Built 2026-10-16 (16 October 2026)

Seward AP Weather Records (USW00026438)

Record envelope, standing records and threshold days for Seward AP (USW00026438), Alaska, United States, with 119 years of record.

Key Facts for Seward AP

  • Seward AP (USW00026438) is a weather station in Alaska, United States at 60.13 latitude and -149.42 longitude, 4 m (14 ft) above sea level.
  • The station reports from 1908 to 2026, 119 years of record.
  • 1,464 records set at Seward AP still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Seward AP set a daily record high minimum temperature of 12.2 C (54.0 F) on 10 September 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Alaska, United States, 60.13 latitude, -149.42 longitude.
  • Elevation: 4 m (14 ft).
  • Period of record: 1908 to 2026, 119 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

5 days at or beyond a record
Daily record high and record low at Seward AP, with 2026 drawn through them The band shows the record high and record low for each calendar day at Seward AP. The lines show the 2026 daily maximum and minimum. 5 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 Seward AP. The lines show the 2026 daily maximum and minimum. 5 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Seward AP, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan16.1 C (61.0 F)-28.9 C (-20.0 F)7.2 C (45.0 F)-18.9 C (-2.0 F)
Feb13.3 C (55.9 F)-27.2 C (-17.0 F)8.3 C (46.9 F)-16.7 C (1.9 F)
Mar19.4 C (66.9 F)-21.7 C (-7.1 F)6.1 C (43.0 F)-16.7 C (1.9 F)
Apr23.3 C (73.9 F)-18.3 C (-0.9 F)10.6 C (51.1 F)-5.6 C (21.9 F)
May26.7 C (80.1 F)-10.0 C (14.0 F)12.8 C (55.0 F)-1.1 C (30.0 F)
Jun31.1 C (88.0 F)-1.1 C (30.0 F)26.1 C (79.0 F)3.3 C (37.9 F)
Jul31.1 C (88.0 F)-1.1 C (30.0 F)24.4 C (75.9 F)4.4 C (39.9 F)
Aug35.0 C (95.0 F)-1.1 C (30.0 F)22.8 C (73.0 F)6.1 C (43.0 F)
Sep28.9 C (84.0 F)-3.3 C (26.1 F)20.6 C (69.1 F)1.7 C (35.1 F)
Oct18.3 C (64.9 F)-13.3 C (8.1 F)12.2 C (54.0 F)-1.1 C (30.0 F)
Nov14.4 C (57.9 F)-20.0 C (-4.0 F)n/an/a
Dec11.7 C (53.1 F)-24.4 C (-11.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Seward AP by the year they were set 1,464 records at Seward AP still stand. 1915 holds the most, with 39. 0102030401908: 161909: 181910: 241911: 351912: 251913: 81914: 221915: 391916: 171917: 261918: 251919: 161920: 211921: 61922: 91923: 91924: 221925: 101929: 81930: 71931: 151932: 251933: 231934: 191935: 141936: 161937: 221938: 161939: 61940: 111941: 151942: 311943: 241944: 201945: 131946: 121947: 191948: 261949: 21950: 61951: 91952: 81953: 121954: 91955: 91956: 191957: 161958: 101959: 31960: 41961: 141962: 81963: 151964: 171965: 201966: 61967: 91968: 81969: 61970: 111971: 241972: 131973: 81974: 21975: 211976: 101977: 171979: 131980: 91981: 81982: 141983: 71984: 41985: 201986: 181987: 91988: 31989: 111990: 161991: 51992: 141993: 161994: 131995: 151996: 91997: 91998: 71999: 122000: 32001: 52002: 212003: 122004: 152005: 102006: 92007: 32008: 22009: 102010: 72011: 32012: 12013: 82014: 142015: 172016: 162017: 52018: 102019: 172020: 32021: 82022: 52023: 22024: 52025: 102026: 51908192019351947195919711984199620082020
1,464 records at Seward AP still stand. 1915 holds the most, with 39.
Standing records at Seward AP by the year they were set
Year setStanding records
190816
190918
191024
191135
191225
19138
191422
191539
191617
191726
191825
191916
192021
19216
19229
19239
192422
192510
19298
19307
193115
193225
193323
193419
193514
193616
193722
193816
19396
194011
194115
194231
194324
194420
194513
194612
194719
194826
19492
19506
19519
19528
195312
19549
19559
195619
195716
195810
19593
19604
196114
19628
196315
196417
196520
19666
19679
19688
19696
197011
197124
197213
19738
19742
197521
197610
197717
197913
19809
19818
198214
19837
19844
198520
198618
19879
19883
198911
199016
19915
199214
199316
199413
199515
19969
19979
19987
199912
20003
20015
200221
200312
200415
200510
20069
20073
20082
200910
20107
20113
20121
20138
201414
201517
201616
20175
201810
201917
20203
20218
20225
20232
20245
202510
20265

All-Time Record Progression

4 new records
When Seward AP set new all-time records 4 all-time records were set at Seward AP between 12 August 1966 and 12 February 1996. Each dot is a new record. Record high maximum temperatureRecord daily precipitationRecord low maximum temperatureRecord snow depth12 August 1966: Record high maximum temperature 35.0 C (95.0 F)10 October 1986: Record daily precipitation 382.3 mm (15.1 in)29 January 1989: Record low maximum temperature -21.7 C (-7.1 F)12 February 1996: Record snow depth 127.0 cm (50.0 in)197019751980198519901995
4 all-time records were set at Seward AP between 12 August 1966 and 12 February 1996. Each dot is a new record.
When Seward AP set new all-time records
DateKindDetail
1966-08-12Record high maximum temperatureRecord high maximum temperature 35.0 C (95.0 F)
1986-10-10Record daily precipitationRecord daily precipitation 382.3 mm (15.1 in)
1989-01-29Record low maximum temperatureRecord low maximum temperature -21.7 C (-7.1 F)
1996-02-12Record snow depthRecord snow depth 127.0 cm (50.0 in)

Wettest Day of Each Month

Oct: 382.3 mm (15.1 in)
Record daily precipitation for each month at Seward AP The wettest day on record for each calendar month at Seward AP. The most was 382.3 mm (15.1 in) on 10 October 1986. 0100200300400 Jan: 104.1 mm (4.1 in), 3 January 1986 Jan Feb: 103.9 mm (4.1 in), 10 February 1996 Feb Mar: 102.1 mm (4.0 in), 15 March 1935 Mar Apr: 138.4 mm (5.4 in), 7 April 2004 Apr May: 129.8 mm (5.1 in), 8 May 1985 May Jun: 89.7 mm (3.5 in), 7 June 1965 Jun Jul: 81.3 mm (3.2 in), 20 July 1935 Jul Aug: 105.9 mm (4.2 in), 25 August 1989 Aug Sep: 249.2 mm (9.8 in), 20 September 1995 Sep Oct: 382.3 mm (15.1 in), 10 October 1986 Oct Nov: 138.4 mm (5.4 in), 8 November 1908 Nov Dec: 232.9 mm (9.2 in), 5 December 1934 Dec
The wettest day on record for each calendar month at Seward AP. The most was 382.3 mm (15.1 in) on 10 October 1986.
Record daily precipitation for each month at Seward AP
MonthRecord daily precipitation (mm)Date
Jan104.1 mm (4.1 in)3 January 1986
Feb103.9 mm (4.1 in)10 February 1996
Mar102.1 mm (4.0 in)15 March 1935
Apr138.4 mm (5.4 in)7 April 2004
May129.8 mm (5.1 in)8 May 1985
Jun89.7 mm (3.5 in)7 June 1965
Jul81.3 mm (3.2 in)20 July 1935
Aug105.9 mm (4.2 in)25 August 1989
Sep249.2 mm (9.8 in)20 September 1995
Oct382.3 mm (15.1 in)10 October 1986
Nov138.4 mm (5.4 in)8 November 1908
Dec232.9 mm (9.2 in)5 December 1934

Period of Record Coverage

1908 to 2026
Days with data per year at Seward AP 116 years of record at Seward AP, 1908 to 2026. 9 years have data for under 90 percent of days and are left out of rankings: 1925, 1929, 1937, 1938, 1939, 1949, 1997, 2025 and others. 1908: 333 of 366 days1909: 356 of 365 days1910: 359 of 365 days1911: 360 of 365 days1912: 360 of 366 days1913: 364 of 365 days1914: 358 of 365 days1915: 364 of 365 days1916: 365 of 366 days1917: 360 of 365 days1918: 345 of 365 days1919: 362 of 365 days1920: 364 of 366 days1921: 334 of 365 days1922: 363 of 365 days1923: 364 of 365 days1924: 365 of 366 days1925: 120 of 365 days1929: 120 of 365 days1930: 355 of 365 days1931: 355 of 365 days1932: 346 of 366 days1933: 359 of 365 days1934: 359 of 365 days1935: 362 of 365 days1936: 366 of 366 days1937: 326 of 365 days1938: 219 of 365 days1939: 305 of 365 days1940: 358 of 366 days1941: 360 of 365 days1942: 361 of 365 days1943: 364 of 365 days1944: 362 of 366 days1945: 363 of 365 days1946: 365 of 365 days1947: 362 of 365 days1948: 356 of 366 days1949: 121 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 363 of 366 days1953: 363 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 364 of 366 days1957: 365 of 365 days1958: 365 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 363 of 365 days1962: 365 of 365 days1963: 364 of 365 days1964: 357 of 366 days1965: 364 of 365 days1966: 364 of 365 days1967: 365 of 365 days1968: 365 of 366 days1969: 364 of 365 days1970: 357 of 365 days1971: 349 of 365 days1972: 350 of 366 days1973: 349 of 365 days1974: 361 of 365 days1975: 355 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 331 of 365 days1980: 364 of 366 days1981: 362 of 365 days1982: 359 of 365 days1983: 365 of 365 days1984: 364 of 366 days1985: 361 of 365 days1986: 364 of 365 days1987: 350 of 365 days1988: 364 of 366 days1989: 360 of 365 days1990: 356 of 365 days1991: 332 of 365 days1992: 363 of 366 days1993: 357 of 365 days1994: 354 of 365 days1995: 350 of 365 days1996: 359 of 366 days1997: 316 of 365 days1998: 352 of 365 days1999: 352 of 365 days2000: 352 of 366 days2001: 356 of 365 days2002: 355 of 365 days2003: 353 of 365 days2004: 354 of 366 days2005: 358 of 365 days2006: 353 of 365 days2007: 356 of 365 days2008: 359 of 366 days2009: 365 of 365 days2010: 359 of 365 days2011: 365 of 365 days2012: 359 of 366 days2013: 365 of 365 days2014: 360 of 365 days2015: 365 of 365 days2016: 366 of 366 days2017: 355 of 365 days2018: 338 of 365 days2019: 363 of 365 days2020: 363 of 366 days2021: 359 of 365 days2022: 362 of 365 days2023: 363 of 365 days2024: 362 of 366 days2025: 324 of 365 days2026: 271 of 365 days19201935195019651980199520102025
116 years of record at Seward AP, 1908 to 2026. 9 years have data for under 90 percent of days and are left out of rankings: 1925, 1929, 1937, 1938, 1939, 1949, 1997, 2025 and others.
Days with data per year at Seward AP
YearDays with dataShare of yearComplete
190833391%Yes
190935698%Yes
191035998%Yes
191136099%Yes
191236098%Yes
1913364100%Yes
191435898%Yes
1915364100%Yes
1916365100%Yes
191736099%Yes
191834595%Yes
191936299%Yes
192036499%Yes
192133492%Yes
192236399%Yes
1923364100%Yes
1924365100%Yes
192512033%No
192912033%No
193035597%Yes
193135597%Yes
193234695%Yes
193335998%Yes
193435998%Yes
193536299%Yes
1936366100%Yes
193732689%No
193821960%No
193930584%No
194035898%Yes
194136099%Yes
194236199%Yes
1943364100%Yes
194436299%Yes
194536399%Yes
1946365100%Yes
194736299%Yes
194835697%Yes
194912133%No
1950365100%Yes
1951365100%Yes
195236399%Yes
195336399%Yes
1954365100%Yes
1955365100%Yes
195636499%Yes
1957365100%Yes
1958365100%Yes
1959365100%Yes
1960366100%Yes
196136399%Yes
1962365100%Yes
1963364100%Yes
196435798%Yes
1965364100%Yes
1966364100%Yes
1967365100%Yes
1968365100%Yes
1969364100%Yes
197035798%Yes
197134996%Yes
197235096%Yes
197334996%Yes
197436199%Yes
197535597%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
197933191%Yes
198036499%Yes
198136299%Yes
198235998%Yes
1983365100%Yes
198436499%Yes
198536199%Yes
1986364100%Yes
198735096%Yes
198836499%Yes
198936099%Yes
199035698%Yes
199133291%Yes
199236399%Yes
199335798%Yes
199435497%Yes
199535096%Yes
199635998%Yes
199731687%No
199835296%Yes
199935296%Yes
200035296%Yes
200135698%Yes
200235597%Yes
200335397%Yes
200435497%Yes
200535898%Yes
200635397%Yes
200735698%Yes
200835998%Yes
2009365100%Yes
201035998%Yes
2011365100%Yes
201235998%Yes
2013365100%Yes
201436099%Yes
2015365100%Yes
2016366100%Yes
201735597%Yes
201833893%Yes
201936399%Yes
202036399%Yes
202135998%Yes
202236299%Yes
202336399%Yes
202436299%Yes
202532489%No
202627174%No

Latest Records

20
Latest records at Seward AP
DateStationRecordValueBeat old record byOld record stoodSignificance
10 September 2026Seward AP, USdaily high min (Provisional)12.2 C (54.0 F)1.1 C (2.0 F)116 years43 of 100 (Notable)
9 September 2026Seward AP, USdaily high min (Provisional)12.2 C (54.0 F)1.1 C (2.0 F)116 years43 of 100 (Notable)
21 July 2026Seward AP, USdaily low max10.6 C (51.1 F)1.1 C (2.0 F)117 years43 of 100 (Notable)
19 July 2026Seward AP, USdaily rain67.3 mm (2.6 in)19.0 mm (0.7 in)24 years40 of 100 (Notable)
18 July 2026Seward AP, USdaily low max (Tie)11.1 C (52.0 F)tie92 years9 of 100 (Routine)
12 July 2026Seward AP, USdaily rain21.3 mm (0.8 in)2.2 mm (0.09 in)56 years20 of 100 (Routine)
1 July 2026Seward AP, USdaily low min (Tie)4.4 C (39.9 F)tie95 years9 of 100 (Routine)
4 June 2026Seward AP, USdaily high max26.1 C (79.0 F)0.5 C (0.9 F)4 years12 of 100 (Routine)
24 May 2026Seward AP, USdaily low min-1.1 C (30.0 F)0.6 C (1.1 F)15 years16 of 100 (Routine)
1 May 2026Seward AP, USdaily rain61.2 mm (2.4 in)9.4 mm (0.37 in)52 years34 of 100 (Routine)
19 March 2026Seward AP, USdaily low max-7.8 C (18.0 F)0.6 C (1.1 F)67 years31 of 100 (Routine)
26 February 2026Seward AP, USdaily low min (Tie)-16.7 C (1.9 F)tie90 years9 of 100 (Routine)
4 February 2026Seward AP, USdaily high min (Tie)2.8 C (37.0 F)tie48 years6 of 100 (Routine)
28 January 2026Seward AP, USdaily high max (Tie)6.1 C (43.0 F)tie12 years3 of 100 (Routine)
15 January 2026Seward AP, USdaily rain52.1 mm (2.1 in)15.3 mm (0.6 in)11 years23 of 100 (Routine)
8 January 2026Seward AP, USdaily low max-15.0 C (5.0 F)1.7 C (3.1 F)43 years24 of 100 (Routine)
23 July 2025Seward AP, USdaily high min14.4 C (57.9 F)0.5 C (0.9 F)112 years42 of 100 (Notable)
19 June 2025Seward AP, USdaily high max26.1 C (79.0 F)3.3 C (5.9 F)20 years24 of 100 (Routine)
7 May 2025Seward AP, USdaily low min-1.6 C (29.1 F)0.5 C (0.9 F)103 years42 of 100 (Notable)
5 April 2025Seward AP, USdaily high min3.9 C (39.0 F)0.6 C (1.1 F)111 years42 of 100 (Notable)

Climate Trend

98 complete years, 1909 to 2024
Annual mean temperature at Seward AP as warming stripes, 1909 to 2024 One stripe for each of 98 complete years at Seward AP, 1909 to 2024. Blue stripes are years cooler than the station's own mean of 4.3 C (39.8 F); red stripes are warmer. The coolest year was 1933, at 2.3 C (36.1 F), and the warmest was 2016, at 6.8 C (44.2 F). The strongest colour marks a difference of 2.5 C (4.5 F). 1909: 2.7 C, -1.6 C from the station mean1910: 3.1 C, -1.2 C from the station mean1913: 4.1 C, -0.2 C from the station mean1914: 5.3 C, +1.0 C from the station mean1915: 5.8 C, +1.4 C from the station mean1916: 3.2 C, -1.1 C from the station mean1917: 2.8 C, -1.6 C from the station mean1919: 3.5 C, -0.8 C from the station mean1920: 3.2 C, -1.2 C from the station mean1922: 3.6 C, -0.7 C from the station mean1923: 4.9 C, +0.6 C from the station mean1924: 4.2 C, -0.1 C from the station mean1930: 3.9 C, -0.4 C from the station mean1931: 4.5 C, +0.2 C from the station mean1933: 2.3 C, -2.1 C from the station mean1934: 3.5 C, -0.8 C from the station mean1935: 3.9 C, -0.4 C from the station mean1936: 5.1 C, +0.8 C from the station mean1940: 5.1 C, +0.8 C from the station mean1941: 5.0 C, +0.6 C from the station mean1942: 4.6 C, +0.2 C from the station mean1943: 4.5 C, +0.1 C from the station mean1944: 5.0 C, +0.6 C from the station mean1945: 4.6 C, +0.2 C from the station mean1946: 3.7 C, -0.6 C from the station mean1947: 4.6 C, +0.3 C from the station mean1948: 3.5 C, -0.9 C from the station mean1950: 3.5 C, -0.8 C from the station mean1951: 3.6 C, -0.8 C from the station mean1952: 4.4 C, 0.0 C from the station mean1953: 4.4 C, +0.1 C from the station mean1954: 3.8 C, -0.5 C from the station mean1955: 3.2 C, -1.1 C from the station mean1956: 2.5 C, -1.8 C from the station mean1957: 5.5 C, +1.2 C from the station mean1958: 4.9 C, +0.6 C from the station mean1959: 4.6 C, +0.2 C from the station mean1960: 5.2 C, +0.8 C from the station mean1961: 3.5 C, -0.8 C from the station mean1962: 4.6 C, +0.3 C from the station mean1963: 5.2 C, +0.9 C from the station mean1964: 3.9 C, -0.5 C from the station mean1965: 3.8 C, -0.5 C from the station mean1966: 3.6 C, -0.7 C from the station mean1967: 4.5 C, +0.2 C from the station mean1968: 4.5 C, +0.2 C from the station mean1969: 4.7 C, +0.4 C from the station mean1970: 4.1 C, -0.2 C from the station mean1971: 2.4 C, -2.0 C from the station mean1972: 2.7 C, -1.6 C from the station mean1973: 3.0 C, -1.3 C from the station mean1974: 4.1 C, -0.3 C from the station mean1975: 2.9 C, -1.4 C from the station mean1976: 4.2 C, -0.1 C from the station mean1977: 4.6 C, +0.3 C from the station mean1978: 5.0 C, +0.7 C from the station mean1980: 3.9 C, -0.4 C from the station mean1981: 5.2 C, +0.8 C from the station mean1982: 3.7 C, -0.7 C from the station mean1983: 5.3 C, +1.0 C from the station mean1984: 5.1 C, +0.8 C from the station mean1985: 4.2 C, -0.1 C from the station mean1986: 5.2 C, +0.9 C from the station mean1987: 5.5 C, +1.2 C from the station mean1988: 5.2 C, +0.9 C from the station mean1989: 4.4 C, +0.1 C from the station mean1990: 4.2 C, -0.2 C from the station mean1992: 4.0 C, -0.3 C from the station mean1993: 5.9 C, +1.5 C from the station mean1994: 4.2 C, -0.1 C from the station mean1995: 4.6 C, +0.3 C from the station mean1996: 4.1 C, -0.2 C from the station mean1998: 4.9 C, +0.5 C from the station mean1999: 3.6 C, -0.8 C from the station mean2000: 5.5 C, +1.2 C from the station mean2001: 4.9 C, +0.6 C from the station mean2002: 5.4 C, +1.1 C from the station mean2003: 5.4 C, +1.1 C from the station mean2004: 5.4 C, +1.0 C from the station mean2005: 5.8 C, +1.5 C from the station mean2006: 3.8 C, -0.5 C from the station mean2007: 4.1 C, -0.3 C from the station mean2008: 3.0 C, -1.4 C from the station mean2009: 3.7 C, -0.6 C from the station mean2010: 4.5 C, +0.2 C from the station mean2011: 3.6 C, -0.7 C from the station mean2012: 3.1 C, -1.3 C from the station mean2013: 5.0 C, +0.7 C from the station mean2014: 6.0 C, +1.6 C from the station mean2015: 5.9 C, +1.6 C from the station mean2016: 6.8 C, +2.4 C from the station mean2017: 4.3 C, 0.0 C from the station mean2019: 6.5 C, +2.2 C from the station mean2020: 4.4 C, +0.1 C from the station mean2021: 3.9 C, -0.5 C from the station mean2022: 5.1 C, +0.8 C from the station mean2023: 4.3 C, 0.0 C from the station mean2024: 3.8 C, -0.5 C from the station mean190919201930194019501960197019801990200020102020
One stripe for each of 98 complete years at Seward AP, 1909 to 2024. Blue stripes are years cooler than the station's own mean of 4.3 C (39.8 F); red stripes are warmer. The coolest year was 1933, at 2.3 C (36.1 F), and the warmest was 2016, at 6.8 C (44.2 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Seward AP as warming stripes, 1909 to 2024
YearAnnual mean temperatureDifference from the station mean
19092.7 C-1.64 C
19103.1 C-1.22 C
19134.1 C-0.19 C
19145.3 C+1.00 C
19155.8 C+1.43 C
19163.2 C-1.13 C
19172.8 C-1.57 C
19193.5 C-0.79 C
19203.2 C-1.18 C
19223.6 C-0.72 C
19234.9 C+0.60 C
19244.2 C-0.14 C
19303.9 C-0.44 C
19314.5 C+0.18 C
19332.3 C-2.06 C
19343.5 C-0.80 C
19353.9 C-0.40 C
19365.1 C+0.79 C
19405.1 C+0.81 C
19415.0 C+0.64 C
19424.6 C+0.23 C
19434.5 C+0.14 C
19445.0 C+0.62 C
19454.6 C+0.23 C
19463.7 C-0.65 C
19474.6 C+0.29 C
19483.5 C-0.87 C
19503.5 C-0.80 C
19513.6 C-0.78 C
19524.4 C+0.02 C
19534.4 C+0.09 C
19543.8 C-0.53 C
19553.2 C-1.10 C
19562.5 C-1.83 C
19575.5 C+1.17 C
19584.9 C+0.55 C
19594.6 C+0.23 C
19605.2 C+0.82 C
19613.5 C-0.79 C
19624.6 C+0.26 C
19635.2 C+0.85 C
19643.9 C-0.46 C
19653.8 C-0.53 C
19663.6 C-0.75 C
19674.5 C+0.20 C
19684.5 C+0.20 C
19694.7 C+0.37 C
19704.1 C-0.22 C
19712.4 C-1.97 C
19722.7 C-1.65 C
19733.0 C-1.35 C
19744.1 C-0.28 C
19752.9 C-1.41 C
19764.2 C-0.09 C
19774.6 C+0.27 C
19785.0 C+0.66 C
19803.9 C-0.44 C
19815.2 C+0.82 C
19823.7 C-0.66 C
19835.3 C+0.97 C
19845.1 C+0.80 C
19854.2 C-0.09 C
19865.2 C+0.86 C
19875.5 C+1.21 C
19885.2 C+0.86 C
19894.4 C+0.08 C
19904.2 C-0.17 C
19924.0 C-0.32 C
19935.9 C+1.53 C
19944.2 C-0.09 C
19954.6 C+0.29 C
19964.1 C-0.20 C
19984.9 C+0.54 C
19993.6 C-0.78 C
20005.5 C+1.15 C
20014.9 C+0.55 C
20025.4 C+1.07 C
20035.4 C+1.07 C
20045.4 C+1.03 C
20055.8 C+1.49 C
20063.8 C-0.52 C
20074.1 C-0.28 C
20083.0 C-1.36 C
20093.7 C-0.62 C
20104.5 C+0.15 C
20113.6 C-0.69 C
20123.1 C-1.27 C
20135.0 C+0.67 C
20146.0 C+1.64 C
20155.9 C+1.60 C
20166.8 C+2.44 C
20174.3 C-0.04 C
20196.5 C+2.16 C
20204.4 C+0.09 C
20213.9 C-0.47 C
20225.1 C+0.75 C
20234.3 C-0.03 C
20243.8 C-0.49 C

The annual mean temperature here has risen by 0.09 C (0.03 to 0.14) per decade over 1909 to 2024. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 98 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Seward AP
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.09 C (0.03 to 0.14) per decade0.2 F (0.1 to 0.3) per decade1909 to 202498Rise
Mean daily maximum0.02 C (-0.04 to 0.09) per decade0.04 F (-0.07 to 0.16) per decade1909 to 202498Not clearly different from zero
Mean daily minimum0.2 C (0.1 to 0.2) per decade0.3 F (0.2 to 0.4) per decade1909 to 202498Rise

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

1908 to 2026
Yearly extremes at Seward AP: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)35.0 C (95.0 F)196626.1 C (79.0 F)116
Coldest night (TNn)-28.9 C (-20.0 F)1919-18.9 C (-2.0 F)116
Wettest day (Rx1day)382.3 mm (15.1 in)198676.5 mm (3.0 in)116
Wettest five days (Rx5day)517.1 mm (20.4 in)1986167.3 mm (6.6 in)116
Longest dry spell (CDD)49 days196720 days116

Hottest day (TXx)

Hottest day (TXx) at Seward AP by year The hottest day of the year at Seward AP, 1908 to 2026. The record is 35.0 C (95.0 F) in 1966, marked on the chart; the median year is 26.1 C (79.0 F). 10203040192019401960198020002020Record: 35.0 C (95.0 F) in 1966
The hottest day of the year at Seward AP, 1908 to 2026. The record is 35.0 C (95.0 F) in 1966, marked on the chart; the median year is 26.1 C (79.0 F).
Hottest day (TXx) at Seward AP by year
YearHottest day (TXx)
190826.7 C (80.1 F)
190928.9 C (84.0 F)
191028.9 C (84.0 F)
191129.4 C (84.9 F)
191227.8 C (82.0 F)
191327.2 C (81.0 F)
191429.4 C (84.9 F)
191531.1 C (88.0 F)
191625.6 C (78.1 F)
191725.6 C (78.1 F)
191828.3 C (82.9 F)
191927.2 C (81.0 F)
192023.9 C (75.0 F)
192122.8 C (73.0 F)
192223.9 C (75.0 F)
192325.6 C (78.1 F)
192425.0 C (77.0 F)
192510.0 C (50.0 F)
192920.0 C (68.0 F)
193025.6 C (78.1 F)
193122.8 C (73.0 F)
193220.6 C (69.1 F)
193320.6 C (69.1 F)
193425.0 C (77.0 F)
193526.1 C (79.0 F)
193629.4 C (84.9 F)
193723.9 C (75.0 F)
193822.2 C (72.0 F)
193923.9 C (75.0 F)
194025.6 C (78.1 F)
194125.0 C (77.0 F)
194225.6 C (78.1 F)
194328.9 C (84.0 F)
194426.7 C (80.1 F)
194525.0 C (77.0 F)
194627.2 C (81.0 F)
194728.9 C (84.0 F)
194825.0 C (77.0 F)
194918.9 C (66.0 F)
195026.7 C (80.1 F)
195128.9 C (84.0 F)
195226.7 C (80.1 F)
195328.3 C (82.9 F)
195425.0 C (77.0 F)
195527.2 C (81.0 F)
195625.6 C (78.1 F)
195729.4 C (84.9 F)
195821.7 C (71.1 F)
195926.7 C (80.1 F)
196026.1 C (79.0 F)
196125.0 C (77.0 F)
196223.9 C (75.0 F)
196326.7 C (80.1 F)
196424.4 C (75.9 F)
196525.6 C (78.1 F)
196635.0 C (95.0 F)
196725.6 C (78.1 F)
196828.9 C (84.0 F)
196926.7 C (80.1 F)
197027.8 C (82.0 F)
197129.4 C (84.9 F)
197227.2 C (81.0 F)
197321.7 C (71.1 F)
197428.3 C (82.9 F)
197527.8 C (82.0 F)
197625.0 C (77.0 F)
197726.1 C (79.0 F)
197823.3 C (73.9 F)
197923.9 C (75.0 F)
198022.8 C (73.0 F)
198122.2 C (72.0 F)
198222.2 C (72.0 F)
198326.7 C (80.1 F)
198426.7 C (80.1 F)
198526.1 C (79.0 F)
198627.8 C (82.0 F)
198727.2 C (81.0 F)
198822.2 C (72.0 F)
198926.7 C (80.1 F)
199030.0 C (86.0 F)
199123.3 C (73.9 F)
199223.3 C (73.9 F)
199327.8 C (82.0 F)
199427.2 C (81.0 F)
199526.7 C (80.1 F)
199626.1 C (79.0 F)
199728.9 C (84.0 F)
199826.1 C (79.0 F)
199930.6 C (87.1 F)
200023.3 C (73.9 F)
200124.4 C (75.9 F)
200225.6 C (78.1 F)
200327.8 C (82.0 F)
200429.4 C (84.9 F)
200526.7 C (80.1 F)
200625.6 C (78.1 F)
200725.0 C (77.0 F)
200822.2 C (72.0 F)
200929.4 C (84.9 F)
201023.9 C (75.0 F)
201123.9 C (75.0 F)
201221.7 C (71.1 F)
201331.1 C (88.0 F)
201425.6 C (78.1 F)
201527.8 C (82.0 F)
201628.9 C (84.0 F)
201728.3 C (82.9 F)
201827.8 C (82.0 F)
201930.0 C (86.0 F)
202027.8 C (82.0 F)
202123.9 C (75.0 F)
202226.7 C (80.1 F)
202325.6 C (78.1 F)
202423.9 C (75.0 F)
202526.1 C (79.0 F)
202626.1 C (79.0 F)

Coldest night (TNn)

Coldest night (TNn) at Seward AP by year The coldest night of the year at Seward AP, 1908 to 2026. The record is -28.9 C (-20.0 F) in 1919, marked on the chart; the median year is -18.9 C (-2.0 F). -30-25-20-15-10192019401960198020002020Record: -28.9 C (-20.0 F) in 1919
The coldest night of the year at Seward AP, 1908 to 2026. The record is -28.9 C (-20.0 F) in 1919, marked on the chart; the median year is -18.9 C (-2.0 F).
Coldest night (TNn) at Seward AP by year
YearColdest night (TNn)
1908-18.3 C (-0.9 F)
1909-27.2 C (-17.0 F)
1910-24.4 C (-11.9 F)
1911-21.7 C (-7.1 F)
1912-23.3 C (-9.9 F)
1913-23.9 C (-11.0 F)
1914-14.4 C (6.1 F)
1915-15.0 C (5.0 F)
1916-21.1 C (-6.0 F)
1917-25.6 C (-14.1 F)
1918-24.4 C (-11.9 F)
1919-28.9 C (-20.0 F)
1920-19.4 C (-2.9 F)
1921-20.6 C (-5.1 F)
1922-18.9 C (-2.0 F)
1923-15.6 C (3.9 F)
1924-20.0 C (-4.0 F)
1925-20.0 C (-4.0 F)
1929-20.0 C (-4.0 F)
1930-20.0 C (-4.0 F)
1931-17.8 C (0.0 F)
1932-22.8 C (-9.0 F)
1933-20.6 C (-5.1 F)
1934-22.8 C (-9.0 F)
1935-20.0 C (-4.0 F)
1936-18.9 C (-2.0 F)
1937-17.8 C (0.0 F)
1938-18.9 C (-2.0 F)
1939-15.6 C (3.9 F)
1940-17.2 C (1.0 F)
1941-17.2 C (1.0 F)
1942-20.6 C (-5.1 F)
1943-24.4 C (-11.9 F)
1944-21.1 C (-6.0 F)
1945-16.1 C (3.0 F)
1946-21.7 C (-7.1 F)
1947-27.2 C (-17.0 F)
1948-18.3 C (-0.9 F)
1949-18.9 C (-2.0 F)
1950-17.8 C (0.0 F)
1951-23.3 C (-9.9 F)
1952-20.6 C (-5.1 F)
1953-18.9 C (-2.0 F)
1954-21.1 C (-6.0 F)
1955-17.8 C (0.0 F)
1956-20.0 C (-4.0 F)
1957-19.4 C (-2.9 F)
1958-15.6 C (3.9 F)
1959-17.2 C (1.0 F)
1960-18.9 C (-2.0 F)
1961-24.4 C (-11.9 F)
1962-19.4 C (-2.9 F)
1963-17.8 C (0.0 F)
1964-23.3 C (-9.9 F)
1965-17.8 C (0.0 F)
1966-19.4 C (-2.9 F)
1967-16.7 C (1.9 F)
1968-21.7 C (-7.1 F)
1969-19.4 C (-2.9 F)
1970-18.3 C (-0.9 F)
1971-22.2 C (-8.0 F)
1972-20.0 C (-4.0 F)
1973-21.7 C (-7.1 F)
1974-19.4 C (-2.9 F)
1975-22.2 C (-8.0 F)
1976-17.8 C (0.0 F)
1977-16.7 C (1.9 F)
1978-14.4 C (6.1 F)
1979-20.6 C (-5.1 F)
1980-21.1 C (-6.0 F)
1981-15.0 C (5.0 F)
1982-22.2 C (-8.0 F)
1983-17.8 C (0.0 F)
1984-18.3 C (-0.9 F)
1985-15.0 C (5.0 F)
1986-16.1 C (3.0 F)
1987-13.3 C (8.1 F)
1988-22.2 C (-8.0 F)
1989-26.1 C (-15.0 F)
1990-18.9 C (-2.0 F)
1991-15.6 C (3.9 F)
1992-16.7 C (1.9 F)
1993-16.7 C (1.9 F)
1994-20.6 C (-5.1 F)
1995-17.8 C (0.0 F)
1996-16.7 C (1.9 F)
1997-21.7 C (-7.1 F)
1998-16.1 C (3.0 F)
1999-26.1 C (-15.0 F)
2000-15.6 C (3.9 F)
2001-18.3 C (-0.9 F)
2002-15.6 C (3.9 F)
2003-16.1 C (3.0 F)
2004-20.0 C (-4.0 F)
2005-16.1 C (3.0 F)
2006-20.0 C (-4.0 F)
2007-18.9 C (-2.0 F)
2008-22.2 C (-8.0 F)
2009-19.9 C (-3.8 F)
2010-15.5 C (4.1 F)
2011-17.1 C (1.2 F)
2012-20.5 C (-4.9 F)
2013-16.6 C (2.1 F)
2014-14.9 C (5.2 F)
2015-13.2 C (8.2 F)
2016-12.7 C (9.1 F)
2017-16.0 C (3.2 F)
2018-14.3 C (6.3 F)
2019-13.8 C (7.2 F)
2020-16.6 C (2.1 F)
2021-16.6 C (2.1 F)
2022-16.0 C (3.2 F)
2023-16.6 C (2.1 F)
2024-19.3 C (-2.7 F)
2025-14.4 C (6.1 F)
2026-18.9 C (-2.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Seward AP by year The wettest day of the year at Seward AP, 1908 to 2026. The record is 382.3 mm (15.1 in) in 1986, marked on the chart; the median year is 76.5 mm (3.0 in). 0100200300400192019401960198020002020Record: 382.3 mm (15.1 in) in 1986
The wettest day of the year at Seward AP, 1908 to 2026. The record is 382.3 mm (15.1 in) in 1986, marked on the chart; the median year is 76.5 mm (3.0 in).
Wettest day (Rx1day) at Seward AP by year
YearWettest day (Rx1day)
1908138.4 mm (5.4 in)
190973.7 mm (2.9 in)
191048.3 mm (1.9 in)
191144.5 mm (1.8 in)
191258.4 mm (2.3 in)
191365.5 mm (2.6 in)
191468.6 mm (2.7 in)
191560.5 mm (2.4 in)
191686.4 mm (3.4 in)
1917182.9 mm (7.2 in)
1918101.6 mm (4.0 in)
191976.2 mm (3.0 in)
192076.2 mm (3.0 in)
192188.9 mm (3.5 in)
192269.9 mm (2.8 in)
1923101.6 mm (4.0 in)
192476.2 mm (3.0 in)
192536.8 mm (1.4 in)
192968.6 mm (2.7 in)
193073.7 mm (2.9 in)
193176.2 mm (3.0 in)
193244.7 mm (1.8 in)
193369.1 mm (2.7 in)
1934232.9 mm (9.2 in)
1935171.5 mm (6.8 in)
193679.2 mm (3.1 in)
193767.8 mm (2.7 in)
193879.8 mm (3.1 in)
193986.9 mm (3.4 in)
194078.7 mm (3.1 in)
194154.6 mm (2.1 in)
194274.7 mm (2.9 in)
1943103.1 mm (4.1 in)
194481.0 mm (3.2 in)
194577.5 mm (3.1 in)
194646.2 mm (1.8 in)
194774.2 mm (2.9 in)
194864.8 mm (2.6 in)
194987.6 mm (3.4 in)
195071.1 mm (2.8 in)
195154.9 mm (2.2 in)
1952114.3 mm (4.5 in)
195376.7 mm (3.0 in)
195474.9 mm (2.9 in)
195573.7 mm (2.9 in)
195652.6 mm (2.1 in)
1957110.0 mm (4.3 in)
195873.9 mm (2.9 in)
195994.2 mm (3.7 in)
196083.1 mm (3.3 in)
196196.8 mm (3.8 in)
196251.8 mm (2.0 in)
196379.2 mm (3.1 in)
196473.4 mm (2.9 in)
196589.7 mm (3.5 in)
196680.0 mm (3.1 in)
196772.4 mm (2.9 in)
196851.1 mm (2.0 in)
1969100.6 mm (4.0 in)
197098.0 mm (3.9 in)
197163.2 mm (2.5 in)
197295.0 mm (3.7 in)
197356.9 mm (2.2 in)
197463.0 mm (2.5 in)
197558.4 mm (2.3 in)
1976131.1 mm (5.2 in)
1977109.7 mm (4.3 in)
197856.9 mm (2.2 in)
1979100.1 mm (3.9 in)
198078.0 mm (3.1 in)
198197.5 mm (3.8 in)
198267.3 mm (2.6 in)
198361.7 mm (2.4 in)
198480.5 mm (3.2 in)
1985129.8 mm (5.1 in)
1986382.3 mm (15.1 in)
198797.3 mm (3.8 in)
198865.8 mm (2.6 in)
1989105.9 mm (4.2 in)
199047.8 mm (1.9 in)
199151.1 mm (2.0 in)
199264.0 mm (2.5 in)
199388.9 mm (3.5 in)
199482.6 mm (3.3 in)
1995249.2 mm (9.8 in)
1996103.9 mm (4.1 in)
199774.2 mm (2.9 in)
199887.6 mm (3.4 in)
199987.6 mm (3.4 in)
200071.4 mm (2.8 in)
2001127.5 mm (5.0 in)
2002102.4 mm (4.0 in)
2003108.0 mm (4.3 in)
2004138.4 mm (5.4 in)
200562.0 mm (2.4 in)
200670.1 mm (2.8 in)
200794.2 mm (3.7 in)
200851.3 mm (2.0 in)
200993.5 mm (3.7 in)
201063.2 mm (2.5 in)
201183.6 mm (3.3 in)
2012149.4 mm (5.9 in)
201370.4 mm (2.8 in)
201484.1 mm (3.3 in)
201581.8 mm (3.2 in)
2016105.4 mm (4.1 in)
201751.8 mm (2.0 in)
201881.8 mm (3.2 in)
201963.2 mm (2.5 in)
202089.9 mm (3.5 in)
202163.2 mm (2.5 in)
202255.1 mm (2.2 in)
202344.5 mm (1.8 in)
202490.9 mm (3.6 in)
202562.0 mm (2.4 in)
202667.3 mm (2.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Seward AP by year The wettest five days of the year at Seward AP, 1908 to 2026. The record is 517.1 mm (20.4 in) in 1986, marked on the chart; the median year is 167.3 mm (6.6 in). 0200400600192019401960198020002020Record: 517.1 mm (20.4 in) in 1986
The wettest five days of the year at Seward AP, 1908 to 2026. The record is 517.1 mm (20.4 in) in 1986, marked on the chart; the median year is 167.3 mm (6.6 in).
Wettest five days (Rx5day) at Seward AP by year
YearWettest five days (Rx5day)
1908271.4 mm (10.7 in)
1909142.2 mm (5.6 in)
1910106.0 mm (4.2 in)
1911148.1 mm (5.8 in)
1912144.7 mm (5.7 in)
1913197.8 mm (7.8 in)
1914123.3 mm (4.9 in)
1915119.5 mm (4.7 in)
1916230.4 mm (9.1 in)
1917359.8 mm (14.2 in)
1918309.6 mm (12.2 in)
1919167.7 mm (6.6 in)
1920176.6 mm (7.0 in)
1921180.6 mm (7.1 in)
1922181.7 mm (7.2 in)
1923253.4 mm (10.0 in)
1924161.3 mm (6.4 in)
192544.7 mm (1.8 in)
1929122.7 mm (4.8 in)
1930166.2 mm (6.5 in)
1931157.5 mm (6.2 in)
193294.1 mm (3.7 in)
1933141.0 mm (5.6 in)
1934412.2 mm (16.2 in)
1935264.4 mm (10.4 in)
1936199.8 mm (7.9 in)
1937187.3 mm (7.4 in)
1938299.6 mm (11.8 in)
1939132.9 mm (5.2 in)
1940236.1 mm (9.3 in)
1941169.4 mm (6.7 in)
1942154.4 mm (6.1 in)
1943203.4 mm (8.0 in)
1944163.2 mm (6.4 in)
1945182.4 mm (7.2 in)
1946108.2 mm (4.3 in)
1947180.4 mm (7.1 in)
1948141.3 mm (5.6 in)
1949166.8 mm (6.6 in)
1950202.0 mm (8.0 in)
1951138.2 mm (5.4 in)
1952210.8 mm (8.3 in)
1953145.3 mm (5.7 in)
1954137.1 mm (5.4 in)
1955162.9 mm (6.4 in)
1956156.5 mm (6.2 in)
1957177.5 mm (7.0 in)
1958124.0 mm (4.9 in)
1959178.6 mm (7.0 in)
1960120.2 mm (4.7 in)
1961232.7 mm (9.2 in)
1962124.9 mm (4.9 in)
1963155.4 mm (6.1 in)
1964170.6 mm (6.7 in)
1965163.1 mm (6.4 in)
1966178.1 mm (7.0 in)
1967210.1 mm (8.3 in)
1968139.5 mm (5.5 in)
1969215.7 mm (8.5 in)
1970209.6 mm (8.3 in)
1971145.0 mm (5.7 in)
1972124.4 mm (4.9 in)
1973103.6 mm (4.1 in)
1974151.9 mm (6.0 in)
1975145.6 mm (5.7 in)
1976219.9 mm (8.7 in)
1977168.7 mm (6.6 in)
1978135.5 mm (5.3 in)
1979194.2 mm (7.6 in)
1980184.3 mm (7.3 in)
1981196.3 mm (7.7 in)
1982128.9 mm (5.1 in)
1983128.0 mm (5.0 in)
1984174.5 mm (6.9 in)
1985230.8 mm (9.1 in)
1986517.1 mm (20.4 in)
1987223.0 mm (8.8 in)
1988125.3 mm (4.9 in)
1989235.0 mm (9.3 in)
1990113.5 mm (4.5 in)
1991133.8 mm (5.3 in)
1992147.6 mm (5.8 in)
1993159.7 mm (6.3 in)
1994190.5 mm (7.5 in)
1995358.7 mm (14.1 in)
1996171.5 mm (6.8 in)
1997205.3 mm (8.1 in)
1998145.8 mm (5.7 in)
1999215.9 mm (8.5 in)
2000156.1 mm (6.1 in)
2001250.4 mm (9.9 in)
2002268.4 mm (10.6 in)
2003223.1 mm (8.8 in)
2004183.1 mm (7.2 in)
2005124.9 mm (4.9 in)
2006200.2 mm (7.9 in)
2007259.4 mm (10.2 in)
2008129.8 mm (5.1 in)
2009211.9 mm (8.3 in)
2010205.2 mm (8.1 in)
2011134.4 mm (5.3 in)
2012380.3 mm (15.0 in)
2013162.8 mm (6.4 in)
2014146.3 mm (5.8 in)
2015206.7 mm (8.1 in)
2016140.8 mm (5.5 in)
2017121.7 mm (4.8 in)
2018169.6 mm (6.7 in)
2019135.4 mm (5.3 in)
2020198.1 mm (7.8 in)
2021147.3 mm (5.8 in)
2022119.1 mm (4.7 in)
2023121.9 mm (4.8 in)
2024177.1 mm (7.0 in)
2025122.2 mm (4.8 in)
2026114.8 mm (4.5 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Seward AP by year The longest dry spell of the year at Seward AP, 1908 to 2026. The record is 49 days in 1967, marked on the chart; the median year is 20 days. 01020304050192019401960198020002020Record: 49 days in 1967
The longest dry spell of the year at Seward AP, 1908 to 2026. The record is 49 days in 1967, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at Seward AP by year
YearLongest dry spell (CDD)
190822 days
190928 days
191040 days
191125 days
191218 days
191344 days
191420 days
191534 days
191633 days
191714 days
191829 days
191921 days
192029 days
192118 days
192222 days
192319 days
192420 days
192517 days
192918 days
193025 days
193114 days
193218 days
193333 days
193416 days
193519 days
193626 days
193723 days
193814 days
193914 days
194016 days
194112 days
194216 days
194318 days
194413 days
194519 days
194621 days
194720 days
194839 days
194912 days
195047 days
195119 days
195212 days
195316 days
195423 days
195522 days
195628 days
195721 days
195820 days
195925 days
196016 days
196116 days
196219 days
196320 days
196417 days
196515 days
196621 days
196749 days
196821 days
196924 days
197018 days
197126 days
197233 days
197316 days
197417 days
197523 days
197616 days
197736 days
197816 days
197930 days
198033 days
198119 days
198237 days
198317 days
198421 days
198524 days
198618 days
198720 days
198815 days
198928 days
199016 days
19919 days
199217 days
199321 days
199428 days
199519 days
199622 days
199718 days
199815 days
199920 days
200014 days
200119 days
200223 days
200318 days
200417 days
200523 days
200623 days
200718 days
200814 days
200920 days
201024 days
201131 days
201223 days
201325 days
201423 days
201519 days
201614 days
201716 days
201825 days
201927 days
202016 days
202129 days
202227 days
202320 days
202421 days
202521 days
202612 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

98 years with a frost

Across 98 years with a frost, the median last spring frost at Seward AP falls on 9 May and the median first autumn frost on 4 October, which leaves a median of 149 days between them.

In 1993 to 2024 the median growing season was 153 days. That is 19 days more than in 1909 to 1952.

Fitted over all years, the growing season changes by +2.3 days per decade at this station.

Frost dates and growing season at Seward AP
MeasureMedian, all yearsEarliest period (1909 to 1952)Recent period (1993 to 2024)Recent against earliestFitted trend
Last spring frost9 May14 May8 May6 days earlier-0.9 days per decade
First autumn frost4 October27 September2 October5 days later+1.4 days per decade
Growing days149 days134 days153 days19 days more+2.3 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

102 years, 1908 to 2024

A day with at least 76.3 mm (3.0 in) of rain is expected about once in 2 years. A day with at least 247.9 mm (9.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Seward AP: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years76.3 mm (3.0 in)
5 years104.0 mm (4.1 in)
10 years128.0 mm (5.0 in)
25 years166.9 mm (6.6 in)
50 years203.5 mm (8.0 in)
100 years247.9 mm (9.8 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 102 years of values from 1908 to 2024.

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: 382.3 mm (15.1 in) in 1986; 249.2 mm (9.8 in) in 1995; 232.9 mm (9.2 in) in 1934.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Seward AP, at 2002. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 2002 ran 0.7 C (1.2 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Seward AP, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
2002-0.7-1.2likely5

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

2009 to 2024 against 1961 to 1990

Over 2009 to 2024, Seward AP had a mean temperature of 4.7 C (40.5 F) and 1,517.6 mm (59.7 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Altastenberg (Germany, 7,479 km away), Juneau AP (United States, 866 km away) and Auke Bay (United States, 860 km away).

Climate twins of Seward AP: stations whose 1961 to 1990 climate is closest to its 2009 to 2024 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
AltastenbergGermany7,479 km (4,647 mi)5.2 C (41.3 F)1,475.9 mm (58.1 in)0.85
Juneau APUnited States866 km (538 mi)4.8 C (40.6 F)1,366.5 mm (53.8 in)0.88
Auke BayUnited States860 km (534 mi)5.4 C (41.7 F)1,560.6 mm (61.4 in)0.95

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 Seward AP standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Seward AP 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-14).