Blackstone FAA AP Threshold Days by Year (USW00013726)
16 fixed thresholds counted per year at Blackstone FAA AP (USW00013726): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Blackstone FAA AP Thresholds
- Blackstone FAA AP: days with a maximum temperature at or above 30 C (86 F) in 24 years, most in 1954 with 91.
- Blackstone FAA AP: days with a maximum temperature at or above 90 F (32.2 C) in 24 years, most in 1953 with 53.
- Blackstone FAA AP: nights with a minimum temperature at or below 0 C (32 F) in 24 years, most in 1960 with 100.
- Blackstone FAA AP: nights with a minimum temperature at or above 20 C (68 F) in 24 years, most in 1959 with 70.
- 16 fixed thresholds have at least one qualifying day at Blackstone FAA AP.
Days at or above 30 C (86 F)
24 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1949 | 67 | 67 |
| 1950 | 59 | 71.1 |
| 1951 | 70 | 71.1 |
| 1952 | 79 | 71.1 |
| 1953 | 79 | 71.1 |
| 1954 | 91 | 71.1 |
| 1955 | 60 | 71.1 |
| 1956 | 69 | 71.1 |
| 1957 | 77 | 71.1 |
| 1958 | 58 | 71.1 |
| 1959 | 69 | 71.1 |
| 1960 | 63 | 61.7 |
| 1961 | 67 | 61.7 |
| 1962 | 55 | 61.7 |
| 1963 | 73 | 61.7 |
| 1964 | 52 | 61.7 |
| 1965 | 69 | 61.7 |
| 1966 | 70 | 61.7 |
| 1967 | 44 | 61.7 |
| 1968 | 61 | 61.7 |
| 1969 | 63 | 61.7 |
| 1970 | 84 | 71 |
| 1971 | 58 | 71 |
| 2025 | 61 | 61 |
| Year | First date | Last date |
|---|---|---|
| 1949 | 1949-04-15 | 1949-09-19 |
| 1950 | 1950-04-24 | 1950-11-01 |
| 1951 | 1951-04-26 | 1951-10-07 |
| 1952 | 1952-04-20 | 1952-10-02 |
| 1953 | 1953-05-11 | 1953-09-29 |
| 1954 | 1954-04-26 | 1954-10-13 |
| 1955 | 1955-04-19 | 1955-09-20 |
| 1956 | 1956-05-12 | 1956-09-23 |
| 1957 | 1957-04-21 | 1957-09-22 |
| 1958 | 1958-04-19 | 1958-10-10 |
| 1959 | 1959-04-08 | 1959-10-05 |
| 1960 | 1960-04-14 | 1960-09-10 |
| 1961 | 1961-04-24 | 1961-09-25 |
| 1962 | 1962-04-26 | 1962-10-12 |
| 1963 | 1963-04-02 | 1963-10-08 |
| 1964 | 1964-04-18 | 1964-09-11 |
| 1965 | 1965-05-02 | 1965-09-23 |
| 1966 | 1966-04-24 | 1966-09-05 |
| 1967 | 1967-04-02 | 1967-10-05 |
| 1968 | 1968-03-21 | 1968-10-03 |
| 1969 | 1969-05-04 | 1969-09-16 |
| 1970 | 1970-04-21 | 1970-10-03 |
| 1971 | 1971-04-13 | 1971-09-17 |
| 2025 | 2025-04-05 | 2025-09-24 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 24 | 91 | 1954 | 61 |
| 35 C (95 F): Days | 20 | 23 | 1954 | 4 |
| 40 C (104 F): Days | 1 | 1 | 1954 | 1 |
| 90 F (32.2 C): Days | 24 | 53 | 1953 | 22 |
| 100 F (37.8 C): Days | 4 | 6 | 1952 | 2 |
| 0 C (32 F): Ice days (max | 23 | 13 | 1963 | 3 |
| 0 C (32 F): Frost days (min | 24 | 100 | 1960 | 60 |
| -10 C (14 F): Days with min | 22 | 15 | 1958 | 3 |
| 20 C (68 F): Tropical nights (min | 24 | 70 | 1959 | 61 |
| 25 C (77 F): Days with min | 1 | 1 | 1954 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 23 | 45 | 1957 | 37 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 23 | 17 | 1971 | 17 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 19 | 6 | 1955 | 5 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 2 | 1 | 1962 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 11 | 6 | 1962 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 6 | 1 | 1960 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.
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).