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Chelan Weather Records (USC00451350)

Record envelope, standing records and threshold days for Chelan (USC00451350), Washington, United States, with 137 years of record.

Key Facts for Chelan

  • Chelan (USC00451350) is a weather station in Washington, United States at 47.83 latitude and -120.00 longitude, 364 m (1,194 ft) above sea level.
  • The station reports from 1890 to 2026, 137 years of record.
  • 1,464 records set at Chelan still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Chelan set a daily record high minimum temperature of 15.6 C (60.1 F) on 22 September 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Washington, United States, 47.83 latitude, -120.00 longitude.
  • Elevation: 364 m (1,194 ft).
  • Period of record: 1890 to 2026, 137 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

24 days at or beyond a record
Daily record high and record low at Chelan, with 2026 drawn through them The band shows the record high and record low for each calendar day at Chelan. The lines show the 2026 daily maximum and minimum. 24 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Chelan. The lines show the 2026 daily maximum and minimum. 24 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Chelan, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan16.7 C (62.1 F)-25.6 C (-14.1 F)7.2 C (45.0 F)-7.8 C (18.0 F)
Feb17.2 C (63.0 F)-18.3 C (-0.9 F)16.7 C (62.1 F)-8.3 C (17.1 F)
Mar22.2 C (72.0 F)-13.3 C (8.1 F)21.7 C (71.1 F)-3.3 C (26.1 F)
Apr31.1 C (88.0 F)-6.1 C (21.0 F)28.3 C (82.9 F)-1.7 C (28.9 F)
May36.7 C (98.1 F)-1.1 C (30.0 F)33.9 C (93.0 F)3.9 C (39.0 F)
Jun43.9 C (111.0 F)0.6 C (33.1 F)32.8 C (91.0 F)5.0 C (41.0 F)
Jul42.8 C (109.0 F)2.8 C (37.0 F)41.1 C (106.0 F)11.7 C (53.1 F)
Aug41.1 C (106.0 F)5.6 C (42.1 F)35.6 C (96.1 F)7.8 C (46.0 F)
Sep36.1 C (97.0 F)-3.3 C (26.1 F)30.6 C (87.1 F)4.4 C (39.9 F)
Oct31.1 C (88.0 F)-16.1 C (3.0 F)26.1 C (79.0 F)3.9 C (39.0 F)
Nov22.2 C (72.0 F)-19.4 C (-2.9 F)n/an/a
Dec20.6 C (69.1 F)-27.8 C (-18.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Chelan by the year they were set 1,464 records at Chelan still stand. 1983 holds the most, with 68. 0204060801958: 271959: 281960: 181961: 191962: 271963: 181964: 151965: 311966: 121967: 271968: 291969: 231970: 161971: 201972: 341973: 221974: 171975: 171976: 121977: 251978: 121979: 211980: 201981: 251982: 161983: 681984: 171985: 511986: 171987: 111988: 151989: 231990: 301991: 141992: 251993: 101994: 81995: 151996: 151997: 81998: 231999: 172000: 82001: 112002: 192003: 172004: 152005: 152006: 122007: 122008: 72009: 162010: 62011: 162012: 182013: 152014: 202015: 302016: 222017: 152018: 172019: 292020: 232021: 402022: 512023: 262024: 542025: 312026: 211958196519721979198619932000200720142021
1,464 records at Chelan still stand. 1983 holds the most, with 68.
Standing records at Chelan by the year they were set
Year setStanding records
195827
195928
196018
196119
196227
196318
196415
196531
196612
196727
196829
196923
197016
197120
197234
197322
197417
197517
197612
197725
197812
197921
198020
198125
198216
198368
198417
198551
198617
198711
198815
198923
199030
199114
199225
199310
19948
199515
199615
19978
199823
199917
20008
200111
200219
200317
200415
200515
200612
200712
20087
200916
20106
201116
201218
201315
201420
201530
201622
201715
201817
201929
202023
202140
202251
202326
202454
202531
202621

All-Time Record Progression

3 new records
When Chelan set new all-time records 3 all-time records were set at Chelan between 28 June 2015 and 30 June 2021. Each dot is a new record. Record high maximum temperature28 June 2015: Record high maximum temperature 42.8 C (109.0 F)29 June 2015: Record high maximum temperature 43.3 C (109.9 F)30 June 2021: Record high maximum temperature 43.9 C (111.0 F)20152020
3 all-time records were set at Chelan between 28 June 2015 and 30 June 2021. Each dot is a new record.
When Chelan set new all-time records
DateKindDetail
2015-06-28Record high maximum temperatureRecord high maximum temperature 42.8 C (109.0 F)
2015-06-29Record high maximum temperatureRecord high maximum temperature 43.3 C (109.9 F)
2021-06-30Record high maximum temperatureRecord high maximum temperature 43.9 C (111.0 F)

Wettest Day of Each Month

Jun: 47.8 mm (1.9 in)
Record daily precipitation for each month at Chelan The wettest day on record for each calendar month at Chelan. The most was 47.8 mm (1.9 in) on 21 June 1984. 0204060 Jan: 35.6 mm (1.4 in), 11 January 2000 Jan Feb: 27.2 mm (1.1 in), 25 February 1981 Feb Mar: 36.1 mm (1.4 in), 5 March 2023 Mar Apr: 27.9 mm (1.1 in), 15 April 1991 Apr May: 45.7 mm (1.8 in), 10 May 2005 May Jun: 47.8 mm (1.9 in), 21 June 1984 Jun Jul: 43.2 mm (1.7 in), 21 July 2012 Jul Aug: 37.8 mm (1.5 in), 19 August 1975 Aug Sep: 29.7 mm (1.2 in), 23 September 1973 Sep Oct: 36.6 mm (1.4 in), 31 October 2007 Oct Nov: 33.0 mm (1.3 in), 11 November 1983 Nov Dec: 38.1 mm (1.5 in), 31 December 1996 Dec
The wettest day on record for each calendar month at Chelan. The most was 47.8 mm (1.9 in) on 21 June 1984.
Record daily precipitation for each month at Chelan
MonthRecord daily precipitation (mm)Date
Jan35.6 mm (1.4 in)11 January 2000
Feb27.2 mm (1.1 in)25 February 1981
Mar36.1 mm (1.4 in)5 March 2023
Apr27.9 mm (1.1 in)15 April 1991
May45.7 mm (1.8 in)10 May 2005
Jun47.8 mm (1.9 in)21 June 1984
Jul43.2 mm (1.7 in)21 July 2012
Aug37.8 mm (1.5 in)19 August 1975
Sep29.7 mm (1.2 in)23 September 1973
Oct36.6 mm (1.4 in)31 October 2007
Nov33.0 mm (1.3 in)11 November 1983
Dec38.1 mm (1.5 in)31 December 1996

Period of Record Coverage

1890 to 2026
Days with data per year at Chelan 70 years of record at Chelan, 1890 to 2026. 8 years have data for under 90 percent of days and are left out of rankings: 1890, 1958, 1985, 2008, 2009, 2012, 2013, 2026. 1890: 1 of 365 days1958: 245 of 365 days1959: 364 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 355 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 364 of 366 days1969: 364 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 364 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 365 of 366 days1981: 364 of 365 days1982: 365 of 365 days1983: 363 of 365 days1984: 364 of 366 days1985: 322 of 365 days1986: 360 of 365 days1987: 360 of 365 days1988: 362 of 366 days1989: 361 of 365 days1990: 361 of 365 days1991: 364 of 365 days1992: 366 of 366 days1993: 365 of 365 days1994: 364 of 365 days1995: 364 of 365 days1996: 345 of 366 days1997: 363 of 365 days1998: 363 of 365 days1999: 341 of 365 days2000: 366 of 366 days2001: 362 of 365 days2002: 360 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 362 of 365 days2006: 365 of 365 days2007: 364 of 365 days2008: 327 of 366 days2009: 312 of 365 days2010: 363 of 365 days2011: 365 of 365 days2012: 325 of 366 days2013: 326 of 365 days2014: 351 of 365 days2015: 362 of 365 days2016: 364 of 366 days2017: 365 of 365 days2018: 359 of 365 days2019: 358 of 365 days2020: 355 of 366 days2021: 349 of 365 days2022: 363 of 365 days2023: 364 of 365 days2024: 365 of 366 days2025: 365 of 365 days2026: 282 of 365 days18901960197019801990200020102020
70 years of record at Chelan, 1890 to 2026. 8 years have data for under 90 percent of days and are left out of rankings: 1890, 1958, 1985, 2008, 2009, 2012, 2013, 2026.
Days with data per year at Chelan
YearDays with dataShare of yearComplete
189010%No
195824567%No
1959364100%Yes
1960366100%Yes
1961365100%Yes
196235597%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
196836499%Yes
1969364100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975364100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980365100%Yes
1981364100%Yes
1982365100%Yes
198336399%Yes
198436499%Yes
198532288%No
198636099%Yes
198736099%Yes
198836299%Yes
198936199%Yes
199036199%Yes
1991364100%Yes
1992366100%Yes
1993365100%Yes
1994364100%Yes
1995364100%Yes
199634594%Yes
199736399%Yes
199836399%Yes
199934193%Yes
2000366100%Yes
200136299%Yes
200236099%Yes
2003365100%Yes
2004366100%Yes
200536299%Yes
2006365100%Yes
2007364100%Yes
200832789%No
200931285%No
201036399%Yes
2011365100%Yes
201232589%No
201332689%No
201435196%Yes
201536299%Yes
201636499%Yes
2017365100%Yes
201835998%Yes
201935898%Yes
202035597%Yes
202134996%Yes
202236399%Yes
2023364100%Yes
2024365100%Yes
2025365100%Yes
202628277%No

Latest Records

20
Latest records at Chelan
DateStationRecordValueBeat old record byOld record stoodSignificance
22 September 2026Chelan, USdaily high min (Provisional)15.6 C (60.1 F)2.8 C (5.0 F)59 years35 of 100 (Notable)
22 September 2026Chelan, USdaily high max (Tie, Provisional)30.6 C (87.1 F)tie64 years7 of 100 (Routine)
21 September 2026Chelan, USdaily high max (Provisional)30.6 C (87.1 F)1.2 C (2.2 F)59 years29 of 100 (Routine)
14 September 2026Chelan, USdaily low max (Tie, Provisional)14.4 C (57.9 F)tie45 years5 of 100 (Routine)
20 August 2026Chelan, USdaily low min (Provisional)7.8 C (46.0 F)2.2 C (4.0 F)57 years34 of 100 (Routine)
3 August 2026Chelan, USdaily low max (Tie)20.6 C (69.1 F)tie36 years5 of 100 (Routine)
23 July 2026Chelan, USdaily high max41.1 C (106.0 F)1.7 C (3.1 F)23 years19 of 100 (Routine)
16 July 2026Chelan, USdaily high max38.3 C (100.9 F)0.5 C (0.9 F)12 years14 of 100 (Routine)
8 July 2026Chelan, USdaily high min (Tie)20.6 C (69.1 F)tie28 years4 of 100 (Routine)
9 June 2026Chelan, USdaily rain13.0 mm (0.5 in)3.3 mm (0.13 in)39 years20 of 100 (Routine)
8 June 2026Chelan, USdaily low min5.0 C (41.0 F)0.6 C (1.1 F)4 years12 of 100 (Routine)
30 May 2026Chelan, USdaily high max (Tie)33.9 C (93.0 F)tie43 years5 of 100 (Routine)
29 May 2026Chelan, USdaily high max33.9 C (93.0 F)1.7 C (3.1 F)0 years13 of 100 (Routine)
6 May 2026Chelan, USdaily high min16.1 C (61.0 F)1.1 C (2.0 F)60 years31 of 100 (Routine)
6 May 2026Chelan, USdaily high max (Tie)30.0 C (86.0 F)tie28 years4 of 100 (Routine)
5 May 2026Chelan, USdaily high max (Tie)30.6 C (87.1 F)tie28 years4 of 100 (Routine)
4 May 2026Chelan, USdaily high max30.6 C (87.1 F)0.6 C (1.1 F)3 years11 of 100 (Routine)
2 May 2026Chelan, USdaily high max (Tie)27.2 C (81.0 F)tie21 years4 of 100 (Routine)
26 April 2026Chelan, USdaily low min (Tie)-0.6 C (30.9 F)tie11 years3 of 100 (Routine)
25 April 2026Chelan, USdaily low min-1.7 C (28.9 F)1.1 C (2.0 F)44 years26 of 100 (Routine)

Climate Trend

57 complete years, 1959 to 2025
Annual mean temperature at Chelan as warming stripes, 1959 to 2025 One stripe for each of 57 complete years at Chelan, 1959 to 2025. Blue stripes are years cooler than the station's own mean of 10.3 C (50.6 F); red stripes are warmer. The coolest year was 1984, at 9.1 C (48.3 F), and the warmest was 2025, at 11.7 C (53.0 F). The strongest colour marks a difference of 1.4 C (2.5 F). 1959: 9.7 C, -0.7 C from the station mean1960: 9.9 C, -0.4 C from the station mean1961: 10.6 C, +0.3 C from the station mean1963: 10.4 C, +0.1 C from the station mean1964: 9.3 C, -1.0 C from the station mean1965: 10.3 C, 0.0 C from the station mean1966: 10.4 C, +0.1 C from the station mean1967: 11.3 C, +0.9 C from the station mean1968: 10.0 C, -0.3 C from the station mean1969: 9.4 C, -0.9 C from the station mean1970: 9.9 C, -0.5 C from the station mean1971: 9.6 C, -0.7 C from the station mean1972: 9.2 C, -1.1 C from the station mean1973: 10.5 C, +0.2 C from the station mean1974: 10.5 C, +0.2 C from the station mean1975: 9.5 C, -0.8 C from the station mean1976: 9.9 C, -0.5 C from the station mean1977: 10.4 C, +0.1 C from the station mean1978: 9.8 C, -0.5 C from the station mean1979: 10.3 C, -0.1 C from the station mean1980: 9.2 C, -1.1 C from the station mean1981: 10.3 C, 0.0 C from the station mean1982: 9.4 C, -1.0 C from the station mean1983: 9.2 C, -1.1 C from the station mean1984: 9.1 C, -1.3 C from the station mean1986: 10.7 C, +0.4 C from the station mean1987: 11.4 C, +1.1 C from the station mean1988: 10.8 C, +0.5 C from the station mean1989: 10.4 C, +0.1 C from the station mean1990: 10.8 C, +0.4 C from the station mean1991: 10.2 C, -0.1 C from the station mean1992: 10.9 C, +0.5 C from the station mean1993: 9.2 C, -1.1 C from the station mean1994: 10.8 C, +0.4 C from the station mean1995: 10.4 C, +0.1 C from the station mean1997: 9.9 C, -0.4 C from the station mean1998: 11.6 C, +1.2 C from the station mean2000: 10.2 C, -0.1 C from the station mean2001: 11.0 C, +0.7 C from the station mean2002: 11.0 C, +0.7 C from the station mean2003: 11.5 C, +1.2 C from the station mean2004: 11.6 C, +1.2 C from the station mean2005: 10.7 C, +0.4 C from the station mean2006: 11.0 C, +0.7 C from the station mean2007: 10.6 C, +0.3 C from the station mean2010: 10.4 C, +0.1 C from the station mean2011: 9.5 C, -0.8 C from the station mean2015: 11.6 C, +1.2 C from the station mean2016: 10.9 C, +0.5 C from the station mean2017: 9.4 C, -0.9 C from the station mean2018: 10.5 C, +0.2 C from the station mean2019: 9.7 C, -0.7 C from the station mean2020: 10.8 C, +0.5 C from the station mean2021: 11.0 C, +0.7 C from the station mean2022: 9.3 C, -1.1 C from the station mean2023: 10.9 C, +0.6 C from the station mean2025: 11.7 C, +1.4 C from the station mean1959197019801990200020102020
One stripe for each of 57 complete years at Chelan, 1959 to 2025. Blue stripes are years cooler than the station's own mean of 10.3 C (50.6 F); red stripes are warmer. The coolest year was 1984, at 9.1 C (48.3 F), and the warmest was 2025, at 11.7 C (53.0 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Chelan as warming stripes, 1959 to 2025
YearAnnual mean temperatureDifference from the station mean
19599.7 C-0.67 C
19609.9 C-0.39 C
196110.6 C+0.27 C
196310.4 C+0.08 C
19649.3 C-0.98 C
196510.3 C-0.02 C
196610.4 C+0.12 C
196711.3 C+0.94 C
196810.0 C-0.30 C
19699.4 C-0.89 C
19709.9 C-0.47 C
19719.6 C-0.74 C
19729.2 C-1.10 C
197310.5 C+0.20 C
197410.5 C+0.22 C
19759.5 C-0.82 C
19769.9 C-0.47 C
197710.4 C+0.05 C
19789.8 C-0.51 C
197910.3 C-0.07 C
19809.2 C-1.11 C
198110.3 C+0.00 C
19829.4 C-0.96 C
19839.2 C-1.12 C
19849.1 C-1.26 C
198610.7 C+0.40 C
198711.4 C+1.10 C
198810.8 C+0.47 C
198910.4 C+0.10 C
199010.8 C+0.43 C
199110.2 C-0.10 C
199210.9 C+0.53 C
19939.2 C-1.15 C
199410.8 C+0.43 C
199510.4 C+0.08 C
19979.9 C-0.43 C
199811.6 C+1.23 C
200010.2 C-0.14 C
200111.0 C+0.71 C
200211.0 C+0.65 C
200311.5 C+1.17 C
200411.6 C+1.24 C
200510.7 C+0.41 C
200611.0 C+0.65 C
200710.6 C+0.26 C
201010.4 C+0.12 C
20119.5 C-0.79 C
201511.6 C+1.23 C
201610.9 C+0.54 C
20179.4 C-0.91 C
201810.5 C+0.19 C
20199.7 C-0.67 C
202010.8 C+0.51 C
202111.0 C+0.65 C
20229.3 C-1.07 C
202310.9 C+0.61 C
202511.7 C+1.36 C

The annual mean temperature here has risen by 0.13 C (0.04 to 0.23) per decade over 1959 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 57 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Chelan
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.13 C (0.04 to 0.23) per decade0.2 F (0.1 to 0.4) per decade1959 to 202557Rise
Mean daily maximum0.2 C (0.1 to 0.3) per decade0.3 F (0.1 to 0.5) per decade1959 to 202557Rise
Mean daily minimum0.10 C (-0.02 to 0.21) per decade0.17 F (-0.04 to 0.39) per decade1959 to 202557Not 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

1890 to 2026
Yearly extremes at Chelan: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)43.9 C (111.0 F)202138.3 C (100.9 F)70
Coldest night (TNn)-27.8 C (-18.0 F)1968-14.7 C (5.5 F)70
Wettest day (Rx1day)47.8 mm (1.9 in)198422.3 mm (0.9 in)70
Wettest five days (Rx5day)87.9 mm (3.5 in)199740.5 mm (1.6 in)69
Longest dry spell (CDD)117 days198749 days70

Hottest day (TXx)

Hottest day (TXx) at Chelan by year The hottest day of the year at Chelan, 1890 to 2026. The record is 43.9 C (111.0 F) in 2021, marked on the chart; the median year is 38.3 C (100.9 F). 25303540451900192019401960198020002020Record: 43.9 C (111.0 F) in 2021
The hottest day of the year at Chelan, 1890 to 2026. The record is 43.9 C (111.0 F) in 2021, marked on the chart; the median year is 38.3 C (100.9 F).
Hottest day (TXx) at Chelan by year
YearHottest day (TXx)
189028.3 C (82.9 F)
195838.9 C (102.0 F)
195938.9 C (102.0 F)
196039.4 C (102.9 F)
196137.8 C (100.0 F)
196238.3 C (100.9 F)
196335.6 C (96.1 F)
196435.6 C (96.1 F)
196538.3 C (100.9 F)
196635.0 C (95.0 F)
196738.3 C (100.9 F)
196838.3 C (100.9 F)
196935.0 C (95.0 F)
197037.8 C (100.0 F)
197139.4 C (102.9 F)
197236.1 C (97.0 F)
197338.9 C (102.0 F)
197437.8 C (100.0 F)
197537.8 C (100.0 F)
197637.2 C (99.0 F)
197740.6 C (105.1 F)
197837.2 C (99.0 F)
197939.4 C (102.9 F)
198037.2 C (99.0 F)
198138.9 C (102.0 F)
198237.8 C (100.0 F)
198336.1 C (97.0 F)
198436.1 C (97.0 F)
198541.1 C (106.0 F)
198636.7 C (98.1 F)
198737.8 C (100.0 F)
198837.8 C (100.0 F)
198935.6 C (96.1 F)
199037.2 C (99.0 F)
199135.6 C (96.1 F)
199236.1 C (97.0 F)
199333.9 C (93.0 F)
199438.9 C (102.0 F)
199536.1 C (97.0 F)
199638.3 C (100.9 F)
199735.0 C (95.0 F)
199840.6 C (105.1 F)
199934.4 C (93.9 F)
200037.2 C (99.0 F)
200138.9 C (102.0 F)
200236.1 C (97.0 F)
200340.6 C (105.1 F)
200438.3 C (100.9 F)
200537.2 C (99.0 F)
200639.4 C (102.9 F)
200738.3 C (100.9 F)
200838.3 C (100.9 F)
200938.3 C (100.9 F)
201036.1 C (97.0 F)
201133.9 C (93.0 F)
201237.2 C (99.0 F)
201337.8 C (100.0 F)
201439.4 C (102.9 F)
201543.3 C (109.9 F)
201638.3 C (100.9 F)
201740.6 C (105.1 F)
201838.3 C (100.9 F)
201939.4 C (102.9 F)
202039.4 C (102.9 F)
202143.9 C (111.0 F)
202239.4 C (102.9 F)
202340.0 C (104.0 F)
202440.0 C (104.0 F)
202539.4 C (102.9 F)
202641.1 C (106.0 F)

Coldest night (TNn)

Coldest night (TNn) at Chelan by year The coldest night of the year at Chelan, 1890 to 2026. The record is -27.8 C (-18.0 F) in 1968, marked on the chart; the median year is -14.7 C (5.5 F). -40-200201900192019401960198020002020Record: -27.8 C (-18.0 F) in 1968
The coldest night of the year at Chelan, 1890 to 2026. The record is -27.8 C (-18.0 F) in 1968, marked on the chart; the median year is -14.7 C (5.5 F).
Coldest night (TNn) at Chelan by year
YearColdest night (TNn)
189014.4 C (57.9 F)
1958-11.1 C (12.0 F)
1959-20.0 C (-4.0 F)
1960-13.9 C (7.0 F)
1961-11.1 C (12.0 F)
1962-17.2 C (1.0 F)
1963-16.7 C (1.9 F)
1964-23.3 C (-9.9 F)
1965-11.1 C (12.0 F)
1966-10.6 C (12.9 F)
1967-11.7 C (10.9 F)
1968-27.8 C (-18.0 F)
1969-21.1 C (-6.0 F)
1970-11.1 C (12.0 F)
1971-14.4 C (6.1 F)
1972-18.9 C (-2.0 F)
1973-15.0 C (5.0 F)
1974-16.1 C (3.0 F)
1975-13.3 C (8.1 F)
1976-10.6 C (12.9 F)
1977-12.8 C (9.0 F)
1978-19.4 C (-2.9 F)
1979-20.6 C (-5.1 F)
1980-20.6 C (-5.1 F)
1981-12.2 C (10.0 F)
1982-18.9 C (-2.0 F)
1983-21.1 C (-6.0 F)
1984-16.1 C (3.0 F)
1985-19.4 C (-2.9 F)
1986-13.3 C (8.1 F)
1987-10.0 C (14.0 F)
1988-13.9 C (7.0 F)
1989-16.7 C (1.9 F)
1990-22.2 C (-8.0 F)
1991-15.6 C (3.9 F)
1992-12.8 C (9.0 F)
1993-19.4 C (-2.9 F)
1994-12.2 C (10.0 F)
1995-12.8 C (9.0 F)
1996-19.4 C (-2.9 F)
1997-15.6 C (3.9 F)
1998-15.6 C (3.9 F)
1999-7.2 C (19.0 F)
2000-11.7 C (10.9 F)
2001-8.9 C (16.0 F)
2002-7.2 C (19.0 F)
2003-9.4 C (15.1 F)
2004-19.4 C (-2.9 F)
2005-14.4 C (6.1 F)
2006-14.4 C (6.1 F)
2007-13.3 C (8.1 F)
2008-15.6 C (3.9 F)
2009-12.8 C (9.0 F)
2010-16.1 C (3.0 F)
2011-14.4 C (6.1 F)
2012-14.4 C (6.1 F)
2013-12.8 C (9.0 F)
2014-16.1 C (3.0 F)
2015-12.2 C (10.0 F)
2016-16.1 C (3.0 F)
2017-18.9 C (-2.0 F)
2018-12.2 C (10.0 F)
2019-15.0 C (5.0 F)
2020-14.4 C (6.1 F)
2021-18.3 C (-0.9 F)
2022-24.4 C (-11.9 F)
2023-18.3 C (-0.9 F)
2024-25.6 C (-14.1 F)
2025-15.0 C (5.0 F)
2026-8.3 C (17.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Chelan by year The wettest day of the year at Chelan, 1890 to 2026. The record is 47.8 mm (1.9 in) in 1984, marked on the chart; the median year is 22.3 mm (0.9 in). 02040601900192019401960198020002020Record: 47.8 mm (1.9 in) in 1984
The wettest day of the year at Chelan, 1890 to 2026. The record is 47.8 mm (1.9 in) in 1984, marked on the chart; the median year is 22.3 mm (0.9 in).
Wettest day (Rx1day) at Chelan by year
YearWettest day (Rx1day)
18900.0 mm (0.00 in)
195831.8 mm (1.3 in)
195921.3 mm (0.8 in)
196018.0 mm (0.7 in)
196117.0 mm (0.7 in)
196220.3 mm (0.8 in)
196325.1 mm (1.0 in)
196421.1 mm (0.8 in)
196518.3 mm (0.7 in)
196618.5 mm (0.7 in)
196722.4 mm (0.9 in)
196816.5 mm (0.6 in)
196919.6 mm (0.8 in)
197018.5 mm (0.7 in)
197123.6 mm (0.9 in)
197234.3 mm (1.4 in)
197329.7 mm (1.2 in)
197425.9 mm (1.0 in)
197537.8 mm (1.5 in)
197613.2 mm (0.5 in)
197714.2 mm (0.6 in)
197813.0 mm (0.5 in)
197922.1 mm (0.9 in)
198025.4 mm (1.0 in)
198127.2 mm (1.1 in)
198217.5 mm (0.7 in)
198333.0 mm (1.3 in)
198447.8 mm (1.9 in)
198514.7 mm (0.6 in)
198621.1 mm (0.8 in)
198733.5 mm (1.3 in)
198825.9 mm (1.0 in)
198921.8 mm (0.9 in)
199021.6 mm (0.9 in)
199132.3 mm (1.3 in)
199233.3 mm (1.3 in)
199315.2 mm (0.6 in)
199420.3 mm (0.8 in)
199519.1 mm (0.8 in)
199638.1 mm (1.5 in)
199728.7 mm (1.1 in)
199831.2 mm (1.2 in)
199919.1 mm (0.8 in)
200035.6 mm (1.4 in)
200135.6 mm (1.4 in)
200220.8 mm (0.8 in)
200317.5 mm (0.7 in)
200418.5 mm (0.7 in)
200545.7 mm (1.8 in)
200636.1 mm (1.4 in)
200736.6 mm (1.4 in)
200814.2 mm (0.6 in)
200915.2 mm (0.6 in)
201026.7 mm (1.1 in)
201124.9 mm (1.0 in)
201243.2 mm (1.7 in)
201319.8 mm (0.8 in)
201426.2 mm (1.0 in)
201525.7 mm (1.0 in)
201626.7 mm (1.1 in)
201734.5 mm (1.4 in)
201825.4 mm (1.0 in)
201918.3 mm (0.7 in)
202017.8 mm (0.7 in)
202120.3 mm (0.8 in)
202244.7 mm (1.8 in)
202336.1 mm (1.4 in)
202427.9 mm (1.1 in)
202515.2 mm (0.6 in)
202621.8 mm (0.9 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Chelan by year The wettest five days of the year at Chelan, 1890 to 2026. The record is 87.9 mm (3.5 in) in 1997, marked on the chart; the median year is 40.5 mm (1.6 in). 0204060801001900192019401960198020002020Record: 87.9 mm (3.5 in) in 1997
The wettest five days of the year at Chelan, 1890 to 2026. The record is 87.9 mm (3.5 in) in 1997, marked on the chart; the median year is 40.5 mm (1.6 in).
Wettest five days (Rx5day) at Chelan by year
YearWettest five days (Rx5day)
1890n/a
195842.2 mm (1.7 in)
195942.3 mm (1.7 in)
196031.5 mm (1.2 in)
196129.3 mm (1.2 in)
196247.2 mm (1.9 in)
196329.7 mm (1.2 in)
196437.6 mm (1.5 in)
196530.0 mm (1.2 in)
196630.2 mm (1.2 in)
196733.9 mm (1.3 in)
196835.8 mm (1.4 in)
196948.0 mm (1.9 in)
197032.3 mm (1.3 in)
197140.9 mm (1.6 in)
197240.4 mm (1.6 in)
197349.3 mm (1.9 in)
197443.0 mm (1.7 in)
197542.9 mm (1.7 in)
197620.0 mm (0.8 in)
197736.2 mm (1.4 in)
197825.5 mm (1.0 in)
197925.6 mm (1.0 in)
198030.5 mm (1.2 in)
198132.5 mm (1.3 in)
198233.0 mm (1.3 in)
198349.3 mm (1.9 in)
198467.6 mm (2.7 in)
198514.7 mm (0.6 in)
198651.8 mm (2.0 in)
198760.1 mm (2.4 in)
198834.3 mm (1.4 in)
198933.2 mm (1.3 in)
199048.3 mm (1.9 in)
199151.9 mm (2.0 in)
199237.9 mm (1.5 in)
199332.5 mm (1.3 in)
199431.3 mm (1.2 in)
199545.2 mm (1.8 in)
199664.8 mm (2.6 in)
199787.9 mm (3.5 in)
199852.8 mm (2.1 in)
199931.7 mm (1.2 in)
200050.1 mm (2.0 in)
200143.3 mm (1.7 in)
200252.5 mm (2.1 in)
200333.5 mm (1.3 in)
200429.0 mm (1.1 in)
200566.5 mm (2.6 in)
200672.9 mm (2.9 in)
200745.0 mm (1.8 in)
200830.0 mm (1.2 in)
200924.3 mm (1.0 in)
201034.0 mm (1.3 in)
201147.5 mm (1.9 in)
201254.6 mm (2.1 in)
201323.4 mm (0.9 in)
201442.8 mm (1.7 in)
201556.4 mm (2.2 in)
201648.8 mm (1.9 in)
201743.2 mm (1.7 in)
201827.1 mm (1.1 in)
201927.9 mm (1.1 in)
202030.2 mm (1.2 in)
202129.4 mm (1.2 in)
202258.7 mm (2.3 in)
202340.5 mm (1.6 in)
202454.3 mm (2.1 in)
202542.7 mm (1.7 in)
202645.9 mm (1.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Chelan by year The longest dry spell of the year at Chelan, 1890 to 2026. The record is 117 days in 1987, marked on the chart; the median year is 49 days. 0501001501900192019401960198020002020Record: 117 days in 1987
The longest dry spell of the year at Chelan, 1890 to 2026. The record is 117 days in 1987, marked on the chart; the median year is 49 days.
Longest dry spell (CDD) at Chelan by year
YearLongest dry spell (CDD)
18901 day
195843 days
195942 days
196064 days
196169 days
196243 days
196340 days
196446 days
196550 days
196646 days
196786 days
196876 days
196982 days
197095 days
197152 days
197234 days
197393 days
1974102 days
197539 days
197660 days
197770 days
197846 days
197938 days
198056 days
198175 days
198236 days
198330 days
198451 days
198592 days
198643 days
1987117 days
198869 days
198953 days
199039 days
199178 days
199261 days
199369 days
199448 days
199530 days
199636 days
199731 days
199841 days
199938 days
2000104 days
200154 days
200260 days
200385 days
200437 days
200543 days
200663 days
200741 days
200863 days
200934 days
201034 days
201160 days
201245 days
201332 days
201439 days
201572 days
201643 days
201796 days
201830 days
201938 days
202042 days
202155 days
202268 days
202330 days
202434 days
202553 days
202664 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

57 years with a frost

Across 57 years with a frost, the median last spring frost at Chelan falls on 13 April and the median first autumn frost on 25 October, which leaves a median of 192 days between them.

Fitted over all years, the growing season changes by +0.4 days per decade at this station.

Frost dates and growing season at Chelan
MeasureMedian, all yearsEarliest periodRecent period (1988 to 2025)Recent against earliestFitted trend
Last spring frost13 Apriln/a11 Apriln/a+0.2 days per decade
First autumn frost25 Octobern/a28 Octobern/a+0.6 days per decade
Growing days192 daysn/a205 daysn/a+0.4 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

64 years, 1959 to 2025

A day with at least 23.6 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 52.9 mm (2.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Chelan: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years23.6 mm (0.9 in)
5 years31.3 mm (1.2 in)
10 years36.5 mm (1.4 in)
25 years43.1 mm (1.7 in)
50 years48.0 mm (1.9 in)
100 years52.9 mm (2.1 in)Longer than the 64 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 64 years of values from 1959 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: 47.8 mm (1.9 in) in 1984; 45.7 mm (1.8 in) in 2005; 44.7 mm (1.8 in) in 2022.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Climate Twins

2005 to 2025 against 1961 to 1990

Over 2005 to 2025, Chelan had a mean temperature of 10.5 C (51.0 F) and 311.4 mm (12.3 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Nyssa (United States, 498 km away), Malheur Branch Exp STN (United States, 486 km away) and Kit Carson (United States, 1,713 km away).

Climate twins of Chelan: stations whose 1961 to 1990 climate is closest to its 2005 to 2025 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
NyssaUnited States498 km (309 mi)10.6 C (51.0 F)264.7 mm (10.4 in)0.65
Malheur Branch Exp STNUnited States486 km (302 mi)10.3 C (50.5 F)257.7 mm (10.1 in)0.70
Kit CarsonUnited States1,713 km (1,064 mi)10.4 C (50.7 F)364.4 mm (14.3 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 Chelan standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Chelan 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).