Mullen 21 NW Threshold Days by Year
17 fixed thresholds counted per year at Mullen 21 NW (USC00255702): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Mullen 21 NW Thresholds
- Mullen 21 NW: days with 10 mm (0.39 in) or more of precipitation in 40 years, most in 1951 with 29.
- Mullen 21 NW: days with 25 mm (0.98 in) or more of precipitation in 39 years, most in 1986 with 12.
- Mullen 21 NW: days with a maximum temperature at or above 30 C (86 F) in 37 years, most in 2000 with 80.
- Mullen 21 NW: days with a maximum temperature at or above 35 C (95 F) in 37 years, most in 2002 with 27.
- 17 fixed thresholds have at least one qualifying day at Mullen 21 NW.
Days at or above 30 C (86 F)
37 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1954 | 52 | 57 |
| 1956 | 67 | 57 |
| 1957 | 52 | 57 |
| 1961 | 60 | 49.3 |
| 1962 | 39 | 49.3 |
| 1963 | 65 | 49.3 |
| 1964 | 53 | 49.3 |
| 1965 | 31 | 49.3 |
| 1966 | 58 | 49.3 |
| 1967 | 41 | 49.3 |
| 1968 | 50 | 49.3 |
| 1969 | 47 | 49.3 |
| 1970 | 72 | 60.8 |
| 1971 | 50 | 60.8 |
| 1974 | 61 | 60.8 |
| 1975 | 57 | 60.8 |
| 1976 | 64 | 60.8 |
| 1982 | 46 | 54.6 |
| 1984 | 51 | 54.6 |
| 1985 | 61 | 54.6 |
| 1986 | 40 | 54.6 |
| 1987 | 62 | 54.6 |
| 1988 | 68 | 54.6 |
| 1989 | 54 | 54.6 |
| 1990 | 50 | 45.3 |
| 1991 | 47 | 45.3 |
| 1992 | 29 | 45.3 |
| 1993 | 23 | 45.3 |
| 1994 | 50 | 45.3 |
| 1995 | 55 | 45.3 |
| 1996 | 43 | 45.3 |
| 1997 | 51 | 45.3 |
| 1998 | 53 | 45.3 |
| 1999 | 52 | 45.3 |
| 2000 | 80 | 69 |
| 2001 | 59 | 69 |
| 2002 | 68 | 69 |
| Year | First date | Last date |
|---|---|---|
| 1954 | 1954-05-21 | 1954-10-08 |
| 1956 | 1956-05-18 | 1956-10-12 |
| 1957 | 1957-05-07 | 1957-09-29 |
| 1961 | 1961-04-20 | 1961-10-17 |
| 1962 | 1962-04-25 | 1962-10-11 |
| 1963 | 1963-05-07 | 1963-10-06 |
| 1964 | 1964-04-17 | 1964-09-26 |
| 1965 | 1965-04-30 | 1965-08-27 |
| 1966 | 1966-05-05 | 1966-09-25 |
| 1967 | 1967-05-23 | 1967-10-04 |
| 1968 | 1968-05-02 | 1968-10-16 |
| 1969 | 1969-05-15 | 1969-09-29 |
| 1970 | 1970-05-08 | 1970-10-05 |
| 1971 | 1971-04-16 | 1971-09-14 |
| 1974 | 1974-05-20 | 1974-09-27 |
| 1975 | 1975-04-27 | 1975-10-07 |
| 1976 | 1976-06-02 | 1976-10-03 |
| 1982 | 1982-06-28 | 1982-09-11 |
| 1984 | 1984-06-21 | 1984-09-22 |
| 1985 | 1985-04-18 | 1985-09-19 |
| 1986 | 1986-05-05 | 1986-09-10 |
| 1987 | 1987-04-18 | 1987-09-27 |
| 1988 | 1988-04-08 | 1988-09-18 |
| 1989 | 1989-04-22 | 1989-10-02 |
| 1990 | 1990-06-05 | 1990-10-06 |
| 1991 | 1991-04-07 | 1991-10-17 |
| 1992 | 1992-05-08 | 1992-10-04 |
| 1993 | 1993-06-21 | 1993-10-07 |
| 1994 | 1994-04-18 | 1994-09-30 |
| 1995 | 1995-06-07 | 1995-10-13 |
| 1996 | 1996-05-17 | 1996-10-13 |
| 1997 | 1997-05-17 | 1997-10-03 |
| 1998 | 1998-05-18 | 1998-09-29 |
| 1999 | 1999-06-05 | 1999-11-09 |
| 2000 | 2000-05-05 | 2000-09-30 |
| 2001 | 2001-05-13 | 2001-10-03 |
| 2002 | 2002-05-29 | 2002-09-09 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 37 | 80 | 2000 | 68 |
| 35 C (95 F): Days | 37 | 27 | 2002 | 27 |
| 40 C (104 F): Days | 9 | 3 | 1954 | 1 |
| 90 F (32.2 C): Days | 37 | 54 | 2000 | 52 |
| 100 F (37.8 C): Days | 32 | 12 | 2002 | 12 |
| 0 C (32 F): Ice days (max | 37 | 65 | 1975 | 38 |
| 0 C (32 F): Frost days (min | 35 | 193 | 1970 | 186 |
| -10 C (14 F): Days with min | 35 | 77 | 1985 | 55 |
| -20 C (-4 F): Days with min | 35 | 30 | 1985 | 6 |
| -30 C (-22 F): Days with min | 14 | 7 | 1989 | 4 |
| 20 C (68 F): Tropical nights (min | 19 | 5 | 2001 | 4 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 40 | 29 | 1951 | 9 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 39 | 12 | 1986 | 2 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 19 | 3 | 1949 | 3 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 4 | 1 | 1968 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 35 | 10 | 1987 | 4 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 12 | 3 | 1995 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1954.
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).