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Montague Siskiyou AP Weather Records (USW00024259)

Record envelope, standing records and threshold days for Montague Siskiyou AP (USW00024259), California, United States, with 79 years of record.

Key Facts for Montague Siskiyou AP

  • Montague Siskiyou AP (USW00024259) is a weather station in California, United States at 41.77 latitude and -122.47 longitude, 806 m (2,645 ft) above sea level.
  • The station reports from 1948 to 2026, 79 years of record.
  • 1,464 records set at Montague Siskiyou AP still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Montague Siskiyou AP tied a monthly record high maximum temperature of 33.9 C (93.0 F) on 8 October 2026 (provisional).

Provisional Records

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

About the Station

  • Location: California, United States, 41.77 latitude, -122.47 longitude.
  • Elevation: 806 m (2,645 ft).
  • Period of record: 1948 to 2026, 79 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

31 days at or beyond a record
Daily record high and record low at Montague Siskiyou AP, with 2026 drawn through them The band shows the record high and record low for each calendar day at Montague Siskiyou AP. The lines show the 2026 daily maximum and minimum. 31 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 Montague Siskiyou AP. The lines show the 2026 daily maximum and minimum. 31 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Montague Siskiyou AP, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan19.4 C (66.9 F)-25.5 C (-13.9 F)13.3 C (55.9 F)-11.7 C (10.9 F)
Feb22.2 C (72.0 F)-25.0 C (-13.0 F)18.9 C (66.0 F)-7.8 C (18.0 F)
Mar27.2 C (81.0 F)-11.6 C (11.1 F)27.2 C (81.0 F)-5.0 C (23.0 F)
Apr32.2 C (90.0 F)-9.4 C (15.1 F)25.6 C (78.1 F)-8.3 C (17.1 F)
May36.7 C (98.1 F)-7.1 C (19.2 F)31.7 C (89.1 F)1.1 C (34.0 F)
Jun42.8 C (109.0 F)-3.3 C (26.1 F)36.7 C (98.1 F)3.3 C (37.9 F)
Jul43.9 C (111.0 F)4.4 C (39.9 F)36.7 C (98.1 F)4.4 C (39.9 F)
Aug41.7 C (107.1 F)2.8 C (37.0 F)40.0 C (104.0 F)6.1 C (43.0 F)
Sep41.1 C (106.0 F)-2.8 C (27.0 F)34.4 C (93.9 F)1.7 C (35.1 F)
Oct33.3 C (91.9 F)-11.1 C (12.0 F)33.9 C (93.0 F)2.2 C (36.0 F)
Nov25.0 C (77.0 F)-13.2 C (8.2 F)n/an/a
Dec18.9 C (66.0 F)-22.7 C (-8.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Montague Siskiyou AP by the year they were set 1,464 records at Montague Siskiyou AP still stand. 1949 holds the most, with 84. 02550751001948: 441949: 841950: 681951: 411952: 431953: 62001: 422002: 522003: 422004: 242005: 432006: 432007: 392008: 722009: 392010: 422011: 602012: 392013: 582014: 562015: 492016: 482017: 452018: 282019: 322020: 402021: 412022: 842023: 362024: 482025: 472026: 2919481952200320072011201520192023
1,464 records at Montague Siskiyou AP still stand. 1949 holds the most, with 84.
Standing records at Montague Siskiyou AP by the year they were set
Year setStanding records
194844
194984
195068
195141
195243
19536
200142
200252
200342
200424
200543
200643
200739
200872
200939
201042
201160
201239
201358
201456
201549
201648
201745
201828
201932
202040
202141
202284
202336
202448
202547
202629

Wettest Day of Each Month

Dec: 54.4 mm (2.1 in)
Record daily precipitation for each month at Montague Siskiyou AP The wettest day on record for each calendar month at Montague Siskiyou AP. The most was 54.4 mm (2.1 in) on 30 December 2005. 0204060 Jan: 33.8 mm (1.3 in), 14 January 1952 Jan Feb: 39.1 mm (1.5 in), 6 February 2015 Feb Mar: 26.7 mm (1.1 in), 15 March 2011 Mar Apr: 27.4 mm (1.1 in), 30 April 2002 Apr May: 22.1 mm (0.9 in), 4 May 2024 May Jun: 22.9 mm (0.9 in), 20 June 2009 Jun Jul: 21.3 mm (0.8 in), 31 July 2011 Jul Aug: 44.7 mm (1.8 in), 5 August 2020 Aug Sep: 25.4 mm (1.0 in), 24 September 2014 Sep Oct: 37.1 mm (1.5 in), 25 October 2010 Oct Nov: 38.4 mm (1.5 in), 7 November 2005 Nov Dec: 54.4 mm (2.1 in), 30 December 2005 Dec
The wettest day on record for each calendar month at Montague Siskiyou AP. The most was 54.4 mm (2.1 in) on 30 December 2005.
Record daily precipitation for each month at Montague Siskiyou AP
MonthRecord daily precipitation (mm)Date
Jan33.8 mm (1.3 in)14 January 1952
Feb39.1 mm (1.5 in)6 February 2015
Mar26.7 mm (1.1 in)15 March 2011
Apr27.4 mm (1.1 in)30 April 2002
May22.1 mm (0.9 in)4 May 2024
Jun22.9 mm (0.9 in)20 June 2009
Jul21.3 mm (0.8 in)31 July 2011
Aug44.7 mm (1.8 in)5 August 2020
Sep25.4 mm (1.0 in)24 September 2014
Oct37.1 mm (1.5 in)25 October 2010
Nov38.4 mm (1.5 in)7 November 2005
Dec54.4 mm (2.1 in)30 December 2005

Period of Record Coverage

1948 to 2026
Days with data per year at Montague Siskiyou AP 32 years of record at Montague Siskiyou AP, 1948 to 2026. 4 years have data for under 90 percent of days and are left out of rankings: 1948, 1952, 1953, 2026. 1948: 184 of 366 days1949: 360 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 288 of 366 days1953: 31 of 365 days2001: 356 of 365 days2002: 358 of 365 days2003: 361 of 365 days2004: 362 of 366 days2005: 359 of 365 days2006: 363 of 365 days2007: 364 of 365 days2008: 361 of 366 days2009: 363 of 365 days2010: 364 of 365 days2011: 365 of 365 days2012: 364 of 366 days2013: 365 of 365 days2014: 365 of 365 days2015: 365 of 365 days2016: 364 of 366 days2017: 359 of 365 days2018: 362 of 365 days2019: 363 of 365 days2020: 366 of 366 days2021: 363 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 364 of 366 days2025: 362 of 365 days2026: 283 of 365 days195020052010201520202025
32 years of record at Montague Siskiyou AP, 1948 to 2026. 4 years have data for under 90 percent of days and are left out of rankings: 1948, 1952, 1953, 2026.
Days with data per year at Montague Siskiyou AP
YearDays with dataShare of yearComplete
194818450%No
194936099%Yes
1950365100%Yes
1951365100%Yes
195228879%No
1953318%No
200135698%Yes
200235898%Yes
200336199%Yes
200436299%Yes
200535998%Yes
200636399%Yes
2007364100%Yes
200836199%Yes
200936399%Yes
2010364100%Yes
2011365100%Yes
201236499%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
201636499%Yes
201735998%Yes
201836299%Yes
201936399%Yes
2020366100%Yes
202136399%Yes
2022365100%Yes
2023365100%Yes
202436499%Yes
202536299%Yes
202628378%No

Latest Records

20
Latest records at Montague Siskiyou AP
DateStationRecordValueBeat old record byOld record stoodSignificance
8 October 2026Montague Siskiyou AP, USmonthly high max (Tie, Provisional)33.9 C (93.0 F)tie0 years4 of 100 (Routine)
7 October 2026Montague Siskiyou AP, USmonthly high max (Provisional)33.9 C (93.0 F)0.6 C (1.1 F)74 years40 of 100 (Notable)
3 October 2026Montague Siskiyou AP, USdaily high max (Tie, Provisional)32.2 C (90.0 F)tie73 years7 of 100 (Routine)
15 September 2026Montague Siskiyou AP, USdaily low min (Provisional)2.2 C (36.0 F)1.1 C (2.0 F)8 years12 of 100 (Routine)
14 September 2026Montague Siskiyou AP, USdaily low min (Provisional)2.2 C (36.0 F)1.1 C (2.0 F)9 years12 of 100 (Routine)
13 September 2026Montague Siskiyou AP, USdaily low max (Provisional)20.0 C (68.0 F)1.7 C (3.1 F)21 years16 of 100 (Routine)
6 September 2026Montague Siskiyou AP, USdaily low max (Provisional)20.0 C (68.0 F)0.6 C (1.1 F)24 years15 of 100 (Routine)
5 September 2026Montague Siskiyou AP, USdaily rain (Provisional)4.8 mm (0.19 in)4.3 mm (0.17 in)12 years19 of 100 (Routine)
4 September 2026Montague Siskiyou AP, USdaily low min (Provisional)1.7 C (35.1 F)2.7 C (4.9 F)9 years17 of 100 (Routine)
4 September 2026Montague Siskiyou AP, USdaily low max (Provisional)18.9 C (66.0 F)0.5 C (0.9 F)11 years10 of 100 (Routine)
3 September 2026Montague Siskiyou AP, USdaily rain (Provisional)4.6 mm (0.18 in)4.6 mm (0.18 in)77 years20 of 100 (Routine)
3 September 2026Montague Siskiyou AP, USdaily low max (Provisional)16.1 C (61.0 F)7.2 C (13.0 F)11 years22 of 100 (Routine)
2 September 2026Montague Siskiyou AP, USdaily rain (Provisional)1.8 mm (0.07 in)1.8 mm (0.07 in)77 years20 of 100 (Routine)
2 September 2026Montague Siskiyou AP, USdaily low max (Provisional)16.7 C (62.1 F)4.4 C (7.9 F)21 years20 of 100 (Routine)
7 August 2026Montague Siskiyou AP, USdaily high max40.0 C (104.0 F)1.7 C (3.1 F)4 years12 of 100 (Routine)
6 August 2026Montague Siskiyou AP, USdaily high max38.9 C (102.0 F)1.7 C (3.1 F)20 years17 of 100 (Routine)
5 August 2026Montague Siskiyou AP, USdaily high max38.9 C (102.0 F)0.6 C (1.1 F)1 year8 of 100 (Routine)
20 July 2026Montague Siskiyou AP, USdaily high min (Tie)18.3 C (64.9 F)tie4 years2 of 100 (Routine)
18 July 2026Montague Siskiyou AP, USdaily low min (Tie)8.9 C (48.0 F)tie24 years3 of 100 (Routine)
2 July 2026Montague Siskiyou AP, USdaily low min5.0 C (41.0 F)0.6 C (1.1 F)5 years10 of 100 (Routine)

Climate Trend

28 complete years, 1949 to 2025
Annual mean temperature at Montague Siskiyou AP as warming stripes, 1949 to 2025 One stripe for each of 28 complete years at Montague Siskiyou AP, 1949 to 2025. Blue stripes are years cooler than the station's own mean of 11.4 C (52.5 F); red stripes are warmer. The coolest year was 2011, at 10.1 C (50.1 F), and the warmest was 2014, at 12.6 C (54.8 F). The strongest colour marks a difference of 1.4 C (2.5 F). 1949: 10.3 C, -1.1 C from the station mean1950: 11.0 C, -0.5 C from the station mean1951: 11.0 C, -0.4 C from the station mean2001: 11.4 C, 0.0 C from the station mean2002: 11.1 C, -0.3 C from the station mean2003: 11.7 C, +0.3 C from the station mean2004: 11.4 C, 0.0 C from the station mean2005: 10.6 C, -0.8 C from the station mean2006: 11.1 C, -0.3 C from the station mean2007: 10.7 C, -0.7 C from the station mean2008: 10.4 C, -1.0 C from the station mean2009: 11.0 C, -0.4 C from the station mean2010: 11.1 C, -0.3 C from the station mean2011: 10.1 C, -1.4 C from the station mean2012: 11.3 C, -0.1 C from the station mean2013: 10.8 C, -0.7 C from the station mean2014: 12.6 C, +1.2 C from the station mean2015: 12.6 C, +1.2 C from the station mean2016: 11.8 C, +0.4 C from the station mean2017: 11.2 C, -0.3 C from the station mean2018: 11.7 C, +0.2 C from the station mean2019: 11.6 C, +0.2 C from the station mean2020: 12.4 C, +0.9 C from the station mean2021: 12.4 C, +0.9 C from the station mean2022: 12.2 C, +0.8 C from the station mean2023: 11.9 C, +0.5 C from the station mean2024: 12.4 C, +1.0 C from the station mean2025: 11.7 C, +0.2 C from the station mean19491960197019801990200020102020
One stripe for each of 28 complete years at Montague Siskiyou AP, 1949 to 2025. Blue stripes are years cooler than the station's own mean of 11.4 C (52.5 F); red stripes are warmer. The coolest year was 2011, at 10.1 C (50.1 F), and the warmest was 2014, at 12.6 C (54.8 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Montague Siskiyou AP as warming stripes, 1949 to 2025
YearAnnual mean temperatureDifference from the station mean
194910.3 C-1.08 C
195011.0 C-0.45 C
195111.0 C-0.40 C
200111.4 C+0.04 C
200211.1 C-0.30 C
200311.7 C+0.32 C
200411.4 C+0.03 C
200510.6 C-0.79 C
200611.1 C-0.29 C
200710.7 C-0.70 C
200810.4 C-1.01 C
200911.0 C-0.38 C
201011.1 C-0.28 C
201110.1 C-1.35 C
201211.3 C-0.12 C
201310.8 C-0.65 C
201412.6 C+1.24 C
201512.6 C+1.23 C
201611.8 C+0.42 C
201711.2 C-0.25 C
201811.7 C+0.25 C
201911.6 C+0.17 C
202012.4 C+0.95 C
202112.4 C+0.95 C
202212.2 C+0.81 C
202311.9 C+0.49 C
202412.4 C+0.96 C
202511.7 C+0.25 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1948 to 2026
Yearly extremes at Montague Siskiyou AP: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)43.9 C (111.0 F)202240.3 C (104.5 F)32
Coldest night (TNn)-25.5 C (-13.9 F)2017-11.9 C (10.6 F)32
Wettest day (Rx1day)54.4 mm (2.1 in)200525.7 mm (1.0 in)31
Wettest five days (Rx5day)94.0 mm (3.7 in)200543.5 mm (1.7 in)31
Longest dry spell (CDD)180 days202467 days31

Hottest day (TXx)

Hottest day (TXx) at Montague Siskiyou AP by year The hottest day of the year at Montague Siskiyou AP, 1948 to 2026. The record is 43.9 C (111.0 F) in 2022, marked on the chart; the median year is 40.3 C (104.5 F). 10203040501960198020002020Record: 43.9 C (111.0 F) in 2022
The hottest day of the year at Montague Siskiyou AP, 1948 to 2026. The record is 43.9 C (111.0 F) in 2022, marked on the chart; the median year is 40.3 C (104.5 F).
Hottest day (TXx) at Montague Siskiyou AP by year
YearHottest day (TXx)
194836.7 C (98.1 F)
194938.9 C (102.0 F)
195040.0 C (104.0 F)
195137.8 C (100.0 F)
195238.3 C (100.9 F)
195313.9 C (57.0 F)
200138.9 C (102.0 F)
200242.8 C (109.0 F)
200341.7 C (107.1 F)
200438.3 C (100.9 F)
200539.4 C (102.9 F)
200640.0 C (104.0 F)
200740.6 C (105.1 F)
200840.6 C (105.1 F)
200940.6 C (105.1 F)
201039.4 C (102.9 F)
201136.7 C (98.1 F)
201240.0 C (104.0 F)
201341.1 C (106.0 F)
201441.1 C (106.0 F)
201541.1 C (106.0 F)
201641.1 C (106.0 F)
201741.7 C (107.1 F)
201839.4 C (102.9 F)
201939.4 C (102.9 F)
202040.6 C (105.1 F)
202142.8 C (109.0 F)
202243.9 C (111.0 F)
202341.7 C (107.1 F)
202443.9 C (111.0 F)
202540.6 C (105.1 F)
202640.0 C (104.0 F)

Coldest night (TNn)

Coldest night (TNn) at Montague Siskiyou AP by year The coldest night of the year at Montague Siskiyou AP, 1948 to 2026. The record is -25.5 C (-13.9 F) in 2017, marked on the chart; the median year is -11.9 C (10.6 F). -30-25-20-15-10-51960198020002020Record: -25.5 C (-13.9 F) in 2017
The coldest night of the year at Montague Siskiyou AP, 1948 to 2026. The record is -25.5 C (-13.9 F) in 2017, marked on the chart; the median year is -11.9 C (10.6 F).
Coldest night (TNn) at Montague Siskiyou AP by year
YearColdest night (TNn)
1948-13.3 C (8.1 F)
1949-19.4 C (-2.9 F)
1950-25.0 C (-13.0 F)
1951-14.4 C (6.1 F)
1952-20.6 C (-5.1 F)
1953-6.1 C (21.0 F)
2001-10.6 C (12.9 F)
2002-11.1 C (12.0 F)
2003-8.9 C (16.0 F)
2004-11.1 C (12.0 F)
2005-11.1 C (12.0 F)
2006-9.9 C (14.2 F)
2007-12.1 C (10.2 F)
2008-18.8 C (-1.8 F)
2009-17.7 C (0.1 F)
2010-9.9 C (14.2 F)
2011-15.5 C (4.1 F)
2012-13.8 C (7.2 F)
2013-22.7 C (-8.9 F)
2014-12.1 C (10.2 F)
2015-13.2 C (8.2 F)
2016-11.6 C (11.1 F)
2017-25.5 C (-13.9 F)
2018-11.6 C (11.1 F)
2019-11.6 C (11.1 F)
2020-10.5 C (13.1 F)
2021-8.2 C (17.2 F)
2022-12.7 C (9.1 F)
2023-11.0 C (12.2 F)
2024-10.5 C (13.1 F)
2025-17.7 C (0.1 F)
2026-11.7 C (10.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Montague Siskiyou AP by year The wettest day of the year at Montague Siskiyou AP, 1948 to 2026. The record is 54.4 mm (2.1 in) in 2005, marked on the chart; the median year is 25.7 mm (1.0 in). 02040601960198020002020Record: 54.4 mm (2.1 in) in 2005
The wettest day of the year at Montague Siskiyou AP, 1948 to 2026. The record is 54.4 mm (2.1 in) in 2005, marked on the chart; the median year is 25.7 mm (1.0 in).
Wettest day (Rx1day) at Montague Siskiyou AP by year
YearWettest day (Rx1day)
194825.9 mm (1.0 in)
194915.5 mm (0.6 in)
195028.4 mm (1.1 in)
195125.7 mm (1.0 in)
195233.8 mm (1.3 in)
1953n/a
200125.4 mm (1.0 in)
200239.1 mm (1.5 in)
200315.5 mm (0.6 in)
200447.0 mm (1.9 in)
200554.4 mm (2.1 in)
200622.6 mm (0.9 in)
200736.3 mm (1.4 in)
200832.5 mm (1.3 in)
200922.9 mm (0.9 in)
201037.1 mm (1.5 in)
201126.7 mm (1.1 in)
201224.6 mm (1.0 in)
201318.3 mm (0.7 in)
201425.4 mm (1.0 in)
201539.1 mm (1.5 in)
201631.2 mm (1.2 in)
201712.7 mm (0.5 in)
201820.8 mm (0.8 in)
201925.9 mm (1.0 in)
202044.7 mm (1.8 in)
202116.3 mm (0.6 in)
202215.0 mm (0.6 in)
202321.6 mm (0.9 in)
202422.1 mm (0.9 in)
202533.5 mm (1.3 in)
202620.1 mm (0.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Montague Siskiyou AP by year The wettest five days of the year at Montague Siskiyou AP, 1948 to 2026. The record is 94.0 mm (3.7 in) in 2005, marked on the chart; the median year is 43.5 mm (1.7 in). 204060801001960198020002020Record: 94.0 mm (3.7 in) in 2005
The wettest five days of the year at Montague Siskiyou AP, 1948 to 2026. The record is 94.0 mm (3.7 in) in 2005, marked on the chart; the median year is 43.5 mm (1.7 in).
Wettest five days (Rx5day) at Montague Siskiyou AP by year
YearWettest five days (Rx5day)
194827.7 mm (1.1 in)
194924.6 mm (1.0 in)
195070.1 mm (2.8 in)
195160.6 mm (2.4 in)
195234.9 mm (1.4 in)
1953n/a
200131.3 mm (1.2 in)
200287.8 mm (3.5 in)
200350.0 mm (2.0 in)
200461.8 mm (2.4 in)
200594.0 mm (3.7 in)
200686.4 mm (3.4 in)
200749.3 mm (1.9 in)
200843.5 mm (1.7 in)
200929.5 mm (1.2 in)
201047.8 mm (1.9 in)
201137.9 mm (1.5 in)
201258.7 mm (2.3 in)
201328.9 mm (1.1 in)
201443.4 mm (1.7 in)
201573.2 mm (2.9 in)
201652.3 mm (2.1 in)
201733.6 mm (1.3 in)
201830.7 mm (1.2 in)
201947.5 mm (1.9 in)
202044.7 mm (1.8 in)
202137.1 mm (1.5 in)
202234.8 mm (1.4 in)
202327.5 mm (1.1 in)
202433.2 mm (1.3 in)
202559.0 mm (2.3 in)
202634.0 mm (1.3 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Montague Siskiyou AP by year The longest dry spell of the year at Montague Siskiyou AP, 1948 to 2026. The record is 180 days in 2024, marked on the chart; the median year is 67 days. 0501001502001960198020002020Record: 180 days in 2024
The longest dry spell of the year at Montague Siskiyou AP, 1948 to 2026. The record is 180 days in 2024, marked on the chart; the median year is 67 days.
Longest dry spell (CDD) at Montague Siskiyou AP by year
YearLongest dry spell (CDD)
194834 days
194977 days
195050 days
195152 days
195228 days
1953n/a
200150 days
200287 days
200382 days
200457 days
200555 days
200659 days
200785 days
200878 days
2009114 days
201065 days
201164 days
201291 days
201345 days
201464 days
201595 days
201674 days
201773 days
201869 days
201968 days
202094 days
202187 days
202254 days
202361 days
2024180 days
202536 days
202667 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

28 years with a frost

Across 28 years with a frost, the median last spring frost at Montague Siskiyou AP falls on 14 May and the median first autumn frost on 7 October, which leaves a median of 146 days between them.

Fitted over all years, the growing season changes by +1.6 days per decade at this station.

Frost dates and growing season at Montague Siskiyou AP
MeasureMedian, all yearsEarliest periodRecent period (1949 to 2025)Recent against earliestFitted trend
Last spring frost14 Mayn/a14 Mayn/a-0.7 days per decade
First autumn frost7 Octobern/a7 Octobern/a+0.9 days per decade
Growing days146 daysn/a146 daysn/a+1.6 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.

Download the Data

  • Data for Montague Siskiyou AP standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Montague Siskiyou 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).