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Built 2026-10-19 (19 October 2026)

Cottonwood 2 WSW Threshold Days by Year (USC00102159)

14 fixed thresholds counted per year at Cottonwood 2 WSW (USC00102159): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Cottonwood 2 WSW Thresholds

  • Cottonwood 2 WSW: days with a maximum temperature at or above 30 C (86 F) in 45 years, most in 2017 with 47.
  • Cottonwood 2 WSW: days with a maximum temperature at or below 0 C (32 F) in 45 years, most in 1985 with 61.
  • Cottonwood 2 WSW: days with 10 mm (0.39 in) or more of precipitation in 45 years, most in 1995 with 24.
  • Cottonwood 2 WSW: nights with a minimum temperature at or below 0 C (32 F) in 43 years, most in 1984 with 170.
  • 14 fixed thresholds have at least one qualifying day at Cottonwood 2 WSW.
45 years with a qualifying day
Days at or above 30 C (86 F) per year at Cottonwood 2 WSW Days per year at Cottonwood 2 WSW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 47 in 2017. 02040601977: 191978: 121979: 151980: 41981: 261982: 91983: 81984: 121985: 171986: 101987: 91988: 181989: 51990: 231991: 141992: 201993: 21994: 261995: 41996: 231997: 91998: 301999: 132000: 162001: 222002: 142003: 352004: 162005: 222006: 252007: 312008: 152009: 242013: 282015: 332016: 152017: 472018: 282019: 152020: 172022: 372023: 212024: 342025: 352026: 14197719821987199219972002200720162022
Days per year at Cottonwood 2 WSW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 47 in 2017.
Days at or above 30 C (86 F) per year at Cottonwood 2 WSW
YearDaysDecade average
19771915.3
19781215.3
19791515.3
1980411.8
19812611.8
1982911.8
1983811.8
19841211.8
19851711.8
19861011.8
1987911.8
19881811.8
1989511.8
19902316.4
19911416.4
19922016.4
1993216.4
19942616.4
1995416.4
19962316.4
1997916.4
19983016.4
19991316.4
20001622
20012222
20021422
20033522
20041622
20052222
20062522
20073122
20081522
20092422
20132827.7
20153327.7
20161527.7
20174727.7
20182827.7
20191527.7
20201726.3
20223726.3
20232126.3
20243426.3
20253526.3
20261426.3
First to last qualifying date each year at Cottonwood 2 WSW For each year, a bar from the first to the last day at Cottonwood 2 WSW meeting 30 C (86 F). 1977: 6 June 1977 to 19 August 19771978: 14 July 1978 to 9 August 19781979: 28 June 1979 to 16 September 19791980: 22 July 1980 to 29 July 19801981: 25 June 1981 to 18 September 19811982: 27 July 1982 to 21 August 19821983: 30 July 1983 to 8 August 19831984: 28 June 1984 to 16 August 19841985: 2 July 1985 to 29 July 19851986: 2 August 1986 to 28 August 19861987: 14 June 1987 to 23 September 19871988: 20 July 1988 to 5 September 19881989: 14 July 1989 to 7 August 19891990: 29 June 1990 to 14 September 19901991: 12 July 1991 to 30 August 19911992: 22 June 1992 to 1 October 19921993: 28 July 1993 to 29 July 19931994: 17 July 1994 to 7 September 19941995: 28 July 1995 to 2 September 19951996: 7 June 1996 to 11 September 19961997: 5 July 1997 to 1 September 19971998: 9 July 1998 to 15 September 19981999: 15 June 1999 to 27 August 19992000: 21 July 2000 to 14 September 20002001: 3 July 2001 to 24 September 20012002: 26 June 2002 to 14 September 20022003: 24 May 2003 to 6 September 20032004: 14 July 2004 to 31 August 20042005: 21 June 2005 to 28 August 20052006: 16 May 2006 to 5 September 20062007: 3 June 2007 to 3 September 20072008: 29 June 2008 to 24 August 20082009: 3 July 2009 to 24 September 20092013: 1 July 2013 to 14 September 20132015: 8 June 2015 to 12 September 20152016: 21 July 2016 to 29 August 20162017: 7 June 2017 to 12 September 20172018: 3 June 2018 to 19 August 20182019: 22 July 2019 to 3 September 20192020: 21 July 2020 to 5 September 20202022: 27 June 2022 to 27 September 20222023: 9 July 2023 to 28 August 20232024: 7 July 2024 to 9 September 20242025: 31 May 2025 to 5 September 20252026: 7 July 2026 to 31 July 202619771983198919952001200720172024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Cottonwood 2 WSW meeting 30 C (86 F).
First to last qualifying date each year at Cottonwood 2 WSW
YearFirst dateLast date
19771977-06-061977-08-19
19781978-07-141978-08-09
19791979-06-281979-09-16
19801980-07-221980-07-29
19811981-06-251981-09-18
19821982-07-271982-08-21
19831983-07-301983-08-08
19841984-06-281984-08-16
19851985-07-021985-07-29
19861986-08-021986-08-28
19871987-06-141987-09-23
19881988-07-201988-09-05
19891989-07-141989-08-07
19901990-06-291990-09-14
19911991-07-121991-08-30
19921992-06-221992-10-01
19931993-07-281993-07-29
19941994-07-171994-09-07
19951995-07-281995-09-02
19961996-06-071996-09-11
19971997-07-051997-09-01
19981998-07-091998-09-15
19991999-06-151999-08-27
20002000-07-212000-09-14
20012001-07-032001-09-24
20022002-06-262002-09-14
20032003-05-242003-09-06
20042004-07-142004-08-31
20052005-06-212005-08-28
20062006-05-162006-09-05
20072007-06-032007-09-03
20082008-06-292008-08-24
20092009-07-032009-09-24
20132013-07-012013-09-14
20152015-06-082015-09-12
20162016-07-212016-08-29
20172017-06-072017-09-12
20182018-06-032018-08-19
20192019-07-222019-09-03
20202020-07-212020-09-05
20222022-06-272022-09-27
20232023-07-092023-08-28
20242024-07-072024-09-09
20252025-05-312025-09-05
20262026-07-072026-07-31

Every Fixed Threshold

Fixed thresholds at Cottonwood 2 WSW
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days4547201714
35 C (95 F): Days19720242
90 F (32.2 C): Days422120246
100 F (37.8 C): Days3120151
0 C (32 F): Ice days (max456119857
0 C (32 F): Frost days (min43170198458
-10 C (14 F): Days with min434019852
-20 C (-4 F): Days with min15619902
20 C (68 F): Tropical nights (min27920151
10 mm (0.39 in): Days with 10 mm or more rain452419958
25 mm (0.98 in): Days with 25 mm or more rain33319771
50 mm (1.97 in): Days with 50 mm or more rain3119821
10 cm (3.9 in): Days with 10 cm or more snowfall23920094
25 cm (9.8 in): Days with 25 cm or more snowfall3219991

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1977.

Download the Data

  • Data for Cottonwood 2 WSW 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-12).