Ailey Threshold Days by Year (USC00090090)
14 fixed thresholds counted per year at Ailey (USC00090090): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Ailey Thresholds
- Ailey: days with 10 mm (0.39 in) or more of precipitation in 24 years, most in 1966 with 47.
- Ailey: days with 25 mm (0.98 in) or more of precipitation in 24 years, most in 1966 with 19.
- Ailey: days with 50 mm (1.97 in) or more of precipitation in 24 years, most in 1953 with 7.
- Ailey: nights with a minimum temperature at or below 0 C (32 F) in 16 years, most in 1970 with 55.
- 14 fixed thresholds have at least one qualifying day at Ailey.
Days at or above 30 C (86 F)
15 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1948 | 123 | 120.5 |
| 1949 | 118 | 120.5 |
| 1953 | 128 | 132 |
| 1954 | 140 | 132 |
| 1955 | 132 | 132 |
| 1956 | 128 | 132 |
| 1960 | 135 | 113 |
| 1961 | 116 | 113 |
| 1963 | 117 | 113 |
| 1966 | 93 | 113 |
| 1967 | 104 | 113 |
| 1970 | 122 | 113 |
| 1976 | 104 | 113 |
| 1987 | 131 | 127.5 |
| 1988 | 124 | 127.5 |
| Year | First date | Last date |
|---|---|---|
| 1948 | 1948-03-21 | 1948-11-04 |
| 1949 | 1949-03-25 | 1949-10-26 |
| 1953 | 1953-04-10 | 1953-10-22 |
| 1954 | 1954-03-26 | 1954-10-28 |
| 1955 | 1955-03-13 | 1955-10-14 |
| 1956 | 1956-03-08 | 1956-10-08 |
| 1960 | 1960-04-21 | 1960-10-19 |
| 1961 | 1961-03-05 | 1961-11-05 |
| 1963 | 1963-03-22 | 1963-10-29 |
| 1966 | 1966-04-01 | 1966-10-19 |
| 1967 | 1967-03-13 | 1967-10-17 |
| 1970 | 1970-04-20 | 1970-10-16 |
| 1976 | 1976-03-05 | 1976-10-06 |
| 1987 | 1987-04-13 | 1987-09-29 |
| 1988 | 1988-04-05 | 1988-10-02 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 15 | 140 | 1954 | 124 |
| 35 C (95 F): Days | 15 | 76 | 1954 | 25 |
| 40 C (104 F): Days | 1 | 2 | 1954 | 2 |
| 90 F (32.2 C): Days | 15 | 117 | 1954 | 85 |
| 100 F (37.8 C): Days | 7 | 25 | 1954 | 3 |
| 0 C (32 F): Ice days (max | 1 | 1 | 1970 | 1 |
| 0 C (32 F): Frost days (min | 16 | 55 | 1970 | 44 |
| -10 C (14 F): Days with min | 6 | 4 | 1970 | 2 |
| 20 C (68 F): Tropical nights (min | 16 | 93 | 1963 | 85 |
| 25 C (77 F): Days with min | 2 | 0 | n/a | 3 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 24 | 47 | 1966 | 35 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 24 | 19 | 1966 | 14 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 24 | 7 | 1953 | 4 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 2 | 1 | 1949 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1948.
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).