Back Bay Wr Threshold Days by Year
17 fixed thresholds counted per year at Back Bay Wr (USC00440385): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Back Bay Wr Thresholds
- Back Bay Wr: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 1962 with 46.
- Back Bay Wr: days with 25 mm (0.98 in) or more of precipitation in 35 years, most in 1982 with 22.
- Back Bay Wr: days with 50 mm (1.97 in) or more of precipitation in 30 years, most in 1957 with 6.
- Back Bay Wr: days with a maximum temperature at or above 30 C (86 F) in 28 years, most in 1977 with 79.
- 17 fixed thresholds have at least one qualifying day at Back Bay Wr.
Days at or above 30 C (86 F)
28 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1954 | 50 | 45.5 |
| 1955 | 36 | 45.5 |
| 1956 | 46 | 45.5 |
| 1957 | 60 | 45.5 |
| 1958 | 41 | 45.5 |
| 1959 | 40 | 45.5 |
| 1960 | 41 | 37 |
| 1962 | 25 | 37 |
| 1963 | 43 | 37 |
| 1964 | 41 | 37 |
| 1966 | 35 | 37 |
| 1967 | 25 | 37 |
| 1968 | 44 | 37 |
| 1969 | 42 | 37 |
| 1970 | 42 | 48 |
| 1972 | 36 | 48 |
| 1973 | 51 | 48 |
| 1974 | 41 | 48 |
| 1977 | 79 | 48 |
| 1978 | 51 | 48 |
| 1979 | 36 | 48 |
| 1980 | 58 | 55.6 |
| 1981 | 61 | 55.6 |
| 1982 | 29 | 55.6 |
| 1983 | 53 | 55.6 |
| 1984 | 60 | 55.6 |
| 1985 | 60 | 55.6 |
| 1986 | 68 | 55.6 |
| Year | First date | Last date |
|---|---|---|
| 1954 | 1954-05-03 | 1954-10-11 |
| 1955 | 1955-05-29 | 1955-08-23 |
| 1956 | 1956-05-12 | 1956-09-17 |
| 1957 | 1957-04-21 | 1957-09-23 |
| 1958 | 1958-06-09 | 1958-09-17 |
| 1959 | 1959-05-22 | 1959-08-30 |
| 1960 | 1960-04-23 | 1960-09-20 |
| 1962 | 1962-05-24 | 1962-09-12 |
| 1963 | 1963-04-03 | 1963-08-30 |
| 1964 | 1964-05-08 | 1964-09-05 |
| 1966 | 1966-06-09 | 1966-09-05 |
| 1967 | 1967-04-03 | 1967-08-28 |
| 1968 | 1968-05-24 | 1968-08-26 |
| 1969 | 1969-05-08 | 1969-09-08 |
| 1970 | 1970-05-09 | 1970-09-27 |
| 1972 | 1972-06-04 | 1972-09-30 |
| 1973 | 1973-05-28 | 1973-10-05 |
| 1974 | 1974-04-29 | 1974-09-29 |
| 1977 | 1977-04-12 | 1977-10-03 |
| 1978 | 1978-06-03 | 1978-09-23 |
| 1979 | 1979-06-03 | 1979-09-14 |
| 1980 | 1980-05-13 | 1980-09-24 |
| 1981 | 1981-04-29 | 1981-09-16 |
| 1982 | 1982-06-01 | 1982-09-19 |
| 1983 | 1983-06-14 | 1983-09-20 |
| 1984 | 1984-05-19 | 1984-10-21 |
| 1985 | 1985-04-20 | 1985-10-16 |
| 1986 | 1986-05-07 | 1986-10-06 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 28 | 79 | 1977 | 68 |
| 35 C (95 F): Days | 17 | 24 | 1977 | 7 |
| 90 F (32.2 C): Days | 28 | 48 | 1977 | 28 |
| 100 F (37.8 C): Days | 2 | 2 | 1980 | 2 |
| 0 C (32 F): Ice days (max | 23 | 8 | 1970 | 4 |
| 0 C (32 F): Frost days (min | 27 | 67 | 1978 | 36 |
| -10 C (14 F): Days with min | 14 | 7 | 1985 | 7 |
| -20 C (-4 F): Days with min | 1 | 1 | 1985 | 1 |
| 20 C (68 F): Tropical nights (min | 27 | 106 | 1959 | 92 |
| 25 C (77 F): Days with min | 21 | 10 | 1968 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 35 | 46 | 1962 | 26 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 35 | 22 | 1982 | 6 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 30 | 6 | 1957 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 7 | 1 | 1957 | 1 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 1 | 1 | 1964 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 9 | 2 | 1980 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 1 | 0 | n/a | 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2025-12-31).