Cooskie Mountain California Weather Records (USR0000CCOO)
Record envelope, standing records and threshold days for Cooskie Mountain California (USR0000CCOO), California, United States, with 39 years of record.
Key Facts for Cooskie Mountain California
- Cooskie Mountain California (USR0000CCOO) is a weather station in California, United States at 40.26 latitude and -124.27 longitude, 899 m (2,950 ft) above sea level.
- The station reports from 1985 to 2023, 39 years of record.
- 1,464 records set at Cooskie Mountain California still stand.
- Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
- Cooskie Mountain California set a daily record high maximum temperature of 33.3 C (91.9 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, 40.26 latitude, -124.27 longitude.
- Elevation: 899 m (2,950 ft).
- Period of record: 1985 to 2023, 39 years.
- Eligible elements: tmax, tmin.
Daily Record Envelope and 2026
15 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 28.3 C (82.9 F) | -3.9 C (25.0 F) | 24.4 C (75.9 F) | 0.0 C (32.0 F) |
| Feb | 26.7 C (80.1 F) | -7.2 C (19.0 F) | 22.8 C (73.0 F) | -2.8 C (27.0 F) |
| Mar | 28.9 C (84.0 F) | -3.9 C (25.0 F) | 28.9 C (84.0 F) | 0.6 C (33.1 F) |
| Apr | 36.7 C (98.1 F) | -2.2 C (28.0 F) | 23.3 C (73.9 F) | -0.6 C (30.9 F) |
| May | 35.0 C (95.0 F) | -0.6 C (30.9 F) | 28.3 C (82.9 F) | 2.8 C (37.0 F) |
| Jun | 37.8 C (100.0 F) | 1.7 C (35.1 F) | 33.3 C (91.9 F) | 3.9 C (39.0 F) |
| Jul | 38.9 C (102.0 F) | 3.9 C (39.0 F) | 31.7 C (89.1 F) | 7.8 C (46.0 F) |
| Aug | 40.0 C (104.0 F) | 5.6 C (42.1 F) | 35.0 C (95.0 F) | 9.4 C (48.9 F) |
| Sep | 40.0 C (104.0 F) | 3.3 C (37.9 F) | 31.7 C (89.1 F) | 6.7 C (44.1 F) |
| Oct | 37.8 C (100.0 F) | 1.1 C (34.0 F) | 33.3 C (91.9 F) | 3.3 C (37.9 F) |
| Nov | 29.4 C (84.9 F) | -3.3 C (26.1 F) | n/a | n/a |
| Dec | 25.6 C (78.1 F) | -16.1 C (3.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1985 | 39 |
| 1986 | 35 |
| 1987 | 50 |
| 1988 | 59 |
| 1989 | 53 |
| 1990 | 58 |
| 1991 | 56 |
| 1992 | 22 |
| 1993 | 43 |
| 1994 | 32 |
| 1995 | 33 |
| 1996 | 48 |
| 1997 | 12 |
| 1998 | 34 |
| 1999 | 57 |
| 2000 | 23 |
| 2001 | 28 |
| 2002 | 54 |
| 2003 | 42 |
| 2004 | 22 |
| 2005 | 32 |
| 2006 | 29 |
| 2007 | 26 |
| 2008 | 63 |
| 2009 | 48 |
| 2010 | 35 |
| 2011 | 23 |
| 2012 | 40 |
| 2013 | 32 |
| 2014 | 17 |
| 2015 | 29 |
| 2016 | 61 |
| 2017 | 35 |
| 2018 | 11 |
| 2019 | 28 |
| 2020 | 12 |
| 2021 | 24 |
| 2022 | 26 |
| 2023 | 30 |
| 2024 | 16 |
| 2025 | 22 |
| 2026 | 25 |
Period of Record Coverage
1985 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1985 | 204 | 56% | No |
| 1986 | 348 | 95% | Yes |
| 1987 | 348 | 95% | Yes |
| 1988 | 338 | 92% | Yes |
| 1989 | 346 | 95% | Yes |
| 1990 | 362 | 99% | Yes |
| 1991 | 364 | 100% | Yes |
| 1992 | 357 | 98% | Yes |
| 1993 | 343 | 94% | Yes |
| 1994 | 331 | 91% | Yes |
| 1995 | 360 | 99% | Yes |
| 1996 | 353 | 96% | Yes |
| 1997 | 360 | 99% | Yes |
| 1998 | 333 | 91% | Yes |
| 1999 | 346 | 95% | Yes |
| 2000 | 364 | 99% | Yes |
| 2001 | 363 | 99% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 363 | 99% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 362 | 99% | Yes |
| 2007 | 364 | 100% | Yes |
| 2008 | 365 | 100% | Yes |
| 2009 | 359 | 98% | Yes |
| 2010 | 335 | 92% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 362 | 99% | Yes |
| 2013 | 364 | 100% | Yes |
| 2014 | 364 | 100% | Yes |
| 2015 | 361 | 99% | Yes |
| 2016 | 349 | 95% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 363 | 99% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 363 | 99% | Yes |
| 2022 | 311 | 85% | No |
| 2023 | 317 | 87% | No |
| 2024 | 365 | 100% | Yes |
| 2025 | 364 | 100% | Yes |
| 2026 | 260 | 71% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 8 October 2026 | Cooskie Mountain California, US | daily high max (Provisional) | 33.3 C (91.9 F) | 2.2 C (4.0 F) | 29 years | 15 of 100 (Routine) |
| 7 October 2026 | Cooskie Mountain California, US | monthly high min (Tie, Provisional) | 24.4 C (75.9 F) | tie | 34 years | 6 of 100 (Routine) |
| 6 October 2026 | Cooskie Mountain California, US | daily high min (Provisional) | 23.9 C (75.0 F) | 1.1 C (2.0 F) | 1 year | 6 of 100 (Routine) |
| 6 October 2026 | Cooskie Mountain California, US | daily high max (Tie, Provisional) | 32.8 C (91.0 F) | tie | 39 years | 3 of 100 (Routine) |
| 5 October 2026 | Cooskie Mountain California, US | daily high min (Provisional) | 23.9 C (75.0 F) | 1.1 C (2.0 F) | 39 years | 17 of 100 (Routine) |
| 4 October 2026 | Cooskie Mountain California, US | daily high min (Provisional) | 23.3 C (73.9 F) | 1.1 C (2.0 F) | 12 years | 9 of 100 (Routine) |
| 3 October 2026 | Cooskie Mountain California, US | daily high min (Provisional) | 23.3 C (73.9 F) | 1.1 C (2.0 F) | 35 years | 16 of 100 (Routine) |
| 2 September 2026 | Cooskie Mountain California, US | daily low max (Provisional) | 11.7 C (53.1 F) | 0.5 C (0.9 F) | 3 years | 4 of 100 (Routine) |
| 1 September 2026 | Cooskie Mountain California, US | daily low max (Provisional) | 13.3 C (55.9 F) | 1.1 C (2.0 F) | 32 years | 14 of 100 (Routine) |
| 6 August 2026 | Cooskie Mountain California, US | daily high min | 23.3 C (73.9 F) | 1.1 C (2.0 F) | 20 years | 12 of 100 (Routine) |
| 4 August 2026 | Cooskie Mountain California, US | daily high min | 25.0 C (77.0 F) | 1.7 C (3.1 F) | 39 years | 18 of 100 (Routine) |
| 3 August 2026 | Cooskie Mountain California, US | daily high max (Tie) | 34.4 C (93.9 F) | tie | 13 years | 2 of 100 (Routine) |
| 17 June 2026 | Cooskie Mountain California, US | daily high min | 21.1 C (70.0 F) | 4.4 C (7.9 F) | 25 years | 20 of 100 (Routine) |
| 17 June 2026 | Cooskie Mountain California, US | daily high max (Tie) | 30.0 C (86.0 F) | tie | 40 years | 4 of 100 (Routine) |
| 16 June 2026 | Cooskie Mountain California, US | daily high min | 18.3 C (64.9 F) | 1.6 C (2.9 F) | 3 years | 7 of 100 (Routine) |
| 15 June 2026 | Cooskie Mountain California, US | daily high min | 23.3 C (73.9 F) | 6.6 C (11.9 F) | 25 years | 25 of 100 (Routine) |
| 15 June 2026 | Cooskie Mountain California, US | daily high max | 31.7 C (89.1 F) | 6.1 C (11.0 F) | 7 years | 16 of 100 (Routine) |
| 14 June 2026 | Cooskie Mountain California, US | daily high max | 33.3 C (91.9 F) | 7.7 C (13.9 F) | 25 years | 23 of 100 (Routine) |
| 14 June 2026 | Cooskie Mountain California, US | daily high min | 22.2 C (72.0 F) | 4.4 C (7.9 F) | 25 years | 20 of 100 (Routine) |
| 13 June 2026 | Cooskie Mountain California, US | daily high min | 21.7 C (71.1 F) | 2.8 C (5.0 F) | 17 years | 15 of 100 (Routine) |
Climate Trend
31 complete years, 1986 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1986 | 11.8 C | -0.10 C |
| 1987 | 11.5 C | -0.40 C |
| 1990 | 10.8 C | -1.11 C |
| 1991 | 11.7 C | -0.14 C |
| 1992 | 12.5 C | +0.65 C |
| 1993 | 10.5 C | -1.39 C |
| 1995 | 11.6 C | -0.26 C |
| 1997 | 11.2 C | -0.70 C |
| 2000 | 11.0 C | -0.85 C |
| 2001 | 11.1 C | -0.73 C |
| 2002 | 12.0 C | +0.14 C |
| 2003 | 11.9 C | +0.04 C |
| 2004 | 12.1 C | +0.21 C |
| 2005 | 12.0 C | +0.16 C |
| 2006 | 13.5 C | +1.59 C |
| 2007 | 11.1 C | -0.74 C |
| 2008 | 11.4 C | -0.48 C |
| 2009 | 11.7 C | -0.13 C |
| 2011 | 10.7 C | -1.13 C |
| 2012 | 11.3 C | -0.62 C |
| 2013 | 12.3 C | +0.47 C |
| 2014 | 13.1 C | +1.21 C |
| 2015 | 13.3 C | +1.47 C |
| 2016 | 13.6 C | +1.77 C |
| 2017 | 11.8 C | -0.03 C |
| 2018 | 11.9 C | +0.04 C |
| 2019 | 11.3 C | -0.55 C |
| 2020 | 12.6 C | +0.72 C |
| 2021 | 11.8 C | -0.04 C |
| 2024 | 12.2 C | +0.32 C |
| 2025 | 12.5 C | +0.67 C |
The annual mean temperature here has risen by 0.28 C (0.04 to 0.53) per decade over 1986 to 2025. In Fahrenheit: 0.5 F (0.1 to 1.0) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.28 C (0.04 to 0.53) per decade | 0.5 F (0.1 to 1.0) per decade | 1986 to 2025 | 31 | Rise |
| Mean daily maximum | 0.4 C (0.1 to 0.6) per decade | 0.7 F (0.2 to 1.1) per decade | 1986 to 2025 | 31 | Rise |
| Mean daily minimum | 0.2 C (-0.1 to 0.5) per decade | 0.4 F (-0.1 to 0.8) per decade | 1986 to 2025 | 31 | Not 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
1985 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 40.0 C (104.0 F) | 1998 | 37.0 C (98.5 F) | 42 |
| Coldest night (TNn) | -16.1 C (3.0 F) | 1998 | -3.0 C (26.5 F) | 42 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1985 | 35.0 C (95.0 F) |
| 1986 | 35.0 C (95.0 F) |
| 1987 | 35.6 C (96.1 F) |
| 1988 | 37.2 C (99.0 F) |
| 1989 | 31.7 C (89.1 F) |
| 1990 | 36.1 C (97.0 F) |
| 1991 | 37.2 C (99.0 F) |
| 1992 | 36.7 C (98.1 F) |
| 1993 | 37.8 C (100.0 F) |
| 1994 | 37.2 C (99.0 F) |
| 1995 | 35.6 C (96.1 F) |
| 1996 | 36.7 C (98.1 F) |
| 1997 | 32.8 C (91.0 F) |
| 1998 | 40.0 C (104.0 F) |
| 1999 | 38.3 C (100.9 F) |
| 2000 | 36.7 C (98.1 F) |
| 2001 | 36.1 C (97.0 F) |
| 2002 | 40.0 C (104.0 F) |
| 2003 | 38.9 C (102.0 F) |
| 2004 | 37.2 C (99.0 F) |
| 2005 | 37.2 C (99.0 F) |
| 2006 | 38.9 C (102.0 F) |
| 2007 | 32.8 C (91.0 F) |
| 2008 | 38.9 C (102.0 F) |
| 2009 | 37.2 C (99.0 F) |
| 2010 | 37.8 C (100.0 F) |
| 2011 | 38.3 C (100.9 F) |
| 2012 | 37.8 C (100.0 F) |
| 2013 | 36.1 C (97.0 F) |
| 2014 | 33.9 C (93.0 F) |
| 2015 | 35.6 C (96.1 F) |
| 2016 | 36.7 C (98.1 F) |
| 2017 | 37.2 C (99.0 F) |
| 2018 | 33.3 C (91.9 F) |
| 2019 | 33.9 C (93.0 F) |
| 2020 | 38.9 C (102.0 F) |
| 2021 | 35.0 C (95.0 F) |
| 2022 | 40.0 C (104.0 F) |
| 2023 | 37.2 C (99.0 F) |
| 2024 | 37.8 C (100.0 F) |
| 2025 | 34.4 C (93.9 F) |
| 2026 | 35.0 C (95.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1985 | -2.8 C (27.0 F) |
| 1986 | 0.0 C (32.0 F) |
| 1987 | -3.3 C (26.1 F) |
| 1988 | -3.9 C (25.0 F) |
| 1989 | -7.2 C (19.0 F) |
| 1990 | -10.0 C (14.0 F) |
| 1991 | -2.2 C (28.0 F) |
| 1992 | -1.7 C (28.9 F) |
| 1993 | -3.9 C (25.0 F) |
| 1994 | -2.8 C (27.0 F) |
| 1995 | -2.8 C (27.0 F) |
| 1996 | -3.3 C (26.1 F) |
| 1997 | -3.9 C (25.0 F) |
| 1998 | -16.1 C (3.0 F) |
| 1999 | -2.2 C (28.0 F) |
| 2000 | -0.6 C (30.9 F) |
| 2001 | -2.2 C (28.0 F) |
| 2002 | -3.9 C (25.0 F) |
| 2003 | -1.1 C (30.0 F) |
| 2004 | -1.7 C (28.9 F) |
| 2005 | -1.1 C (30.0 F) |
| 2006 | -2.2 C (28.0 F) |
| 2007 | -2.8 C (27.0 F) |
| 2008 | -3.9 C (25.0 F) |
| 2009 | -5.0 C (23.0 F) |
| 2010 | -2.8 C (27.0 F) |
| 2011 | -4.4 C (24.1 F) |
| 2012 | -3.9 C (25.0 F) |
| 2013 | -7.2 C (19.0 F) |
| 2014 | -1.1 C (30.0 F) |
| 2015 | -0.6 C (30.9 F) |
| 2016 | -2.2 C (28.0 F) |
| 2017 | -3.3 C (26.1 F) |
| 2018 | -5.0 C (23.0 F) |
| 2019 | -4.4 C (24.1 F) |
| 2020 | -3.3 C (26.1 F) |
| 2021 | -3.3 C (26.1 F) |
| 2022 | -3.9 C (25.0 F) |
| 2023 | -5.6 C (21.9 F) |
| 2024 | -2.8 C (27.0 F) |
| 2025 | -2.8 C (27.0 F) |
| 2026 | -2.8 C (27.0 F) |
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
26 years with a frostAcross 26 years with a frost, the median last spring frost at Cooskie Mountain California falls on 14 April and the median first autumn frost on 28 November, which leaves a median of 227 days between them.
Fitted over all years, the growing season changes by -5.3 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1987 to 2021) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 14 April | n/a | 14 April | n/a | +4.1 days per decade |
| First autumn frost | 28 November | n/a | 28 November | n/a | -1.1 days per decade |
| Growing days | 227 days | n/a | 227 days | n/a | -5.3 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.
Download the Data
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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-13).