Diamond Valley - Eureka 14NNW Threshold Days by Year (USC00262296)
13 fixed thresholds counted per year at Diamond Valley - Eureka 14NNW (USC00262296): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Diamond Valley - Eureka 14NNW Thresholds
- Diamond Valley - Eureka 14NNW: nights with a minimum temperature at or below 0 C (32 F) in 23 years, most in 1985 with 234.
- Diamond Valley - Eureka 14NNW: nights with a minimum temperature at or below -10 C (14 F) in 23 years, most in 1985 with 115.
- Diamond Valley - Eureka 14NNW: days with 10 mm (0.39 in) or more of precipitation in 23 years, most in 1996 with 12.
- Diamond Valley - Eureka 14NNW: nights with a minimum temperature at or below -20 C (-4 F) in 22 years, most in 1985 with 42.
- 13 fixed thresholds have at least one qualifying day at Diamond Valley - Eureka 14NNW.
Days at or above 30 C (86 F)
21 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1985 | 41 | 50.8 |
| 1987 | 40 | 50.8 |
| 1988 | 73 | 50.8 |
| 1989 | 49 | 50.8 |
| 1990 | 63 | 53.3 |
| 1991 | 48 | 53.3 |
| 1992 | 45 | 53.3 |
| 1993 | 40 | 53.3 |
| 1994 | 70 | 53.3 |
| 1995 | 48 | 53.3 |
| 1996 | 71 | 53.3 |
| 1998 | 53 | 53.3 |
| 1999 | 42 | 53.3 |
| 2000 | 66 | 60.8 |
| 2001 | 66 | 60.8 |
| 2002 | 59 | 60.8 |
| 2006 | 52 | 60.8 |
| 2012 | 57 | 50.5 |
| 2013 | 46 | 50.5 |
| 2014 | 43 | 50.5 |
| 2015 | 56 | 50.5 |
| Year | First date | Last date |
|---|---|---|
| 1985 | 1985-06-06 | 1985-08-26 |
| 1987 | 1987-06-13 | 1987-09-02 |
| 1988 | 1988-06-03 | 1988-09-09 |
| 1989 | 1989-06-14 | 1989-08-29 |
| 1990 | 1990-06-08 | 1990-09-14 |
| 1991 | 1991-06-11 | 1991-09-04 |
| 1992 | 1992-06-01 | 1992-09-22 |
| 1993 | 1993-06-14 | 1993-09-11 |
| 1994 | 1994-06-10 | 1994-09-06 |
| 1995 | 1995-06-12 | 1995-09-15 |
| 1996 | 1996-06-03 | 1996-10-10 |
| 1998 | 1998-06-28 | 1998-09-04 |
| 1999 | 1999-06-14 | 1999-09-09 |
| 2000 | 2000-05-22 | 2000-09-17 |
| 2001 | 2001-05-23 | 2001-09-21 |
| 2002 | 2002-05-30 | 2002-09-24 |
| 2006 | 2006-06-03 | 2006-09-05 |
| 2012 | 2012-06-01 | 2012-09-05 |
| 2013 | 2013-05-13 | 2013-08-30 |
| 2014 | 2014-06-09 | 2014-09-16 |
| 2015 | 2015-06-13 | 2015-09-12 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 21 | 73 | 1988 | 56 |
| 35 C (95 F): Days | 18 | 12 | 1985 | 4 |
| 40 C (104 F): Days | 1 | 1 | 1985 | 1 |
| 90 F (32.2 C): Days | 21 | 43 | 1994 | 24 |
| 100 F (37.8 C): Days | 4 | 3 | 1998 | 1 |
| 0 C (32 F): Ice days (max | 21 | 33 | 2013 | 19 |
| 0 C (32 F): Frost days (min | 23 | 234 | 1985 | 184 |
| -10 C (14 F): Days with min | 23 | 115 | 1985 | 41 |
| -20 C (-4 F): Days with min | 22 | 42 | 1985 | 6 |
| -30 C (-22 F): Days with min | 7 | 6 | 1990 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 23 | 12 | 1996 | 9 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 5 | 3 | 2015 | 3 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 2 | 3 | 2015 | 3 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1985.
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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2025-12-31).