First Connecticut Lake Weather Records (USC00272999)
Record envelope, standing records and threshold days for First Connecticut Lake (USC00272999), New Hampshire, United States, with 109 years of record.
Key Facts for First Connecticut Lake
- First Connecticut Lake (USC00272999) is a weather station in New Hampshire, United States at 45.09 latitude and -71.29 longitude, 503 m (1,650 ft) above sea level.
- The station reports from 1918 to 2026, 109 years of record.
- 1,464 records set at First Connecticut Lake still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- First Connecticut Lake tied a daily record high maximum temperature of 30.6 C (87.1 F) on 8 August 2026.
About the Station
- Location: New Hampshire, United States, 45.09 latitude, -71.29 longitude.
- Elevation: 503 m (1,650 ft).
- Period of record: 1918 to 2026, 109 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
4 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 15.6 C (60.1 F) | -42.2 C (-44.0 F) | 5.0 C (41.0 F) | -33.9 C (-29.0 F) |
| Feb | 17.8 C (64.0 F) | -42.8 C (-45.0 F) | 2.8 C (37.0 F) | -29.4 C (-20.9 F) |
| Mar | 25.0 C (77.0 F) | -37.8 C (-36.0 F) | 18.3 C (64.9 F) | -31.1 C (-24.0 F) |
| Apr | 28.3 C (82.9 F) | -27.2 C (-17.0 F) | 20.0 C (68.0 F) | -14.4 C (6.1 F) |
| May | 32.8 C (91.0 F) | -10.0 C (14.0 F) | 26.7 C (80.1 F) | -2.8 C (27.0 F) |
| Jun | 32.8 C (91.0 F) | -3.9 C (25.0 F) | 31.1 C (88.0 F) | 0.6 C (33.1 F) |
| Jul | 33.9 C (93.0 F) | -1.7 C (28.9 F) | 31.1 C (88.0 F) | 7.2 C (45.0 F) |
| Aug | 33.3 C (91.9 F) | -2.2 C (28.0 F) | 30.6 C (87.1 F) | 5.6 C (42.1 F) |
| Sep | 31.7 C (89.1 F) | -7.8 C (18.0 F) | 23.3 C (73.9 F) | -1.1 C (30.0 F) |
| Oct | 28.3 C (82.9 F) | -13.3 C (8.1 F) | 23.3 C (73.9 F) | -1.7 C (28.9 F) |
| Nov | 22.8 C (73.0 F) | -25.0 C (-13.0 F) | n/a | n/a |
| Dec | 17.2 C (63.0 F) | -42.2 C (-44.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1918 | 23 |
| 1919 | 19 |
| 1920 | 10 |
| 1921 | 21 |
| 1922 | 16 |
| 1923 | 16 |
| 1924 | 11 |
| 1930 | 14 |
| 1931 | 15 |
| 1932 | 19 |
| 1933 | 22 |
| 1934 | 15 |
| 1935 | 18 |
| 1936 | 28 |
| 1937 | 12 |
| 1938 | 23 |
| 1939 | 14 |
| 1940 | 20 |
| 1941 | 21 |
| 1942 | 8 |
| 1943 | 10 |
| 1944 | 17 |
| 1945 | 10 |
| 1946 | 15 |
| 1947 | 18 |
| 1948 | 13 |
| 1949 | 14 |
| 1950 | 19 |
| 1951 | 16 |
| 1952 | 7 |
| 1953 | 25 |
| 1954 | 15 |
| 1955 | 14 |
| 1956 | 12 |
| 1957 | 18 |
| 1958 | 15 |
| 1959 | 16 |
| 1960 | 13 |
| 1961 | 10 |
| 1962 | 14 |
| 1963 | 6 |
| 1964 | 14 |
| 1965 | 9 |
| 1966 | 15 |
| 1967 | 10 |
| 1968 | 18 |
| 1969 | 14 |
| 1970 | 12 |
| 1971 | 14 |
| 1972 | 9 |
| 1973 | 12 |
| 1974 | 12 |
| 1975 | 5 |
| 1976 | 22 |
| 1977 | 14 |
| 1978 | 18 |
| 1979 | 30 |
| 1980 | 11 |
| 1981 | 20 |
| 1982 | 13 |
| 1983 | 8 |
| 1984 | 16 |
| 1985 | 3 |
| 1986 | 16 |
| 1987 | 15 |
| 1988 | 9 |
| 1989 | 22 |
| 1990 | 14 |
| 1991 | 10 |
| 1992 | 18 |
| 1993 | 12 |
| 1994 | 14 |
| 1995 | 13 |
| 1996 | 11 |
| 1997 | 7 |
| 1998 | 7 |
| 1999 | 6 |
| 2000 | 10 |
| 2001 | 7 |
| 2002 | 9 |
| 2003 | 8 |
| 2004 | 9 |
| 2005 | 13 |
| 2006 | 8 |
| 2007 | 10 |
| 2008 | 11 |
| 2009 | 6 |
| 2010 | 14 |
| 2011 | 4 |
| 2012 | 18 |
| 2013 | 13 |
| 2014 | 20 |
| 2015 | 15 |
| 2016 | 7 |
| 2017 | 18 |
| 2018 | 23 |
| 2019 | 6 |
| 2020 | 19 |
| 2021 | 26 |
| 2022 | 21 |
| 2023 | 21 |
| 2024 | 11 |
| 2025 | 15 |
| 2026 | 7 |
All-Time Record Progression
6 new records| Date | Kind | Detail |
|---|---|---|
| 1968-01-09 | Record low maximum temperature | Record low maximum temperature -30.6 C (-23.1 F) |
| 1973-07-09 | Record high minimum temperature | Record high minimum temperature 21.1 C (70.0 F) |
| 1980-12-26 | Record low maximum temperature | Record low maximum temperature -31.1 C (-24.0 F) |
| 2003-12-07 | Record daily snowfall | Record daily snowfall 45.7 cm (18.0 in) |
| 2007-02-16 | Record daily snowfall | Record daily snowfall 61.0 cm (24.0 in) |
| 2024-07-11 | Record daily precipitation | Record daily precipitation 114.8 mm (4.5 in) |
Wettest Day of Each Month
Jul: 114.8 mm (4.5 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 52.1 mm (2.1 in) | 27 January 1986 |
| Feb | 40.6 mm (1.6 in) | 12 February 1955 |
| Mar | 48.3 mm (1.9 in) | 7 March 2011 |
| Apr | 66.0 mm (2.6 in) | 27 April 2011 |
| May | 48.8 mm (1.9 in) | 25 May 1930 |
| Jun | 112.3 mm (4.4 in) | 16 June 1943 |
| Jul | 114.8 mm (4.5 in) | 11 July 2024 |
| Aug | 111.5 mm (4.4 in) | 18 August 1922 |
| Sep | 91.4 mm (3.6 in) | 5 September 2012 |
| Oct | 67.1 mm (2.6 in) | 1 October 1946 |
| Nov | 51.1 mm (2.0 in) | 15 November 2009 |
| Dec | 47.5 mm (1.9 in) | 18 December 2000 |
Period of Record Coverage
1918 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1918 | 354 | 97% | Yes |
| 1919 | 342 | 94% | Yes |
| 1920 | 352 | 96% | Yes |
| 1921 | 353 | 97% | Yes |
| 1922 | 359 | 98% | Yes |
| 1923 | 360 | 99% | Yes |
| 1924 | 363 | 99% | Yes |
| 1930 | 353 | 97% | Yes |
| 1931 | 364 | 100% | Yes |
| 1932 | 365 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 362 | 99% | Yes |
| 1935 | 364 | 100% | Yes |
| 1936 | 356 | 97% | Yes |
| 1937 | 362 | 99% | Yes |
| 1938 | 363 | 99% | Yes |
| 1939 | 363 | 99% | Yes |
| 1940 | 365 | 100% | Yes |
| 1941 | 353 | 97% | Yes |
| 1942 | 338 | 93% | Yes |
| 1943 | 337 | 92% | Yes |
| 1944 | 337 | 92% | Yes |
| 1945 | 334 | 92% | Yes |
| 1946 | 334 | 92% | Yes |
| 1947 | 335 | 92% | Yes |
| 1948 | 348 | 95% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 363 | 99% | Yes |
| 1952 | 365 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 364 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 363 | 99% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 327 | 90% | No |
| 1962 | 361 | 99% | Yes |
| 1963 | 352 | 96% | Yes |
| 1964 | 356 | 97% | Yes |
| 1965 | 301 | 82% | No |
| 1966 | 302 | 83% | No |
| 1967 | 305 | 84% | No |
| 1968 | 303 | 83% | No |
| 1969 | 304 | 83% | No |
| 1970 | 311 | 85% | No |
| 1971 | 349 | 96% | Yes |
| 1972 | 364 | 99% | Yes |
| 1973 | 334 | 92% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 363 | 99% | Yes |
| 1984 | 365 | 100% | Yes |
| 1985 | 364 | 100% | Yes |
| 1986 | 362 | 99% | Yes |
| 1987 | 364 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 361 | 99% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 364 | 99% | Yes |
| 1993 | 363 | 99% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 363 | 99% | Yes |
| 1996 | 364 | 99% | Yes |
| 1997 | 364 | 100% | Yes |
| 1998 | 364 | 100% | Yes |
| 1999 | 363 | 99% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 362 | 99% | Yes |
| 2003 | 361 | 99% | Yes |
| 2004 | 364 | 99% | Yes |
| 2005 | 362 | 99% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 363 | 99% | Yes |
| 2008 | 365 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 365 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 365 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 362 | 99% | Yes |
| 2026 | 282 | 77% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 8 August 2026 | First Connecticut Lake, US | daily high max (Tie) | 30.6 C (87.1 F) | tie | 4 years | 2 of 100 (Routine) |
| 3 August 2026 | First Connecticut Lake, US | daily high min (Tie) | 18.9 C (66.0 F) | tie | 5 years | 2 of 100 (Routine) |
| 2 July 2026 | First Connecticut Lake, US | daily high max | 31.1 C (88.0 F) | 0.5 C (0.9 F) | 12 years | 14 of 100 (Routine) |
| 19 June 2026 | First Connecticut Lake, US | daily rain | 39.1 mm (1.5 in) | 4.8 mm (0.19 in) | 68 years | 34 of 100 (Routine) |
| 13 June 2026 | First Connecticut Lake, US | daily high max | 31.1 C (88.0 F) | 0.5 C (0.9 F) | 8 years | 13 of 100 (Routine) |
| 7 June 2026 | First Connecticut Lake, US | daily high min (Tie) | 15.0 C (59.0 F) | tie | 72 years | 7 of 100 (Routine) |
| 20 May 2026 | First Connecticut Lake, US | daily high min | 15.0 C (59.0 F) | 2.2 C (4.0 F) | 40 years | 26 of 100 (Routine) |
| 17 May 2026 | First Connecticut Lake, US | daily high min (Tie) | 13.3 C (55.9 F) | tie | 12 years | 3 of 100 (Routine) |
| 19 April 2026 | First Connecticut Lake, US | daily high min | 6.7 C (44.1 F) | 2.3 C (4.1 F) | 39 years | 25 of 100 (Routine) |
| 16 April 2026 | First Connecticut Lake, US | daily high min (Tie) | 3.3 C (37.9 F) | tie | 13 years | 3 of 100 (Routine) |
| 15 April 2026 | First Connecticut Lake, US | daily high min | 5.0 C (41.0 F) | 1.1 C (2.0 F) | 71 years | 33 of 100 (Routine) |
| 11 March 2026 | First Connecticut Lake, US | daily high max | 18.3 C (64.9 F) | 5.5 C (9.9 F) | 48 years | 32 of 100 (Routine) |
| 11 March 2026 | First Connecticut Lake, US | daily high min | 1.1 C (34.0 F) | 0.5 C (0.9 F) | 33 years | 20 of 100 (Routine) |
| 8 March 2026 | First Connecticut Lake, US | daily high min (Tie) | 0.0 C (32.0 F) | tie | 16 years | 3 of 100 (Routine) |
| 20 December 2025 | First Connecticut Lake, US | daily high max (Tie) | 10.6 C (51.1 F) | tie | 68 years | 7 of 100 (Routine) |
| 6 December 2025 | First Connecticut Lake, US | daily low min | -25.6 C (-14.1 F) | 1.7 C (3.1 F) | 34 years | 22 of 100 (Routine) |
| 20 October 2025 | First Connecticut Lake, US | daily high min | 10.6 C (51.1 F) | 0.6 C (1.1 F) | 88 years | 37 of 100 (Notable) |
| 8 October 2025 | First Connecticut Lake, US | daily high max | 25.6 C (78.1 F) | 0.6 C (1.1 F) | 62 years | 28 of 100 (Routine) |
| 7 October 2025 | First Connecticut Lake, US | daily high max | 27.8 C (82.0 F) | 3.4 C (6.1 F) | 79 years | 38 of 100 (Notable) |
| 6 October 2025 | First Connecticut Lake, US | daily high max | 27.8 C (82.0 F) | 0.6 C (1.1 F) | 2 years | 10 of 100 (Routine) |
Climate Trend
102 complete years, 1918 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1918 | 2.5 C | -0.74 C |
| 1919 | 4.1 C | +0.79 C |
| 1920 | 3.5 C | +0.25 C |
| 1921 | 4.8 C | +1.50 C |
| 1922 | 3.4 C | +0.12 C |
| 1923 | 2.3 C | -0.97 C |
| 1924 | 2.5 C | -0.78 C |
| 1930 | 4.2 C | +0.93 C |
| 1931 | 4.9 C | +1.64 C |
| 1932 | 4.1 C | +0.86 C |
| 1933 | 3.4 C | +0.17 C |
| 1934 | 3.0 C | -0.23 C |
| 1935 | 2.8 C | -0.47 C |
| 1936 | 3.4 C | +0.09 C |
| 1937 | 4.4 C | +1.13 C |
| 1938 | 3.8 C | +0.51 C |
| 1939 | 2.0 C | -1.23 C |
| 1940 | 1.7 C | -1.53 C |
| 1941 | 2.3 C | -0.98 C |
| 1942 | 3.1 C | -0.14 C |
| 1943 | 2.2 C | -1.02 C |
| 1944 | 3.0 C | -0.23 C |
| 1945 | 3.6 C | +0.29 C |
| 1946 | 3.7 C | +0.42 C |
| 1947 | 3.3 C | +0.04 C |
| 1948 | 3.2 C | -0.09 C |
| 1949 | 4.2 C | +0.96 C |
| 1950 | 3.4 C | +0.11 C |
| 1951 | 3.3 C | +0.04 C |
| 1952 | 4.0 C | +0.72 C |
| 1953 | 4.9 C | +1.61 C |
| 1954 | 3.0 C | -0.31 C |
| 1955 | 3.3 C | +0.05 C |
| 1956 | 2.3 C | -0.97 C |
| 1957 | 3.3 C | +0.08 C |
| 1958 | 2.1 C | -1.15 C |
| 1959 | 2.7 C | -0.54 C |
| 1960 | 2.7 C | -0.60 C |
| 1961 | 2.8 C | -0.51 C |
| 1962 | 2.2 C | -1.11 C |
| 1963 | 2.4 C | -0.83 C |
| 1964 | 2.9 C | -0.41 C |
| 1965 | 2.2 C | -1.11 C |
| 1966 | 3.0 C | -0.28 C |
| 1967 | 2.7 C | -0.52 C |
| 1968 | 2.5 C | -0.78 C |
| 1969 | 2.9 C | -0.34 C |
| 1970 | 2.4 C | -0.88 C |
| 1971 | 2.6 C | -0.67 C |
| 1972 | 1.9 C | -1.33 C |
| 1974 | 2.4 C | -0.90 C |
| 1975 | 3.1 C | -0.15 C |
| 1976 | 2.2 C | -1.11 C |
| 1977 | 2.8 C | -0.50 C |
| 1978 | 1.7 C | -1.61 C |
| 1979 | 3.5 C | +0.27 C |
| 1980 | 1.9 C | -1.34 C |
| 1981 | 3.4 C | +0.09 C |
| 1982 | 2.4 C | -0.83 C |
| 1983 | 3.6 C | +0.29 C |
| 1984 | 3.5 C | +0.27 C |
| 1985 | 2.3 C | -0.97 C |
| 1986 | 2.9 C | -0.34 C |
| 1987 | 3.1 C | -0.21 C |
| 1988 | 2.5 C | -0.74 C |
| 1989 | 1.6 C | -1.68 C |
| 1990 | 3.8 C | +0.49 C |
| 1991 | 3.3 C | +0.03 C |
| 1992 | 2.1 C | -1.21 C |
| 1993 | 2.5 C | -0.76 C |
| 1994 | 2.5 C | -0.74 C |
| 1995 | 3.2 C | -0.03 C |
| 1996 | 3.0 C | -0.31 C |
| 1997 | 2.0 C | -1.23 C |
| 1998 | 4.6 C | +1.38 C |
| 1999 | 4.2 C | +0.95 C |
| 2000 | 2.7 C | -0.52 C |
| 2001 | 3.5 C | +0.24 C |
| 2002 | 3.2 C | -0.03 C |
| 2003 | 2.5 C | -0.73 C |
| 2004 | 2.4 C | -0.86 C |
| 2005 | 3.5 C | +0.20 C |
| 2006 | 4.6 C | +1.30 C |
| 2007 | 2.5 C | -0.81 C |
| 2008 | 3.2 C | -0.06 C |
| 2009 | 3.2 C | -0.02 C |
| 2010 | 5.1 C | +1.79 C |
| 2011 | 4.6 C | +1.34 C |
| 2012 | 5.3 C | +2.07 C |
| 2013 | 4.1 C | +0.87 C |
| 2014 | 3.5 C | +0.21 C |
| 2015 | 3.3 C | +0.07 C |
| 2016 | 4.9 C | +1.62 C |
| 2017 | 4.4 C | +1.15 C |
| 2018 | 4.1 C | +0.79 C |
| 2019 | 3.2 C | -0.07 C |
| 2020 | 5.0 C | +1.76 C |
| 2021 | 5.2 C | +1.95 C |
| 2022 | 4.9 C | +1.61 C |
| 2023 | 5.6 C | +2.34 C |
| 2024 | 6.0 C | +2.70 C |
| 2025 | 4.2 C | +0.91 C |
The annual mean temperature here has risen by 0.08 C (0.02 to 0.14) per decade over 1918 to 2025. In Fahrenheit: 0.15 F (0.04 to 0.26) per decade. The slope is a straight line fitted to 102 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.08 C (0.02 to 0.14) per decade | 0.15 F (0.04 to 0.26) per decade | 1918 to 2025 | 102 | Rise |
| Mean daily maximum | 0.03 C (-0.03 to 0.08) per decade | 0.05 F (-0.05 to 0.15) per decade | 1918 to 2025 | 102 | Not clearly different from zero |
| Mean daily minimum | 0.1 C (0.1 to 0.2) per decade | 0.3 F (0.1 to 0.4) per decade | 1918 to 2025 | 102 | Rise |
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
1918 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 33.9 C (93.0 F) | 1921 | 30.6 C (87.1 F) | 104 |
| Coldest night (TNn) | -42.8 C (-45.0 F) | 1920 | -35.6 C (-32.1 F) | 104 |
| Wettest day (Rx1day) | 114.8 mm (4.5 in) | 2024 | 44.5 mm (1.8 in) | 104 |
| Wettest five days (Rx5day) | 143.7 mm (5.7 in) | 1922 | 76.9 mm (3.0 in) | 104 |
| Longest dry spell (CDD) | 19 days | 1980 | 12 days | 104 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1918 | 31.1 C (88.0 F) |
| 1919 | 32.8 C (91.0 F) |
| 1920 | 29.4 C (84.9 F) |
| 1921 | 33.9 C (93.0 F) |
| 1922 | 29.4 C (84.9 F) |
| 1923 | 31.1 C (88.0 F) |
| 1924 | 28.9 C (84.0 F) |
| 1930 | 30.6 C (87.1 F) |
| 1931 | 32.2 C (90.0 F) |
| 1932 | 30.6 C (87.1 F) |
| 1933 | 31.7 C (89.1 F) |
| 1934 | 29.4 C (84.9 F) |
| 1935 | 33.3 C (91.9 F) |
| 1936 | 28.9 C (84.0 F) |
| 1937 | 32.2 C (90.0 F) |
| 1938 | 30.6 C (87.1 F) |
| 1939 | 30.0 C (86.0 F) |
| 1940 | 29.4 C (84.9 F) |
| 1941 | 29.4 C (84.9 F) |
| 1942 | 30.6 C (87.1 F) |
| 1943 | 30.6 C (87.1 F) |
| 1944 | 33.3 C (91.9 F) |
| 1945 | 29.4 C (84.9 F) |
| 1946 | 32.2 C (90.0 F) |
| 1947 | 31.7 C (89.1 F) |
| 1948 | 30.6 C (87.1 F) |
| 1949 | 31.1 C (88.0 F) |
| 1950 | 28.3 C (82.9 F) |
| 1951 | 28.9 C (84.0 F) |
| 1952 | 33.3 C (91.9 F) |
| 1953 | 33.9 C (93.0 F) |
| 1954 | 31.1 C (88.0 F) |
| 1955 | 32.2 C (90.0 F) |
| 1956 | 30.6 C (87.1 F) |
| 1957 | 30.0 C (86.0 F) |
| 1958 | 29.4 C (84.9 F) |
| 1959 | 31.7 C (89.1 F) |
| 1960 | 30.0 C (86.0 F) |
| 1961 | 30.0 C (86.0 F) |
| 1962 | 30.0 C (86.0 F) |
| 1963 | 31.1 C (88.0 F) |
| 1964 | 30.0 C (86.0 F) |
| 1965 | 29.4 C (84.9 F) |
| 1966 | 29.4 C (84.9 F) |
| 1967 | 28.9 C (84.0 F) |
| 1968 | 30.6 C (87.1 F) |
| 1969 | 30.0 C (86.0 F) |
| 1970 | 30.0 C (86.0 F) |
| 1971 | 30.0 C (86.0 F) |
| 1972 | 30.0 C (86.0 F) |
| 1973 | 31.1 C (88.0 F) |
| 1974 | 28.3 C (82.9 F) |
| 1975 | 32.8 C (91.0 F) |
| 1976 | 28.9 C (84.0 F) |
| 1977 | 31.7 C (89.1 F) |
| 1978 | 30.0 C (86.0 F) |
| 1979 | 30.0 C (86.0 F) |
| 1980 | 28.9 C (84.0 F) |
| 1981 | 30.0 C (86.0 F) |
| 1982 | 30.0 C (86.0 F) |
| 1983 | 31.7 C (89.1 F) |
| 1984 | 30.0 C (86.0 F) |
| 1985 | 27.8 C (82.0 F) |
| 1986 | 28.3 C (82.9 F) |
| 1987 | 31.1 C (88.0 F) |
| 1988 | 31.7 C (89.1 F) |
| 1989 | 30.6 C (87.1 F) |
| 1990 | 28.9 C (84.0 F) |
| 1991 | 31.1 C (88.0 F) |
| 1992 | 28.3 C (82.9 F) |
| 1993 | 31.7 C (89.1 F) |
| 1994 | 32.2 C (90.0 F) |
| 1995 | 31.7 C (89.1 F) |
| 1996 | 28.3 C (82.9 F) |
| 1997 | 28.3 C (82.9 F) |
| 1998 | 28.9 C (84.0 F) |
| 1999 | 30.0 C (86.0 F) |
| 2000 | 28.3 C (82.9 F) |
| 2001 | 31.7 C (89.1 F) |
| 2002 | 31.7 C (89.1 F) |
| 2003 | 31.1 C (88.0 F) |
| 2004 | 28.9 C (84.0 F) |
| 2005 | 30.0 C (86.0 F) |
| 2006 | 30.0 C (86.0 F) |
| 2007 | 29.4 C (84.9 F) |
| 2008 | 32.2 C (90.0 F) |
| 2009 | 29.4 C (84.9 F) |
| 2010 | 32.8 C (91.0 F) |
| 2011 | 30.6 C (87.1 F) |
| 2012 | 31.1 C (88.0 F) |
| 2013 | 31.1 C (88.0 F) |
| 2014 | 30.6 C (87.1 F) |
| 2015 | 29.4 C (84.9 F) |
| 2016 | 30.6 C (87.1 F) |
| 2017 | 31.1 C (88.0 F) |
| 2018 | 32.2 C (90.0 F) |
| 2019 | 31.1 C (88.0 F) |
| 2020 | 32.8 C (91.0 F) |
| 2021 | 31.1 C (88.0 F) |
| 2022 | 30.6 C (87.1 F) |
| 2023 | 31.1 C (88.0 F) |
| 2024 | 32.2 C (90.0 F) |
| 2025 | 32.8 C (91.0 F) |
| 2026 | 31.1 C (88.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1918 | -42.2 C (-44.0 F) |
| 1919 | -32.2 C (-26.0 F) |
| 1920 | -42.8 C (-45.0 F) |
| 1921 | -36.1 C (-33.0 F) |
| 1922 | -40.0 C (-40.0 F) |
| 1923 | -38.9 C (-38.0 F) |
| 1924 | -36.7 C (-34.1 F) |
| 1930 | -37.2 C (-35.0 F) |
| 1931 | -33.3 C (-27.9 F) |
| 1932 | -31.7 C (-25.1 F) |
| 1933 | -42.2 C (-44.0 F) |
| 1934 | -40.0 C (-40.0 F) |
| 1935 | -42.2 C (-44.0 F) |
| 1936 | -32.8 C (-27.0 F) |
| 1937 | -33.3 C (-27.9 F) |
| 1938 | -37.8 C (-36.0 F) |
| 1939 | -36.1 C (-33.0 F) |
| 1940 | -35.6 C (-32.1 F) |
| 1941 | -34.4 C (-29.9 F) |
| 1942 | -37.2 C (-35.0 F) |
| 1943 | -40.6 C (-41.1 F) |
| 1944 | -34.4 C (-29.9 F) |
| 1945 | -35.0 C (-31.0 F) |
| 1946 | -35.6 C (-32.1 F) |
| 1947 | -30.0 C (-22.0 F) |
| 1948 | -40.6 C (-41.1 F) |
| 1949 | -31.1 C (-24.0 F) |
| 1950 | -35.0 C (-31.0 F) |
| 1951 | -37.8 C (-36.0 F) |
| 1952 | -34.4 C (-29.9 F) |
| 1953 | -30.6 C (-23.1 F) |
| 1954 | -33.9 C (-29.0 F) |
| 1955 | -35.6 C (-32.1 F) |
| 1956 | -32.2 C (-26.0 F) |
| 1957 | -40.6 C (-41.1 F) |
| 1958 | -34.4 C (-29.9 F) |
| 1959 | -35.6 C (-32.1 F) |
| 1960 | -36.1 C (-33.0 F) |
| 1961 | -38.3 C (-36.9 F) |
| 1962 | -36.1 C (-33.0 F) |
| 1963 | -36.1 C (-33.0 F) |
| 1964 | -33.3 C (-27.9 F) |
| 1965 | -34.4 C (-29.9 F) |
| 1966 | -33.3 C (-27.9 F) |
| 1967 | -33.3 C (-27.9 F) |
| 1968 | -36.7 C (-34.1 F) |
| 1969 | -32.8 C (-27.0 F) |
| 1970 | -35.6 C (-32.1 F) |
| 1971 | -40.0 C (-40.0 F) |
| 1972 | -36.7 C (-34.1 F) |
| 1973 | -40.0 C (-40.0 F) |
| 1974 | -39.4 C (-38.9 F) |
| 1975 | -36.1 C (-33.0 F) |
| 1976 | -37.2 C (-35.0 F) |
| 1977 | -33.3 C (-27.9 F) |
| 1978 | -36.1 C (-33.0 F) |
| 1979 | -37.2 C (-35.0 F) |
| 1980 | -35.6 C (-32.1 F) |
| 1981 | -37.2 C (-35.0 F) |
| 1982 | -35.0 C (-31.0 F) |
| 1983 | -37.8 C (-36.0 F) |
| 1984 | -36.7 C (-34.1 F) |
| 1985 | -37.2 C (-35.0 F) |
| 1986 | -33.3 C (-27.9 F) |
| 1987 | -36.7 C (-34.1 F) |
| 1988 | -35.0 C (-31.0 F) |
| 1989 | -37.8 C (-36.0 F) |
| 1990 | -28.9 C (-20.0 F) |
| 1991 | -33.9 C (-29.0 F) |
| 1992 | -33.3 C (-27.9 F) |
| 1993 | -38.9 C (-38.0 F) |
| 1994 | -42.2 C (-44.0 F) |
| 1995 | -37.8 C (-36.0 F) |
| 1996 | -35.0 C (-31.0 F) |
| 1997 | -40.6 C (-41.1 F) |
| 1998 | -32.8 C (-27.0 F) |
| 1999 | -40.0 C (-40.0 F) |
| 2000 | -36.1 C (-33.0 F) |
| 2001 | -30.6 C (-23.1 F) |
| 2002 | -27.8 C (-18.0 F) |
| 2003 | -35.0 C (-31.0 F) |
| 2004 | -37.8 C (-36.0 F) |
| 2005 | -34.4 C (-29.9 F) |
| 2006 | -30.0 C (-22.0 F) |
| 2007 | -34.4 C (-29.9 F) |
| 2008 | -36.7 C (-34.1 F) |
| 2009 | -37.8 C (-36.0 F) |
| 2010 | -27.2 C (-17.0 F) |
| 2011 | -33.3 C (-27.9 F) |
| 2012 | -30.0 C (-22.0 F) |
| 2013 | -33.9 C (-29.0 F) |
| 2014 | -35.6 C (-32.1 F) |
| 2015 | -37.2 C (-35.0 F) |
| 2016 | -31.7 C (-25.1 F) |
| 2017 | -29.4 C (-20.9 F) |
| 2018 | -33.3 C (-27.9 F) |
| 2019 | -30.6 C (-23.1 F) |
| 2020 | -37.2 C (-35.0 F) |
| 2021 | -30.6 C (-23.1 F) |
| 2022 | -33.9 C (-29.0 F) |
| 2023 | -34.4 C (-29.9 F) |
| 2024 | -26.7 C (-16.1 F) |
| 2025 | -34.4 C (-29.9 F) |
| 2026 | -33.9 C (-29.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1918 | 48.5 mm (1.9 in) |
| 1919 | 43.9 mm (1.7 in) |
| 1920 | 77.5 mm (3.1 in) |
| 1921 | 26.4 mm (1.0 in) |
| 1922 | 111.5 mm (4.4 in) |
| 1923 | 35.6 mm (1.4 in) |
| 1924 | 72.1 mm (2.8 in) |
| 1930 | 48.8 mm (1.9 in) |
| 1931 | 63.8 mm (2.5 in) |
| 1932 | 82.0 mm (3.2 in) |
| 1933 | 46.2 mm (1.8 in) |
| 1934 | 46.0 mm (1.8 in) |
| 1935 | 44.5 mm (1.8 in) |
| 1936 | 36.8 mm (1.4 in) |
| 1937 | 57.2 mm (2.3 in) |
| 1938 | 48.8 mm (1.9 in) |
| 1939 | 43.2 mm (1.7 in) |
| 1940 | 34.0 mm (1.3 in) |
| 1941 | 43.7 mm (1.7 in) |
| 1942 | 60.5 mm (2.4 in) |
| 1943 | 112.3 mm (4.4 in) |
| 1944 | 42.4 mm (1.7 in) |
| 1945 | 67.1 mm (2.6 in) |
| 1946 | 67.1 mm (2.6 in) |
| 1947 | 85.9 mm (3.4 in) |
| 1948 | 36.1 mm (1.4 in) |
| 1949 | 42.2 mm (1.7 in) |
| 1950 | 51.6 mm (2.0 in) |
| 1951 | 37.8 mm (1.5 in) |
| 1952 | 55.9 mm (2.2 in) |
| 1953 | 42.2 mm (1.7 in) |
| 1954 | 44.2 mm (1.7 in) |
| 1955 | 41.1 mm (1.6 in) |
| 1956 | 40.1 mm (1.6 in) |
| 1957 | 44.5 mm (1.8 in) |
| 1958 | 42.7 mm (1.7 in) |
| 1959 | 73.2 mm (2.9 in) |
| 1960 | 55.6 mm (2.2 in) |
| 1961 | 38.4 mm (1.5 in) |
| 1962 | 33.3 mm (1.3 in) |
| 1963 | 42.7 mm (1.7 in) |
| 1964 | 22.1 mm (0.9 in) |
| 1965 | 32.0 mm (1.3 in) |
| 1966 | 43.4 mm (1.7 in) |
| 1967 | 31.2 mm (1.2 in) |
| 1968 | 37.8 mm (1.5 in) |
| 1969 | 45.7 mm (1.8 in) |
| 1970 | 40.9 mm (1.6 in) |
| 1971 | 26.7 mm (1.1 in) |
| 1972 | 32.0 mm (1.3 in) |
| 1973 | 43.4 mm (1.7 in) |
| 1974 | 39.9 mm (1.6 in) |
| 1975 | 50.0 mm (2.0 in) |
| 1976 | 43.9 mm (1.7 in) |
| 1977 | 48.8 mm (1.9 in) |
| 1978 | 60.2 mm (2.4 in) |
| 1979 | 36.8 mm (1.4 in) |
| 1980 | 51.1 mm (2.0 in) |
| 1981 | 45.7 mm (1.8 in) |
| 1982 | 40.1 mm (1.6 in) |
| 1983 | 38.1 mm (1.5 in) |
| 1984 | 38.9 mm (1.5 in) |
| 1985 | 42.7 mm (1.7 in) |
| 1986 | 52.1 mm (2.1 in) |
| 1987 | 37.6 mm (1.5 in) |
| 1988 | 53.6 mm (2.1 in) |
| 1989 | 30.7 mm (1.2 in) |
| 1990 | 82.0 mm (3.2 in) |
| 1991 | 61.7 mm (2.4 in) |
| 1992 | 42.9 mm (1.7 in) |
| 1993 | 33.0 mm (1.3 in) |
| 1994 | 35.6 mm (1.4 in) |
| 1995 | 35.1 mm (1.4 in) |
| 1996 | 31.5 mm (1.2 in) |
| 1997 | 40.6 mm (1.6 in) |
| 1998 | 49.0 mm (1.9 in) |
| 1999 | 71.9 mm (2.8 in) |
| 2000 | 47.5 mm (1.9 in) |
| 2001 | 54.6 mm (2.1 in) |
| 2002 | 47.8 mm (1.9 in) |
| 2003 | 46.7 mm (1.8 in) |
| 2004 | 44.5 mm (1.8 in) |
| 2005 | 61.0 mm (2.4 in) |
| 2006 | 52.3 mm (2.1 in) |
| 2007 | 45.2 mm (1.8 in) |
| 2008 | 56.4 mm (2.2 in) |
| 2009 | 51.1 mm (2.0 in) |
| 2010 | 57.4 mm (2.3 in) |
| 2011 | 82.3 mm (3.2 in) |
| 2012 | 91.4 mm (3.6 in) |
| 2013 | 35.8 mm (1.4 in) |
| 2014 | 43.4 mm (1.7 in) |
| 2015 | 47.5 mm (1.9 in) |
| 2016 | 41.1 mm (1.6 in) |
| 2017 | 50.5 mm (2.0 in) |
| 2018 | 37.1 mm (1.5 in) |
| 2019 | 39.1 mm (1.5 in) |
| 2020 | 38.6 mm (1.5 in) |
| 2021 | 35.1 mm (1.4 in) |
| 2022 | 61.7 mm (2.4 in) |
| 2023 | 80.0 mm (3.1 in) |
| 2024 | 114.8 mm (4.5 in) |
| 2025 | 47.0 mm (1.9 in) |
| 2026 | 39.1 mm (1.5 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1918 | 79.2 mm (3.1 in) |
| 1919 | 106.2 mm (4.2 in) |
| 1920 | 102.1 mm (4.0 in) |
| 1921 | 51.3 mm (2.0 in) |
| 1922 | 143.7 mm (5.7 in) |
| 1923 | 80.3 mm (3.2 in) |
| 1924 | 121.4 mm (4.8 in) |
| 1930 | 95.0 mm (3.7 in) |
| 1931 | 99.9 mm (3.9 in) |
| 1932 | 94.0 mm (3.7 in) |
| 1933 | 121.1 mm (4.8 in) |
| 1934 | 64.2 mm (2.5 in) |
| 1935 | 59.7 mm (2.4 in) |
| 1936 | 77.2 mm (3.0 in) |
| 1937 | 73.7 mm (2.9 in) |
| 1938 | 76.0 mm (3.0 in) |
| 1939 | 80.8 mm (3.2 in) |
| 1940 | 59.5 mm (2.3 in) |
| 1941 | 60.7 mm (2.4 in) |
| 1942 | 92.8 mm (3.7 in) |
| 1943 | 128.8 mm (5.1 in) |
| 1944 | 62.0 mm (2.4 in) |
| 1945 | 102.2 mm (4.0 in) |
| 1946 | 73.4 mm (2.9 in) |
| 1947 | 88.2 mm (3.5 in) |
| 1948 | 58.7 mm (2.3 in) |
| 1949 | 79.8 mm (3.1 in) |
| 1950 | 73.0 mm (2.9 in) |
| 1951 | 53.0 mm (2.1 in) |
| 1952 | 68.9 mm (2.7 in) |
| 1953 | 73.2 mm (2.9 in) |
| 1954 | 81.0 mm (3.2 in) |
| 1955 | 75.9 mm (3.0 in) |
| 1956 | 54.1 mm (2.1 in) |
| 1957 | 79.6 mm (3.1 in) |
| 1958 | 82.8 mm (3.3 in) |
| 1959 | 86.4 mm (3.4 in) |
| 1960 | 77.2 mm (3.0 in) |
| 1961 | 50.6 mm (2.0 in) |
| 1962 | 83.9 mm (3.3 in) |
| 1963 | 57.1 mm (2.2 in) |
| 1964 | 41.4 mm (1.6 in) |
| 1965 | 66.5 mm (2.6 in) |
| 1966 | 64.6 mm (2.5 in) |
| 1967 | 59.0 mm (2.3 in) |
| 1968 | 50.7 mm (2.0 in) |
| 1969 | 66.8 mm (2.6 in) |
| 1970 | 62.2 mm (2.4 in) |
| 1971 | 52.8 mm (2.1 in) |
| 1972 | 68.9 mm (2.7 in) |
| 1973 | 87.6 mm (3.4 in) |
| 1974 | 87.9 mm (3.5 in) |
| 1975 | 73.6 mm (2.9 in) |
| 1976 | 68.6 mm (2.7 in) |
| 1977 | 67.1 mm (2.6 in) |
| 1978 | 88.9 mm (3.5 in) |
| 1979 | 59.2 mm (2.3 in) |
| 1980 | 79.0 mm (3.1 in) |
| 1981 | 93.0 mm (3.7 in) |
| 1982 | 69.1 mm (2.7 in) |
| 1983 | 66.8 mm (2.6 in) |
| 1984 | 104.4 mm (4.1 in) |
| 1985 | 64.1 mm (2.5 in) |
| 1986 | 73.0 mm (2.9 in) |
| 1987 | 73.5 mm (2.9 in) |
| 1988 | 92.7 mm (3.6 in) |
| 1989 | 79.6 mm (3.1 in) |
| 1990 | 118.1 mm (4.6 in) |
| 1991 | 86.1 mm (3.4 in) |
| 1992 | 65.8 mm (2.6 in) |
| 1993 | 62.0 mm (2.4 in) |
| 1994 | 58.9 mm (2.3 in) |
| 1995 | 55.2 mm (2.2 in) |
| 1996 | 62.7 mm (2.5 in) |
| 1997 | 69.3 mm (2.7 in) |
| 1998 | 109.9 mm (4.3 in) |
| 1999 | 122.7 mm (4.8 in) |
| 2000 | 127.8 mm (5.0 in) |
| 2001 | 71.1 mm (2.8 in) |
| 2002 | 76.5 mm (3.0 in) |
| 2003 | 69.7 mm (2.7 in) |
| 2004 | 70.4 mm (2.8 in) |
| 2005 | 129.9 mm (5.1 in) |
| 2006 | 111.2 mm (4.4 in) |
| 2007 | 86.2 mm (3.4 in) |
| 2008 | 107.0 mm (4.2 in) |
| 2009 | 70.2 mm (2.8 in) |
| 2010 | 101.1 mm (4.0 in) |
| 2011 | 99.3 mm (3.9 in) |
| 2012 | 103.6 mm (4.1 in) |
| 2013 | 94.5 mm (3.7 in) |
| 2014 | 57.4 mm (2.3 in) |
| 2015 | 92.0 mm (3.6 in) |
| 2016 | 87.0 mm (3.4 in) |
| 2017 | 101.1 mm (4.0 in) |
| 2018 | 65.0 mm (2.6 in) |
| 2019 | 65.5 mm (2.6 in) |
| 2020 | 82.3 mm (3.2 in) |
| 2021 | 61.0 mm (2.4 in) |
| 2022 | 92.0 mm (3.6 in) |
| 2023 | 104.7 mm (4.1 in) |
| 2024 | 134.4 mm (5.3 in) |
| 2025 | 56.9 mm (2.2 in) |
| 2026 | 77.5 mm (3.1 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1918 | 17 days |
| 1919 | 12 days |
| 1920 | 9 days |
| 1921 | 14 days |
| 1922 | 10 days |
| 1923 | 9 days |
| 1924 | 15 days |
| 1930 | 14 days |
| 1931 | 14 days |
| 1932 | 17 days |
| 1933 | 9 days |
| 1934 | 9 days |
| 1935 | 11 days |
| 1936 | 11 days |
| 1937 | 13 days |
| 1938 | 10 days |
| 1939 | 17 days |
| 1940 | 10 days |
| 1941 | 13 days |
| 1942 | 10 days |
| 1943 | 14 days |
| 1944 | 16 days |
| 1945 | 14 days |
| 1946 | 16 days |
| 1947 | 16 days |
| 1948 | 16 days |
| 1949 | 9 days |
| 1950 | 15 days |
| 1951 | 15 days |
| 1952 | 13 days |
| 1953 | 15 days |
| 1954 | 9 days |
| 1955 | 12 days |
| 1956 | 13 days |
| 1957 | 14 days |
| 1958 | 8 days |
| 1959 | 10 days |
| 1960 | 8 days |
| 1961 | 12 days |
| 1962 | 13 days |
| 1963 | 10 days |
| 1964 | 13 days |
| 1965 | 12 days |
| 1966 | 14 days |
| 1967 | 11 days |
| 1968 | 8 days |
| 1969 | 9 days |
| 1970 | 10 days |
| 1971 | 12 days |
| 1972 | 12 days |
| 1973 | 11 days |
| 1974 | 8 days |
| 1975 | 12 days |
| 1976 | 16 days |
| 1977 | 12 days |
| 1978 | 16 days |
| 1979 | 16 days |
| 1980 | 19 days |
| 1981 | 14 days |
| 1982 | 11 days |
| 1983 | 9 days |
| 1984 | 12 days |
| 1985 | 13 days |
| 1986 | 12 days |
| 1987 | 16 days |
| 1988 | 10 days |
| 1989 | 11 days |
| 1990 | 12 days |
| 1991 | 10 days |
| 1992 | 12 days |
| 1993 | 10 days |
| 1994 | 10 days |
| 1995 | 17 days |
| 1996 | 12 days |
| 1997 | 12 days |
| 1998 | 16 days |
| 1999 | 16 days |
| 2000 | 9 days |
| 2001 | 9 days |
| 2002 | 12 days |
| 2003 | 13 days |
| 2004 | 12 days |
| 2005 | 15 days |
| 2006 | 9 days |
| 2007 | 13 days |
| 2008 | 12 days |
| 2009 | 14 days |
| 2010 | 19 days |
| 2011 | 11 days |
| 2012 | 11 days |
| 2013 | 13 days |
| 2014 | 12 days |
| 2015 | 10 days |
| 2016 | 8 days |
| 2017 | 17 days |
| 2018 | 10 days |
| 2019 | 8 days |
| 2020 | 13 days |
| 2021 | 10 days |
| 2022 | 10 days |
| 2023 | 17 days |
| 2024 | 16 days |
| 2025 | 13 days |
| 2026 | 9 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
102 years with a frostAcross 102 years with a frost, the median last spring frost at First Connecticut Lake falls on 4 June and the median first autumn frost on 13 September, which leaves a median of 101 days between them.
In 1996 to 2025 the median growing season was 117 days. That is 19 days more than in 1918 to 1952.
Fitted over all years, the growing season changes by +3.1 days per decade at this station.
| Measure | Median, all years | Earliest period (1918 to 1952) | Recent period (1996 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 4 June | 8 June | 30 May | 9 days earlier | -1.7 days per decade |
| First autumn frost | 13 September | 13 September | 20 September | 7 days later | +1.4 days per decade |
| Growing days | 101 days | 98 days | 117 days | 19 days more | +3.1 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
92 years, 1919 to 2025A day with at least 46.3 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 124.8 mm (4.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 46.3 mm (1.8 in) | |
| 5 years | 60.5 mm (2.4 in) | |
| 10 years | 72.2 mm (2.8 in) | |
| 25 years | 90.1 mm (3.5 in) | |
| 50 years | 106.1 mm (4.2 in) | |
| 100 years | 124.8 mm (4.9 in) | Longer than the 92 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, 92 years of values from 1919 to 2025.
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: 114.8 mm (4.5 in) in 2024; 112.3 mm (4.4 in) in 1943; 111.5 mm (4.4 in) in 1922.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of First Connecticut Lake, at 2011. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2011 ran 0.3 C (0.5 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 2011 | +0.3 | +0.5 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Climate Twins
2011 to 2025 against 1961 to 1990Over 2011 to 2025, First Connecticut Lake had a mean temperature of 4.6 C (40.2 F) and 1,208.6 mm (47.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Stillwater Rsvr (United States, 326 km away), St Raphael (Canada, 196 km away) and Old Forge (United States, 330 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Stillwater Rsvr | United States | 326 km (203 mi) | 4.6 C (40.2 F) | 1,172.1 mm (46.1 in) | 0.79 |
| St Raphael | Canada | 196 km (122 mi) | 4.3 C (39.8 F) | 1,145.5 mm (45.1 in) | 1.02 |
| Old Forge | United States | 330 km (205 mi) | 4.4 C (39.9 F) | 1,250.7 mm (49.2 in) | 1.03 |
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
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).