Block Island State AP Weather Records (USW00094793)
Record envelope, standing records and threshold days for Block Island State AP (USW00094793), Rhode Island, United States, with 100 years of record.
Key Facts for Block Island State AP
- Block Island State AP (USW00094793) is a weather station in Rhode Island, United States at 41.17 latitude and -71.58 longitude, 34 m (110 ft) above sea level.
- The station reports from 1927 to 2026, 100 years of record.
- 1,464 records set at Block Island State AP still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Block Island State AP tied a daily record high minimum temperature of 17.8 C (64.0 F) on 2 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Rhode Island, United States, 41.17 latitude, -71.58 longitude.
- Elevation: 34 m (110 ft).
- Period of record: 1927 to 2026, 100 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
18 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 16.7 C (62.1 F) | -21.7 C (-7.1 F) | 9.4 C (48.9 F) | -14.4 C (6.1 F) |
| Feb | 16.7 C (62.1 F) | -18.9 C (-2.0 F) | 6.1 C (43.0 F) | -16.1 C (3.0 F) |
| Mar | 23.3 C (73.9 F) | -13.9 C (7.0 F) | 15.6 C (60.1 F) | -8.9 C (16.0 F) |
| Apr | 28.9 C (84.0 F) | -7.8 C (18.0 F) | 23.9 C (75.0 F) | -2.2 C (28.0 F) |
| May | 29.4 C (84.9 F) | 1.1 C (34.0 F) | 23.3 C (73.9 F) | 5.6 C (42.1 F) |
| Jun | 32.8 C (91.0 F) | 5.0 C (41.0 F) | 28.9 C (84.0 F) | 8.3 C (46.9 F) |
| Jul | 33.3 C (91.9 F) | 10.6 C (51.1 F) | 31.1 C (88.0 F) | 14.4 C (57.9 F) |
| Aug | 35.0 C (95.0 F) | 7.2 C (45.0 F) | 30.0 C (86.0 F) | 16.1 C (61.0 F) |
| Sep | 30.6 C (87.1 F) | 3.9 C (39.0 F) | 26.1 C (79.0 F) | 12.2 C (54.0 F) |
| Oct | 26.7 C (80.1 F) | -2.2 C (28.0 F) | 22.2 C (72.0 F) | 5.0 C (41.0 F) |
| Nov | 22.2 C (72.0 F) | -8.9 C (16.0 F) | n/a | n/a |
| Dec | 17.8 C (64.0 F) | -20.0 C (-4.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1948 | 16 |
| 1949 | 36 |
| 1950 | 37 |
| 1951 | 21 |
| 1952 | 20 |
| 1953 | 29 |
| 1954 | 25 |
| 1955 | 30 |
| 1956 | 46 |
| 1957 | 29 |
| 1958 | 22 |
| 1959 | 37 |
| 1960 | 22 |
| 1961 | 32 |
| 1962 | 34 |
| 1963 | 34 |
| 1964 | 27 |
| 1965 | 38 |
| 1966 | 16 |
| 1967 | 47 |
| 1968 | 36 |
| 1969 | 18 |
| 1970 | 28 |
| 1971 | 38 |
| 1972 | 39 |
| 1973 | 19 |
| 1974 | 34 |
| 1975 | 32 |
| 1976 | 87 |
| 1977 | 29 |
| 1978 | 21 |
| 1979 | 56 |
| 1980 | 19 |
| 1981 | 18 |
| 1982 | 22 |
| 1983 | 22 |
| 1984 | 34 |
| 1985 | 18 |
| 1986 | 28 |
| 1987 | 25 |
| 1988 | 17 |
| 1989 | 31 |
| 1990 | 39 |
| 1991 | 32 |
| 1992 | 35 |
| 1993 | 22 |
| 1994 | 12 |
| 1995 | 12 |
| 2024 | 9 |
| 2025 | 15 |
| 2026 | 19 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1978-01-20 | Record daily snowfall | Record daily snowfall 53.8 cm (21.2 in) |
| 1979-08-02 | Record high minimum temperature | Record high minimum temperature 24.4 C (75.9 F) |
| 1994-01-16 | Record low minimum temperature | Record low minimum temperature -21.7 C (-7.1 F) |
| 1994-02-12 | Record snow depth | Record snow depth 35.6 cm (14.0 in) |
Wettest Day of Each Month
Sep: 166.4 mm (6.6 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 86.1 mm (3.4 in) | 6 January 1962 |
| Feb | 72.6 mm (2.9 in) | 19 February 1972 |
| Mar | 68.6 mm (2.7 in) | 14 March 1993 |
| Apr | 68.3 mm (2.7 in) | 10 April 1983 |
| May | 93.2 mm (3.7 in) | 31 May 1984 |
| Jun | 109.2 mm (4.3 in) | 20 June 1981 |
| Jul | 86.1 mm (3.4 in) | 4 July 1978 |
| Aug | 108.2 mm (4.3 in) | 14 August 1953 |
| Sep | 166.4 mm (6.6 in) | 21 September 1961 |
| Oct | 165.4 mm (6.5 in) | 16 October 1955 |
| Nov | 86.9 mm (3.4 in) | 3 November 1969 |
| Dec | 110.0 mm (4.3 in) | 28 December 1967 |
Period of Record Coverage
1948 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1948 | 214 | 58% | No |
| 1949 | 364 | 100% | Yes |
| 1950 | 363 | 99% | Yes |
| 1951 | 363 | 99% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 363 | 99% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 364 | 100% | Yes |
| 1956 | 365 | 100% | Yes |
| 1957 | 364 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 364 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 364 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 361 | 99% | Yes |
| 1976 | 365 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 364 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 307 | 84% | No |
| 1990 | 365 | 100% | Yes |
| 1991 | 363 | 99% | Yes |
| 1992 | 359 | 98% | Yes |
| 1993 | 361 | 99% | Yes |
| 1994 | 292 | 80% | No |
| 1995 | 229 | 63% | No |
| 2024 | 129 | 35% | No |
| 2025 | 338 | 93% | Yes |
| 2026 | 278 | 76% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 2 October 2026 | Block Island State AP, US | daily high min (Tie, Provisional) | 17.8 C (64.0 F) | tie | 72 years | 7 of 100 (Routine) |
| 18 September 2026 | Block Island State AP, US | daily high max (Tie, Provisional) | 25.6 C (78.1 F) | tie | 57 years | 6 of 100 (Routine) |
| 10 September 2026 | Block Island State AP, US | daily high min (Provisional) | 20.6 C (69.1 F) | 0.6 C (1.1 F) | 67 years | 28 of 100 (Routine) |
| 19 August 2026 | Block Island State AP, US | daily high min (Provisional) | 21.7 C (71.1 F) | 0.6 C (1.1 F) | 69 years | 29 of 100 (Routine) |
| 9 August 2026 | Block Island State AP, US | daily high max (Tie) | 29.4 C (84.9 F) | tie | 76 years | 7 of 100 (Routine) |
| 9 August 2026 | Block Island State AP, US | daily high min (Tie) | 21.7 C (71.1 F) | tie | 36 years | 4 of 100 (Routine) |
| 7 August 2026 | Block Island State AP, US | daily high max (Tie) | 30.0 C (86.0 F) | tie | 45 years | 5 of 100 (Routine) |
| 30 July 2026 | Block Island State AP, US | daily low max (Tie) | 21.1 C (70.0 F) | tie | 71 years | 7 of 100 (Routine) |
| 20 July 2026 | Block Island State AP, US | daily low min (Tie) | 14.4 C (57.9 F) | tie | 60 years | 6 of 100 (Routine) |
| 4 July 2026 | Block Island State AP, US | daily high max | 31.1 C (88.0 F) | 2.2 C (4.0 F) | 76 years | 38 of 100 (Notable) |
| 3 July 2026 | Block Island State AP, US | daily high min | 20.6 C (69.1 F) | 0.6 C (1.1 F) | 60 years | 27 of 100 (Routine) |
| 3 July 2026 | Block Island State AP, US | daily high max (Tie) | 31.1 C (88.0 F) | tie | 43 years | 4 of 100 (Routine) |
| 2 July 2026 | Block Island State AP, US | daily high min | 20.6 C (69.1 F) | 0.6 C (1.1 F) | 57 years | 26 of 100 (Routine) |
| 13 June 2026 | Block Island State AP, US | daily high min (Tie) | 17.8 C (64.0 F) | tie | 56 years | 6 of 100 (Routine) |
| 12 June 2026 | Block Island State AP, US | daily high min | 18.3 C (64.9 F) | 1.1 C (2.0 F) | 52 years | 26 of 100 (Routine) |
| 12 June 2026 | Block Island State AP, US | daily high max | 28.9 C (84.0 F) | 2.2 C (4.0 F) | 43 years | 25 of 100 (Routine) |
| 11 June 2026 | Block Island State AP, US | daily high max | 27.8 C (82.0 F) | 1.7 C (3.1 F) | 52 years | 27 of 100 (Routine) |
| 6 June 2026 | Block Island State AP, US | daily high min (Tie) | 15.6 C (60.1 F) | tie | 65 years | 6 of 100 (Routine) |
| 5 June 2026 | Block Island State AP, US | daily high max | 27.2 C (81.0 F) | 1.6 C (2.9 F) | 52 years | 26 of 100 (Routine) |
| 3 June 2026 | Block Island State AP, US | daily high max | 24.4 C (75.9 F) | 0.5 C (0.9 F) | 44 years | 21 of 100 (Routine) |
Climate Trend
44 complete years, 1949 to 1993| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1949 | 11.6 C | +1.29 C |
| 1950 | 10.2 C | -0.02 C |
| 1951 | 11.0 C | +0.71 C |
| 1952 | 11.0 C | +0.75 C |
| 1953 | 11.3 C | +1.06 C |
| 1954 | 10.4 C | +0.10 C |
| 1955 | 10.1 C | -0.20 C |
| 1956 | 9.7 C | -0.58 C |
| 1957 | 10.7 C | +0.45 C |
| 1958 | 9.4 C | -0.85 C |
| 1959 | 10.3 C | -0.01 C |
| 1960 | 10.1 C | -0.19 C |
| 1961 | 9.8 C | -0.51 C |
| 1962 | 9.3 C | -0.92 C |
| 1963 | 9.4 C | -0.88 C |
| 1964 | 9.7 C | -0.54 C |
| 1965 | 9.2 C | -1.07 C |
| 1966 | 9.6 C | -0.64 C |
| 1967 | 9.3 C | -1.01 C |
| 1968 | 9.7 C | -0.56 C |
| 1969 | 10.0 C | -0.24 C |
| 1970 | 9.8 C | -0.50 C |
| 1971 | 10.2 C | -0.02 C |
| 1972 | 9.9 C | -0.37 C |
| 1973 | 10.9 C | +0.67 C |
| 1974 | 10.4 C | +0.15 C |
| 1975 | 10.8 C | +0.52 C |
| 1976 | 10.3 C | +0.01 C |
| 1977 | 10.1 C | -0.17 C |
| 1978 | 9.5 C | -0.75 C |
| 1979 | 10.7 C | +0.41 C |
| 1980 | 10.3 C | +0.04 C |
| 1981 | 9.8 C | -0.51 C |
| 1982 | 10.0 C | -0.22 C |
| 1983 | 11.2 C | +0.92 C |
| 1984 | 11.2 C | +0.91 C |
| 1985 | 10.9 C | +0.66 C |
| 1986 | 10.5 C | +0.23 C |
| 1987 | 10.3 C | +0.07 C |
| 1988 | 10.2 C | -0.08 C |
| 1990 | 11.2 C | +0.91 C |
| 1991 | 11.2 C | +0.96 C |
| 1992 | 9.9 C | -0.37 C |
| 1993 | 10.5 C | +0.24 C |
The fitted trend in annual mean temperature here over 1949 to 1993 is 0.1 C (-0.1 to 0.2) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.2 to 0.4) per decade. The slope is a straight line fitted to 44 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.1 C (-0.1 to 0.2) per decade | 0.1 F (-0.2 to 0.4) per decade | 1949 to 1993 | 44 | Not clearly different from zero |
| Mean daily maximum | 0.1 C (-0.1 to 0.3) per decade | 0.2 F (-0.1 to 0.5) per decade | 1949 to 1993 | 44 | Not clearly different from zero |
| Mean daily minimum | 0.02 C (-0.12 to 0.16) per decade | 0.04 F (-0.21 to 0.29) per decade | 1949 to 1993 | 44 | Not clearly different from zero |
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1927 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 35.0 C (95.0 F) | 1948 | 30.6 C (87.1 F) | 51 |
| Coldest night (TNn) | -21.7 C (-7.1 F) | 1994 | -15.6 C (3.9 F) | 51 |
| Wettest day (Rx1day) | 166.4 mm (6.6 in) | 1961 | 66.6 mm (2.6 in) | 52 |
| Wettest five days (Rx5day) | 234.2 mm (9.2 in) | 1960 | 92.7 mm (3.6 in) | 51 |
| Longest dry spell (CDD) | 49 days | 1957 | 19 days | 52 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1927 | n/a |
| 1948 | 35.0 C (95.0 F) |
| 1949 | 31.7 C (89.1 F) |
| 1950 | 28.9 C (84.0 F) |
| 1951 | 30.6 C (87.1 F) |
| 1952 | 32.2 C (90.0 F) |
| 1953 | 30.6 C (87.1 F) |
| 1954 | 28.3 C (82.9 F) |
| 1955 | 32.8 C (91.0 F) |
| 1956 | 31.1 C (88.0 F) |
| 1957 | 31.1 C (88.0 F) |
| 1958 | 27.2 C (81.0 F) |
| 1959 | 31.1 C (88.0 F) |
| 1960 | 27.8 C (82.0 F) |
| 1961 | 31.1 C (88.0 F) |
| 1962 | 31.1 C (88.0 F) |
| 1963 | 31.1 C (88.0 F) |
| 1964 | 29.4 C (84.9 F) |
| 1965 | 27.8 C (82.0 F) |
| 1966 | 30.0 C (86.0 F) |
| 1967 | 27.8 C (82.0 F) |
| 1968 | 31.1 C (88.0 F) |
| 1969 | 29.4 C (84.9 F) |
| 1970 | 28.9 C (84.0 F) |
| 1971 | 30.6 C (87.1 F) |
| 1972 | 32.8 C (91.0 F) |
| 1973 | 32.8 C (91.0 F) |
| 1974 | 28.3 C (82.9 F) |
| 1975 | 32.8 C (91.0 F) |
| 1976 | 32.2 C (90.0 F) |
| 1977 | 31.1 C (88.0 F) |
| 1978 | 30.0 C (86.0 F) |
| 1979 | 30.0 C (86.0 F) |
| 1980 | 30.0 C (86.0 F) |
| 1981 | 28.9 C (84.0 F) |
| 1982 | 30.6 C (87.1 F) |
| 1983 | 31.1 C (88.0 F) |
| 1984 | 30.0 C (86.0 F) |
| 1985 | 30.0 C (86.0 F) |
| 1986 | 28.3 C (82.9 F) |
| 1987 | 31.1 C (88.0 F) |
| 1988 | 29.4 C (84.9 F) |
| 1989 | 30.6 C (87.1 F) |
| 1990 | 30.0 C (86.0 F) |
| 1991 | 31.1 C (88.0 F) |
| 1992 | 29.4 C (84.9 F) |
| 1993 | 33.3 C (91.9 F) |
| 1994 | 31.7 C (89.1 F) |
| 1995 | 29.4 C (84.9 F) |
| 2024 | 28.3 C (82.9 F) |
| 2025 | 32.8 C (91.0 F) |
| 2026 | 31.1 C (88.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1927 | n/a |
| 1948 | -11.7 C (10.9 F) |
| 1949 | -10.0 C (14.0 F) |
| 1950 | -16.1 C (3.0 F) |
| 1951 | -12.2 C (10.0 F) |
| 1952 | -12.8 C (9.0 F) |
| 1953 | -10.6 C (12.9 F) |
| 1954 | -15.6 C (3.9 F) |
| 1955 | -16.7 C (1.9 F) |
| 1956 | -11.1 C (12.0 F) |
| 1957 | -18.3 C (-0.9 F) |
| 1958 | -15.0 C (5.0 F) |
| 1959 | -13.9 C (7.0 F) |
| 1960 | -12.2 C (10.0 F) |
| 1961 | -18.9 C (-2.0 F) |
| 1962 | -20.0 C (-4.0 F) |
| 1963 | -17.2 C (1.0 F) |
| 1964 | -11.1 C (12.0 F) |
| 1965 | -15.6 C (3.9 F) |
| 1966 | -14.4 C (6.1 F) |
| 1967 | -16.7 C (1.9 F) |
| 1968 | -18.9 C (-2.0 F) |
| 1969 | -12.8 C (9.0 F) |
| 1970 | -16.1 C (3.0 F) |
| 1971 | -16.1 C (3.0 F) |
| 1972 | -14.4 C (6.1 F) |
| 1973 | -13.9 C (7.0 F) |
| 1974 | -14.4 C (6.1 F) |
| 1975 | -15.0 C (5.0 F) |
| 1976 | -17.8 C (0.0 F) |
| 1977 | -16.1 C (3.0 F) |
| 1978 | -14.4 C (6.1 F) |
| 1979 | -17.8 C (0.0 F) |
| 1980 | -17.8 C (0.0 F) |
| 1981 | -17.2 C (1.0 F) |
| 1982 | -16.7 C (1.9 F) |
| 1983 | -16.1 C (3.0 F) |
| 1984 | -16.1 C (3.0 F) |
| 1985 | -14.4 C (6.1 F) |
| 1986 | -14.4 C (6.1 F) |
| 1987 | -15.6 C (3.9 F) |
| 1988 | -15.6 C (3.9 F) |
| 1989 | -13.3 C (8.1 F) |
| 1990 | -15.0 C (5.0 F) |
| 1991 | -12.8 C (9.0 F) |
| 1992 | -17.8 C (0.0 F) |
| 1993 | -17.8 C (0.0 F) |
| 1994 | -21.7 C (-7.1 F) |
| 1995 | -13.3 C (8.1 F) |
| 2024 | -11.1 C (12.0 F) |
| 2025 | -11.1 C (12.0 F) |
| 2026 | -16.1 C (3.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1927 | 27.9 mm (1.1 in) |
| 1948 | 31.2 mm (1.2 in) |
| 1949 | 38.6 mm (1.5 in) |
| 1950 | 44.5 mm (1.8 in) |
| 1951 | 47.8 mm (1.9 in) |
| 1952 | 99.6 mm (3.9 in) |
| 1953 | 108.2 mm (4.3 in) |
| 1954 | 99.3 mm (3.9 in) |
| 1955 | 165.4 mm (6.5 in) |
| 1956 | 43.9 mm (1.7 in) |
| 1957 | 70.9 mm (2.8 in) |
| 1958 | 81.3 mm (3.2 in) |
| 1959 | 55.9 mm (2.2 in) |
| 1960 | 118.9 mm (4.7 in) |
| 1961 | 166.4 mm (6.6 in) |
| 1962 | 86.1 mm (3.4 in) |
| 1963 | 78.5 mm (3.1 in) |
| 1964 | 54.4 mm (2.1 in) |
| 1965 | 81.3 mm (3.2 in) |
| 1966 | 46.2 mm (1.8 in) |
| 1967 | 110.0 mm (4.3 in) |
| 1968 | 64.8 mm (2.6 in) |
| 1969 | 86.9 mm (3.4 in) |
| 1970 | 62.5 mm (2.5 in) |
| 1971 | 61.0 mm (2.4 in) |
| 1972 | 72.6 mm (2.9 in) |
| 1973 | 88.9 mm (3.5 in) |
| 1974 | 52.3 mm (2.1 in) |
| 1975 | 56.6 mm (2.2 in) |
| 1976 | 78.7 mm (3.1 in) |
| 1977 | 50.0 mm (2.0 in) |
| 1978 | 86.1 mm (3.4 in) |
| 1979 | 50.5 mm (2.0 in) |
| 1980 | 48.0 mm (1.9 in) |
| 1981 | 109.2 mm (4.3 in) |
| 1982 | 76.5 mm (3.0 in) |
| 1983 | 68.3 mm (2.7 in) |
| 1984 | 93.2 mm (3.7 in) |
| 1985 | 50.3 mm (2.0 in) |
| 1986 | 81.8 mm (3.2 in) |
| 1987 | 49.0 mm (1.9 in) |
| 1988 | 78.2 mm (3.1 in) |
| 1989 | 70.6 mm (2.8 in) |
| 1990 | 64.3 mm (2.5 in) |
| 1991 | 64.8 mm (2.6 in) |
| 1992 | 50.8 mm (2.0 in) |
| 1993 | 68.6 mm (2.7 in) |
| 1994 | 78.2 mm (3.1 in) |
| 1995 | 51.8 mm (2.0 in) |
| 2024 | 32.5 mm (1.3 in) |
| 2025 | 25.4 mm (1.0 in) |
| 2026 | 24.1 mm (0.9 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1927 | n/a |
| 1948 | 49.0 mm (1.9 in) |
| 1949 | 53.6 mm (2.1 in) |
| 1950 | 68.9 mm (2.7 in) |
| 1951 | 96.0 mm (3.8 in) |
| 1952 | 157.5 mm (6.2 in) |
| 1953 | 128.2 mm (5.0 in) |
| 1954 | 126.0 mm (5.0 in) |
| 1955 | 182.4 mm (7.2 in) |
| 1956 | 58.5 mm (2.3 in) |
| 1957 | 92.5 mm (3.6 in) |
| 1958 | 119.7 mm (4.7 in) |
| 1959 | 133.4 mm (5.3 in) |
| 1960 | 234.2 mm (9.2 in) |
| 1961 | 217.7 mm (8.6 in) |
| 1962 | 109.8 mm (4.3 in) |
| 1963 | 84.7 mm (3.3 in) |
| 1964 | 75.0 mm (3.0 in) |
| 1965 | 81.3 mm (3.2 in) |
| 1966 | 61.2 mm (2.4 in) |
| 1967 | 123.4 mm (4.9 in) |
| 1968 | 125.4 mm (4.9 in) |
| 1969 | 133.9 mm (5.3 in) |
| 1970 | 97.7 mm (3.8 in) |
| 1971 | 95.6 mm (3.8 in) |
| 1972 | 122.2 mm (4.8 in) |
| 1973 | 92.7 mm (3.6 in) |
| 1974 | 56.1 mm (2.2 in) |
| 1975 | 103.8 mm (4.1 in) |
| 1976 | 141.2 mm (5.6 in) |
| 1977 | 78.7 mm (3.1 in) |
| 1978 | 91.7 mm (3.6 in) |
| 1979 | 81.8 mm (3.2 in) |
| 1980 | 110.5 mm (4.4 in) |
| 1981 | 111.7 mm (4.4 in) |
| 1982 | 151.9 mm (6.0 in) |
| 1983 | 93.2 mm (3.7 in) |
| 1984 | 129.9 mm (5.1 in) |
| 1985 | 62.7 mm (2.5 in) |
| 1986 | 83.3 mm (3.3 in) |
| 1987 | 78.8 mm (3.1 in) |
| 1988 | 99.1 mm (3.9 in) |
| 1989 | 98.0 mm (3.9 in) |
| 1990 | 78.3 mm (3.1 in) |
| 1991 | 76.2 mm (3.0 in) |
| 1992 | 71.4 mm (2.8 in) |
| 1993 | 81.6 mm (3.2 in) |
| 1994 | 84.0 mm (3.3 in) |
| 1995 | 63.0 mm (2.5 in) |
| 2024 | 37.9 mm (1.5 in) |
| 2025 | 47.7 mm (1.9 in) |
| 2026 | 4.9 mm (0.19 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1927 | 2 days |
| 1948 | 23 days |
| 1949 | 46 days |
| 1950 | 25 days |
| 1951 | 16 days |
| 1952 | 18 days |
| 1953 | 19 days |
| 1954 | 20 days |
| 1955 | 18 days |
| 1956 | 15 days |
| 1957 | 49 days |
| 1958 | 18 days |
| 1959 | 19 days |
| 1960 | 19 days |
| 1961 | 19 days |
| 1962 | 15 days |
| 1963 | 28 days |
| 1964 | 28 days |
| 1965 | 22 days |
| 1966 | 17 days |
| 1967 | 21 days |
| 1968 | 18 days |
| 1969 | 18 days |
| 1970 | 16 days |
| 1971 | 18 days |
| 1972 | 18 days |
| 1973 | 22 days |
| 1974 | 16 days |
| 1975 | 27 days |
| 1976 | 23 days |
| 1977 | 20 days |
| 1978 | 24 days |
| 1979 | 16 days |
| 1980 | 16 days |
| 1981 | 15 days |
| 1982 | 20 days |
| 1983 | 23 days |
| 1984 | 19 days |
| 1985 | 21 days |
| 1986 | 19 days |
| 1987 | 19 days |
| 1988 | 26 days |
| 1989 | 15 days |
| 1990 | 27 days |
| 1991 | 15 days |
| 1992 | 17 days |
| 1993 | 16 days |
| 1994 | 26 days |
| 1995 | 21 days |
| 2024 | 7 days |
| 2025 | 22 days |
| 2026 | 32 days |
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
44 years with a frostAcross 44 years with a frost, the median last spring frost at Block Island State AP falls on 9 April and the median first autumn frost on 11 November, which leaves a median of 219 days between them.
Fitted over all years, the growing season changes by -1.0 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1963 to 1993) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 9 April | n/a | 9 April | n/a | -0.3 days per decade |
| First autumn frost | 11 November | n/a | 12 November | n/a | -1.3 days per decade |
| Growing days | 219 days | n/a | 219 days | n/a | -1.0 days per decade |
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
44 years, 1949 to 1993A day with at least 68.7 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 180.2 mm (7.1 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 68.7 mm (2.7 in) | |
| 5 years | 93.3 mm (3.7 in) | |
| 10 years | 111.4 mm (4.4 in) | |
| 25 years | 136.9 mm (5.4 in) | |
| 50 years | 157.7 mm (6.2 in) | Longer than the 44 years of record |
| 100 years | 180.2 mm (7.1 in) | Longer than the 44 years of record |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 44 years of values from 1949 to 1993.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 166.4 mm (6.6 in) in 1961; 165.4 mm (6.5 in) in 1955; 118.9 mm (4.7 in) in 1960.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-12).