Richardson Gr Sp Threshold Days by Year
13 fixed thresholds counted per year at Richardson Gr Sp (USC00047404): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Richardson Gr Sp Thresholds
- Richardson Gr Sp: days with 10 mm (0.39 in) or more of precipitation in 44 years, most in 1983 with 83.
- Richardson Gr Sp: days with 25 mm (0.98 in) or more of precipitation in 44 years, most in 1983 with 46.
- Richardson Gr Sp: days with 50 mm (1.97 in) or more of precipitation in 44 years, most in 1983 with 19.
- Richardson Gr Sp: days with a maximum temperature at or above 30 C (86 F) in 43 years, most in 1967 with 86.
- 13 fixed thresholds have at least one qualifying day at Richardson Gr Sp.
Days at or above 30 C (86 F)
43 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1962 | 66 | 62.1 |
| 1963 | 50 | 62.1 |
| 1964 | 58 | 62.1 |
| 1965 | 60 | 62.1 |
| 1966 | 60 | 62.1 |
| 1967 | 86 | 62.1 |
| 1968 | 62 | 62.1 |
| 1969 | 55 | 62.1 |
| 1970 | 78 | 61.1 |
| 1971 | 59 | 61.1 |
| 1972 | 57 | 61.1 |
| 1973 | 71 | 61.1 |
| 1974 | 66 | 61.1 |
| 1975 | 61 | 61.1 |
| 1976 | 47 | 61.1 |
| 1977 | 59 | 61.1 |
| 1978 | 51 | 61.1 |
| 1979 | 62 | 61.1 |
| 1980 | 54 | 53.2 |
| 1981 | 54 | 53.2 |
| 1982 | 53 | 53.2 |
| 1983 | 40 | 53.2 |
| 1984 | 62 | 53.2 |
| 1985 | 63 | 53.2 |
| 1986 | 53 | 53.2 |
| 1987 | 56 | 53.2 |
| 1988 | 60 | 53.2 |
| 1989 | 37 | 53.2 |
| 1990 | 47 | 48.5 |
| 1991 | 60 | 48.5 |
| 1992 | 43 | 48.5 |
| 1993 | 39 | 48.5 |
| 1994 | 51 | 48.5 |
| 1995 | 40 | 48.5 |
| 1996 | 62 | 48.5 |
| 1997 | 42 | 48.5 |
| 1998 | 48 | 48.5 |
| 1999 | 53 | 48.5 |
| 2000 | 47 | 56.4 |
| 2001 | 60 | 56.4 |
| 2002 | 59 | 56.4 |
| 2003 | 58 | 56.4 |
| 2009 | 58 | 56.4 |
| Year | First date | Last date |
|---|---|---|
| 1962 | 1962-04-12 | 1962-09-25 |
| 1963 | 1963-05-18 | 1963-10-02 |
| 1964 | 1964-06-23 | 1964-10-06 |
| 1965 | 1965-04-27 | 1965-10-08 |
| 1966 | 1966-05-03 | 1966-09-30 |
| 1967 | 1967-05-08 | 1967-09-29 |
| 1968 | 1968-04-28 | 1968-09-29 |
| 1969 | 1969-05-07 | 1969-09-29 |
| 1970 | 1970-05-02 | 1970-10-03 |
| 1971 | 1971-05-11 | 1971-10-09 |
| 1972 | 1972-05-13 | 1972-09-16 |
| 1973 | 1973-05-12 | 1973-09-30 |
| 1974 | 1974-06-01 | 1974-10-19 |
| 1975 | 1975-05-13 | 1975-10-01 |
| 1976 | 1976-05-08 | 1976-10-14 |
| 1977 | 1977-05-31 | 1977-09-12 |
| 1978 | 1978-05-09 | 1978-10-14 |
| 1979 | 1979-05-26 | 1979-10-05 |
| 1980 | 1980-06-28 | 1980-10-10 |
| 1981 | 1981-04-30 | 1981-09-19 |
| 1982 | 1982-05-07 | 1982-10-12 |
| 1983 | 1983-05-20 | 1983-09-20 |
| 1984 | 1984-05-28 | 1984-09-29 |
| 1985 | 1985-04-15 | 1985-10-05 |
| 1986 | 1986-04-21 | 1986-09-11 |
| 1987 | 1987-04-27 | 1987-10-07 |
| 1988 | 1988-04-12 | 1988-10-01 |
| 1989 | 1989-04-09 | 1989-09-24 |
| 1990 | 1990-05-04 | 1990-10-01 |
| 1991 | 1991-06-09 | 1991-10-21 |
| 1992 | 1992-05-04 | 1992-09-29 |
| 1993 | 1993-06-18 | 1993-10-02 |
| 1994 | 1994-04-16 | 1994-10-06 |
| 1995 | 1995-05-30 | 1995-09-22 |
| 1996 | 1996-05-12 | 1996-10-10 |
| 1997 | 1997-05-17 | 1997-09-30 |
| 1998 | 1998-04-29 | 1998-09-16 |
| 1999 | 1999-05-23 | 1999-10-02 |
| 2000 | 2000-05-21 | 2000-09-21 |
| 2001 | 2001-05-08 | 2001-10-06 |
| 2002 | 2002-06-12 | 2002-10-08 |
| 2003 | 2003-05-24 | 2003-10-29 |
| 2009 | 2009-04-21 | 2009-09-28 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 43 | 86 | 1967 | 58 |
| 35 C (95 F): Days | 43 | 42 | 1967 | 16 |
| 40 C (104 F): Days | 22 | 7 | 1967 | 1 |
| 90 F (32.2 C): Days | 43 | 68 | 1967 | 29 |
| 100 F (37.8 C): Days | 36 | 18 | 1967 | 2 |
| 110 F (43.3 C): Days | 3 | 3 | 1978 | 1 |
| 0 C (32 F): Ice days (max | 4 | 4 | 1990 | 2 |
| 0 C (32 F): Frost days (min | 40 | 61 | 1976 | 19 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 44 | 83 | 1983 | 39 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 44 | 46 | 1983 | 21 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 44 | 19 | 1983 | 5 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 35 | 5 | 1995 | 2 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 2 | 1 | 1964 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1962.
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).