6.1 in) in 1935, marked on the chart; the median year is 49.8 mm (2.0 in). 050100150200192019401960198020002020Record: 154.9 mm (6.1 in) in 1935
The wettest day of the year at Norwich, 1906 to 2026. The record is 154.9 mm (6.1 in) in 1935, marked on the chart; the median year is 49.8 mm (2.0 in).
Wettest day (Rx1day) at Norwich by year
YearWettest day (Rx1day)
190649.5 mm (1.9 in)
190750.8 mm (2.0 in)
190833.5 mm (1.3 in)
190935.1 mm (1.4 in)
191038.9 mm (1.5 in)
191146.7 mm (1.8 in)
191236.3 mm (1.4 in)
191352.6 mm (2.1 in)
191446.7 mm (1.8 in)
191595.3 mm (3.8 in)
191646.7 mm (1.8 in)
191773.7 mm (2.9 in)
191841.7 mm (1.6 in)
191954.6 mm (2.1 in)
192058.9 mm (2.3 in)
192151.6 mm (2.0 in)
192248.3 mm (1.9 in)
192361.7 mm (2.4 in)
192484.8 mm (3.3 in)
192547.0 mm (1.9 in)
192647.8 mm (1.9 in)
192757.9 mm (2.3 in)
192854.9 mm (2.2 in)
192958.4 mm (2.3 in)
193031.2 mm (1.2 in)
193173.2 mm (2.9 in)
1932102.6 mm (4.0 in)
193350.0 mm (2.0 in)
193463.0 mm (2.5 in)
1935154.9 mm (6.1 in)
193638.1 mm (1.5 in)
193768.8 mm (2.7 in)
193850.3 mm (2.0 in)
193945.5 mm (1.8 in)
194093.0 mm (3.7 in)
194148.0 mm (1.9 in)
194258.4 mm (2.3 in)
194355.6 mm (2.2 in)
194440.6 mm (1.6 in)
194546.5 mm (1.8 in)
194641.9 mm (1.6 in)
194753.8 mm (2.1 in)
194849.5 mm (1.9 in)
194969.9 mm (2.8 in)
195040.9 mm (1.6 in)
195130.0 mm (1.2 in)
195279.0 mm (3.1 in)
195332.8 mm (1.3 in)
195449.8 mm (2.0 in)
195538.1 mm (1.5 in)
195641.9 mm (1.6 in)
195735.6 mm (1.4 in)
195840.6 mm (1.6 in)
195960.2 mm (2.4 in)
196066.8 mm (2.6 in)
196143.9 mm (1.7 in)
196251.1 mm (2.0 in)
196338.4 mm (1.5 in)
196434.8 mm (1.4 in)
196526.7 mm (1.1 in)
196646.2 mm (1.8 in)
196748.5 mm (1.9 in)
196846.7 mm (1.8 in)
196952.6 mm (2.1 in)
197032.5 mm (1.3 in)
197139.1 mm (1.5 in)
197268.1 mm (2.7 in)
197345.2 mm (1.8 in)
197434.8 mm (1.4 in)
197537.3 mm (1.5 in)
197663.5 mm (2.5 in)
197754.9 mm (2.2 in)
197858.4 mm (2.3 in)
197953.3 mm (2.1 in)
198094.7 mm (3.7 in)
198142.2 mm (1.7 in)
198238.9 mm (1.5 in)
198371.6 mm (2.8 in)
198446.0 mm (1.8 in)
198549.8 mm (2.0 in)
198647.8 mm (1.9 in)
198739.9 mm (1.6 in)
198843.9 mm (1.7 in)
198946.7 mm (1.8 in)
199068.8 mm (2.7 in)
199137.8 mm (1.5 in)
199244.2 mm (1.7 in)
199339.6 mm (1.6 in)
199468.8 mm (2.7 in)
199547.0 mm (1.9 in)
199668.1 mm (2.7 in)
199725.4 mm (1.0 in)
199862.5 mm (2.5 in)
199990.7 mm (3.6 in)
200059.2 mm (2.3 in)
200156.9 mm (2.2 in)
200285.9 mm (3.4 in)
200350.8 mm (2.0 in)
200478.7 mm (3.1 in)
200563.8 mm (2.5 in)
200662.5 mm (2.5 in)
200749.8 mm (2.0 in)
200861.7 mm (2.4 in)
200944.2 mm (1.7 in)
201088.4 mm (3.5 in)
2011145.3 mm (5.7 in)
201248.3 mm (1.9 in)
201388.4 mm (3.5 in)
201499.1 mm (3.9 in)
201548.0 mm (1.9 in)
201665.5 mm (2.6 in)
201750.8 mm (2.0 in)
201883.8 mm (3.3 in)
201945.2 mm (1.8 in)
202041.4 mm (1.6 in)
202140.9 mm (1.6 in)
202245.0 mm (1.8 in)
202363.5 mm (2.5 in)
202453.8 mm (2.1 in)
2025102.6 mm (4.0 in)
202633.8 mm (1.3 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Norwich by year The wettest five days of the year at Norwich, 1906 to 2026. The record is 248.3 mm (9.8 in) in 1935, marked on the chart; the median year is 78.3 mm (3.1 in). 0100200300192019401960198020002020Record: 248.3 mm (9.8 in) in 1935
The wettest five days of the year at Norwich, 1906 to 2026. The record is 248.3 mm (9.8 in) in 1935, marked on the chart; the median year is 78.3 mm (3.1 in).
Wettest five days (Rx5day) at Norwich by year
YearWettest five days (Rx5day)
190670.7 mm (2.8 in)
1907104.7 mm (4.1 in)
190848.3 mm (1.9 in)
190959.7 mm (2.4 in)
191059.6 mm (2.3 in)
191160.4 mm (2.4 in)
191249.5 mm (1.9 in)
1913103.2 mm (4.1 in)
191471.6 mm (2.8 in)
1915126.3 mm (5.0 in)
191655.6 mm (2.2 in)
191779.9 mm (3.1 in)
191856.3 mm (2.2 in)
191969.1 mm (2.7 in)
192080.1 mm (3.2 in)
192159.5 mm (2.3 in)
1922101.2 mm (4.0 in)
192374.9 mm (2.9 in)
1924120.4 mm (4.7 in)
192567.6 mm (2.7 in)
192692.5 mm (3.6 in)
192783.7 mm (3.3 in)
192883.4 mm (3.3 in)
192978.7 mm (3.1 in)
193046.4 mm (1.8 in)
193184.9 mm (3.3 in)
1932134.7 mm (5.3 in)
193385.0 mm (3.3 in)
193470.1 mm (2.8 in)
1935248.3 mm (9.8 in)
193673.9 mm (2.9 in)
193787.4 mm (3.4 in)
193882.2 mm (3.2 in)
193961.3 mm (2.4 in)
1940110.2 mm (4.3 in)
194176.7 mm (3.0 in)
1942113.1 mm (4.5 in)
1943113.1 mm (4.5 in)
194475.1 mm (3.0 in)
194563.2 mm (2.5 in)
194677.5 mm (3.1 in)
194770.3 mm (2.8 in)
194856.9 mm (2.2 in)
1949108.3 mm (4.3 in)
1950100.9 mm (4.0 in)
195153.9 mm (2.1 in)
195284.6 mm (3.3 in)
195360.5 mm (2.4 in)
195484.6 mm (3.3 in)
195594.2 mm (3.7 in)
195675.5 mm (3.0 in)
195770.7 mm (2.8 in)
195879.7 mm (3.1 in)
195972.9 mm (2.9 in)
1960116.1 mm (4.6 in)
196161.8 mm (2.4 in)
196266.3 mm (2.6 in)
196354.7 mm (2.2 in)
196468.8 mm (2.7 in)
196549.8 mm (2.0 in)
196662.8 mm (2.5 in)
196768.9 mm (2.7 in)
196864.6 mm (2.5 in)
196978.3 mm (3.1 in)
197059.5 mm (2.3 in)
197156.4 mm (2.2 in)
1972109.9 mm (4.3 in)
197371.9 mm (2.8 in)
197467.0 mm (2.6 in)
1975106.4 mm (4.2 in)
197674.4 mm (2.9 in)
1977121.9 mm (4.8 in)
197887.9 mm (3.5 in)
197999.0 mm (3.9 in)
1980111.0 mm (4.4 in)
198168.3 mm (2.7 in)
198265.0 mm (2.6 in)
1983103.6 mm (4.1 in)
198476.0 mm (3.0 in)
1985105.9 mm (4.2 in)
198694.3 mm (3.7 in)
198754.6 mm (2.1 in)
198890.4 mm (3.6 in)
198974.0 mm (2.9 in)
199076.5 mm (3.0 in)
199165.3 mm (2.6 in)
199270.6 mm (2.8 in)
199356.1 mm (2.2 in)
1994102.5 mm (4.0 in)
199574.2 mm (2.9 in)
199680.0 mm (3.1 in)
199743.0 mm (1.7 in)
199870.9 mm (2.8 in)
1999105.8 mm (4.2 in)
2000100.3 mm (3.9 in)
200173.2 mm (2.9 in)
2002103.0 mm (4.1 in)
200387.6 mm (3.4 in)
200482.3 mm (3.2 in)
2005118.6 mm (4.7 in)
200671.4 mm (2.8 in)
200768.3 mm (2.7 in)
200893.7 mm (3.7 in)
200994.8 mm (3.7 in)
2010117.9 mm (4.6 in)
2011192.3 mm (7.6 in)
201296.2 mm (3.8 in)
2013158.5 mm (6.2 in)
2014107.5 mm (4.2 in)
201583.6 mm (3.3 in)
2016104.1 mm (4.1 in)
201786.7 mm (3.4 in)
201890.1 mm (3.5 in)
201975.5 mm (3.0 in)
202056.7 mm (2.2 in)
202181.9 mm (3.2 in)
202263.5 mm (2.5 in)
202384.9 mm (3.3 in)
202480.7 mm (3.2 in)
2025110.2 mm (4.3 in)
202650.6 mm (2.0 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Norwich by year The longest dry spell of the year at Norwich, 1906 to 2026. The record is 36 days in 1924, marked on the chart; the median year is 14 days. 010203040192019401960198020002020Record: 36 days in 1924
The longest dry spell of the year at Norwich, 1906 to 2026. The record is 36 days in 1924, marked on the chart; the median year is 14 days.
Longest dry spell (CDD) at Norwich by year
YearLongest dry spell (CDD)
190619 days
190710 days
190822 days
190921 days
191024 days
191130 days
191220 days
191316 days
191414 days
191516 days
191619 days
191718 days
191819 days
191914 days
192011 days
192113 days
192221 days
192317 days
192436 days
192512 days
192616 days
192714 days
192812 days
192915 days
193011 days
193114 days
193212 days
193312 days
193419 days
193517 days
193614 days
19379 days
193822 days
193920 days
194011 days
194118 days
194219 days
194314 days
194417 days
194510 days
194619 days
194728 days
194813 days
194920 days
195011 days
195112 days
195212 days
195315 days
195414 days
195514 days
195614 days
195712 days
195811 days
195911 days
196012 days
196118 days
196212 days
196327 days
196415 days
196510 days
196618 days
196715 days
196813 days
196913 days
197016 days
197113 days
197211 days
197316 days
197412 days
197513 days
197616 days
197714 days
197817 days
197911 days
198023 days
198110 days
198212 days
198323 days
198414 days
198513 days
198615 days
198723 days
198813 days
198913 days
199011 days
199113 days
199212 days
19939 days
199414 days
199515 days
199611 days
199720 days
199813 days
199919 days
200012 days
200120 days
200211 days
200312 days
200412 days
200513 days
200611 days
200713 days
200814 days
200913 days
201015 days
201111 days
201220 days
201311 days
201417 days
201518 days
201615 days
201714 days
201810 days
20199 days
202013 days
202116 days
202210 days
202312 days
202413 days
202518 days
202615 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

106 years with a frost

Across 106 years with a frost, the median last spring frost at Norwich falls on 18 May and the median first autumn frost on 28 September, which leaves a median of 132 days between them.

In 1993 to 2025 the median growing season was 151 days. That is 20 days more than in 1907 to 1942.

Fitted over all years, the growing season changes by +1.9 days per decade at this station.

Frost dates and growing season at Norwich
MeasureMedian, all yearsEarliest period (1907 to 1942)Recent period (1993 to 2025)Recent against earliestFitted trend
Last spring frost18 May18 May15 May3 days earlier-0.3 days per decade
First autumn frost28 September26 September10 October14 days later+1.6 days per decade
Growing days132 days131 days151 days20 days more+1.9 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

113 years, 1908 to 2025

A day with at least 50.7 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 134.6 mm (5.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Norwich: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years50.7 mm (2.0 in)
5 years67.6 mm (2.7 in)
10 years80.7 mm (3.2 in)
25 years99.9 mm (3.9 in)
50 years116.3 mm (4.6 in)
100 years134.6 mm (5.3 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 113 years of values from 1908 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: 154.9 mm (6.1 in) in 1935; 145.3 mm (5.7 in) in 2011; 102.6 mm (4.0 in) in 2025.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Norwich, at 1957. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1957 ran 0.3 C (0.5 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Norwich, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
1957-0.3-0.5possible5

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, Norwich had a mean temperature of 8.0 C (46.4 F) and 1,155.2 mm (45.5 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Corry (United States, 345 km away), Worcester (United States, 301 km away) and Meadville 1 S (United States, 396 km away).

Climate twins of Norwich: 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
CorryUnited States345 km (214 mi)8.2 C (46.8 F)1,198.2 mm (47.2 in)0.71
Meadville 1 SUnited States396 km (246 mi)8.3 C (46.9 F)1,134.5 mm (44.7 in)0.72
WorcesterUnited States301 km (187 mi)8.3 C (46.9 F)1,213.2 mm (47.8 in)0.72

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 Norwich standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Norwich 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-15).