Concord ASOS Weather Records (USW00014745)
Record envelope, standing records and threshold days for Concord ASOS (USW00014745), New Hampshire, United States, with 88 years of record.
Key Facts for Concord ASOS
- Concord ASOS (USW00014745) is a weather station in New Hampshire, United States at 43.20 latitude and -71.50 longitude, 103 m (338 ft) above sea level.
- The station reports from 1939 to 2026, 88 years of record.
- 1,464 records set at Concord ASOS still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Concord ASOS tied a daily record high maximum temperature of 28.9 C (84.0 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: New Hampshire, United States, 43.20 latitude, -71.50 longitude.
- Elevation: 103 m (338 ft).
- Period of record: 1939 to 2026, 88 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
2 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 20.6 C (69.1 F) | -36.1 C (-33.0 F) | 9.4 C (48.9 F) | -23.9 C (-11.0 F) |
| Feb | 23.3 C (73.9 F) | -38.3 C (-36.9 F) | 8.3 C (46.9 F) | -23.3 C (-9.9 F) |
| Mar | 31.7 C (89.1 F) | -26.7 C (-16.1 F) | 22.2 C (72.0 F) | -18.3 C (-0.9 F) |
| Apr | 35.0 C (95.0 F) | -15.5 C (4.1 F) | 28.3 C (82.9 F) | -6.1 C (21.0 F) |
| May | 36.1 C (97.0 F) | -6.1 C (21.0 F) | 35.6 C (96.1 F) | -1.1 C (30.0 F) |
| Jun | 37.8 C (100.0 F) | -3.3 C (26.1 F) | 33.9 C (93.0 F) | 3.9 C (39.0 F) |
| Jul | 38.9 C (102.0 F) | 0.6 C (33.1 F) | 36.1 C (97.0 F) | 9.4 C (48.9 F) |
| Aug | 38.3 C (100.9 F) | -1.7 C (28.9 F) | 33.9 C (93.0 F) | 8.9 C (48.0 F) |
| Sep | 36.7 C (98.1 F) | -6.7 C (19.9 F) | 30.0 C (86.0 F) | 2.2 C (36.0 F) |
| Oct | 32.2 C (90.0 F) | -12.2 C (10.0 F) | 28.9 C (84.0 F) | -1.7 C (28.9 F) |
| Nov | 26.7 C (80.1 F) | -20.6 C (-5.1 F) | n/a | n/a |
| Dec | 22.8 C (73.0 F) | -30.0 C (-22.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1939 | 24 |
| 1940 | 24 |
| 1941 | 11 |
| 1942 | 21 |
| 1943 | 15 |
| 1944 | 17 |
| 1945 | 14 |
| 1946 | 22 |
| 1947 | 24 |
| 1948 | 24 |
| 1949 | 19 |
| 1950 | 25 |
| 1951 | 22 |
| 1952 | 9 |
| 1953 | 17 |
| 1954 | 16 |
| 1955 | 15 |
| 1956 | 25 |
| 1957 | 20 |
| 1958 | 14 |
| 1959 | 15 |
| 1960 | 4 |
| 1961 | 16 |
| 1962 | 15 |
| 1963 | 25 |
| 1964 | 23 |
| 1965 | 20 |
| 1966 | 20 |
| 1967 | 29 |
| 1968 | 21 |
| 1969 | 18 |
| 1970 | 25 |
| 1971 | 17 |
| 1972 | 25 |
| 1973 | 18 |
| 1974 | 24 |
| 1975 | 19 |
| 1976 | 35 |
| 1977 | 28 |
| 1978 | 22 |
| 1979 | 40 |
| 1980 | 14 |
| 1981 | 20 |
| 1982 | 21 |
| 1983 | 13 |
| 1984 | 10 |
| 1985 | 3 |
| 1986 | 12 |
| 1987 | 12 |
| 1988 | 10 |
| 1989 | 12 |
| 1990 | 17 |
| 1991 | 14 |
| 1992 | 12 |
| 1993 | 20 |
| 1994 | 13 |
| 1995 | 14 |
| 1996 | 13 |
| 1997 | 7 |
| 1998 | 7 |
| 1999 | 8 |
| 2000 | 15 |
| 2001 | 8 |
| 2002 | 20 |
| 2003 | 14 |
| 2004 | 9 |
| 2005 | 11 |
| 2006 | 12 |
| 2007 | 20 |
| 2008 | 13 |
| 2009 | 16 |
| 2010 | 11 |
| 2011 | 10 |
| 2012 | 18 |
| 2013 | 11 |
| 2014 | 7 |
| 2015 | 10 |
| 2016 | 13 |
| 2017 | 34 |
| 2018 | 18 |
| 2019 | 3 |
| 2020 | 19 |
| 2021 | 18 |
| 2022 | 19 |
| 2023 | 13 |
| 2024 | 14 |
| 2025 | 14 |
| 2026 | 5 |
All-Time Record Progression
7 new records| Date | Kind | Detail |
|---|---|---|
| 1978-07-22 | Record high minimum temperature | Record high minimum temperature 23.9 C (75.0 F) |
| 2005-10-08 | Record daily precipitation | Record daily precipitation 111.0 mm (4.4 in) |
| 2006-05-13 | Record daily precipitation | Record daily precipitation 130.0 mm (5.1 in) |
| 2008-02-27 | Record snow depth | Record snow depth 106.7 cm (42.0 in) |
| 2008-03-01 | Record snow depth | Record snow depth 111.8 cm (44.0 in) |
| 2008-03-02 | Record snow depth | Record snow depth 114.3 cm (45.0 in) |
| 2020-12-17 | Record daily snowfall | Record daily snowfall 65.0 cm (25.6 in) |
Wettest Day of Each Month
May: 130.0 mm (5.1 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 50.3 mm (2.0 in) | 11 January 1983 |
| Feb | 73.9 mm (2.9 in) | 13 February 2008 |
| Mar | 63.0 mm (2.5 in) | 22 March 2001 |
| Apr | 62.5 mm (2.5 in) | 23 April 2023 |
| May | 130.0 mm (5.1 in) | 13 May 2006 |
| Jun | 99.6 mm (3.9 in) | 21 June 1944 |
| Jul | 65.3 mm (2.6 in) | 24 July 2008 |
| Aug | 97.5 mm (3.8 in) | 19 August 1991 |
| Sep | 104.6 mm (4.1 in) | 12 September 1960 |
| Oct | 111.0 mm (4.4 in) | 8 October 2005 |
| Nov | 73.4 mm (2.9 in) | 8 November 1947 |
| Dec | 69.3 mm (2.7 in) | 18 December 2023 |
Period of Record Coverage
1939 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1939 | 275 | 75% | No |
| 1940 | 365 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 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 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 364 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 363 | 99% | Yes |
| 2016 | 366 | 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 | 365 | 100% | Yes |
| 2026 | 284 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 2 October 2026 | Concord ASOS, US | daily high max (Tie, Provisional) | 28.9 C (84.0 F) | tie | 55 years | 6 of 100 (Routine) |
| 8 August 2026 | Concord ASOS, US | daily high min | 21.7 C (71.1 F) | 1.1 C (2.0 F) | 48 years | 24 of 100 (Routine) |
| 3 July 2026 | Concord ASOS, US | daily high min | 23.3 C (73.9 F) | 1.6 C (2.9 F) | 24 years | 19 of 100 (Routine) |
| 2 July 2026 | Concord ASOS, US | daily high min (Tie) | 21.7 C (71.1 F) | tie | 68 years | 7 of 100 (Routine) |
| 1 July 2026 | Concord ASOS, US | daily high min (Tie) | 20.6 C (69.1 F) | tie | 55 years | 6 of 100 (Routine) |
| 18 June 2026 | Concord ASOS, US | daily rain | 20.1 mm (0.8 in) | 2.8 mm (0.11 in) | 56 years | 20 of 100 (Routine) |
| 11 June 2026 | Concord ASOS, US | daily high min (Tie) | 21.1 C (70.0 F) | tie | 20 years | 3 of 100 (Routine) |
| 20 May 2026 | Concord ASOS, US | daily high min | 17.2 C (63.0 F) | 0.5 C (0.9 F) | 7 years | 11 of 100 (Routine) |
| 15 April 2026 | Concord ASOS, US | daily high min | 11.7 C (53.1 F) | 0.6 C (1.1 F) | 20 years | 15 of 100 (Routine) |
| 10 March 2026 | Concord ASOS, US | daily high max | 22.2 C (72.0 F) | 2.8 C (5.0 F) | 9 years | 14 of 100 (Routine) |
| 25 January 2026 | Concord ASOS, US | daily low max (Tie) | -12.8 C (9.0 F) | tie | 80 years | 8 of 100 (Routine) |
| 29 December 2025 | Concord ASOS, US | daily rain | 38.9 mm (1.5 in) | 7.1 mm (0.28 in) | 59 years | 32 of 100 (Routine) |
| 19 December 2025 | Concord ASOS, US | daily high max | 13.3 C (55.9 F) | 1.6 C (2.9 F) | 58 years | 27 of 100 (Routine) |
| 2 December 2025 | Concord ASOS, US | daily snowfall | 16.8 cm (6.6 in) | 9.9 cm (3.9 in) | 36 years | 33 of 100 (Routine) |
| 6 October 2025 | Concord ASOS, US | daily high max | 30.0 C (86.0 F) | 1.1 C (2.0 F) | 79 years | 33 of 100 (Routine) |
| 4 October 2025 | Concord ASOS, US | daily high max (Tie) | 28.9 C (84.0 F) | tie | 2 years | 2 of 100 (Routine) |
| 28 September 2025 | Concord ASOS, US | daily high max (Tie) | 30.6 C (87.1 F) | tie | 11 years | 2 of 100 (Routine) |
| 30 July 2025 | Concord ASOS, US | daily high max (Tie) | 35.6 C (96.1 F) | tie | 76 years | 7 of 100 (Routine) |
| 29 July 2025 | Concord ASOS, US | daily high max | 36.1 C (97.0 F) | 0.5 C (0.9 F) | 10 years | 12 of 100 (Routine) |
| 17 July 2025 | Concord ASOS, US | daily high min | 22.8 C (73.0 F) | 1.1 C (2.0 F) | 50 years | 25 of 100 (Routine) |
Climate Trend
86 complete years, 1940 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1940 | 6.5 C | -1.37 C |
| 1941 | 7.6 C | -0.30 C |
| 1942 | 7.7 C | -0.15 C |
| 1943 | 6.8 C | -1.08 C |
| 1944 | 7.4 C | -0.48 C |
| 1945 | 7.6 C | -0.29 C |
| 1946 | 7.6 C | -0.25 C |
| 1947 | 7.5 C | -0.36 C |
| 1948 | 7.1 C | -0.74 C |
| 1949 | 8.8 C | +0.95 C |
| 1950 | 7.6 C | -0.26 C |
| 1951 | 7.9 C | 0.00 C |
| 1952 | 8.3 C | +0.40 C |
| 1953 | 9.0 C | +1.18 C |
| 1954 | 7.7 C | -0.16 C |
| 1955 | 7.9 C | +0.03 C |
| 1956 | 6.9 C | -0.97 C |
| 1957 | 8.3 C | +0.41 C |
| 1958 | 7.1 C | -0.80 C |
| 1959 | 8.2 C | +0.35 C |
| 1960 | 7.8 C | -0.07 C |
| 1961 | 8.0 C | +0.14 C |
| 1962 | 7.1 C | -0.75 C |
| 1963 | 7.5 C | -0.36 C |
| 1964 | 7.5 C | -0.31 C |
| 1965 | 6.9 C | -0.91 C |
| 1966 | 7.9 C | +0.03 C |
| 1967 | 6.8 C | -1.02 C |
| 1968 | 6.7 C | -1.11 C |
| 1969 | 7.1 C | -0.78 C |
| 1970 | 7.3 C | -0.57 C |
| 1971 | 7.0 C | -0.86 C |
| 1972 | 6.2 C | -1.64 C |
| 1973 | 8.0 C | +0.11 C |
| 1974 | 6.9 C | -0.99 C |
| 1975 | 7.4 C | -0.41 C |
| 1976 | 6.2 C | -1.62 C |
| 1977 | 7.1 C | -0.79 C |
| 1978 | 6.4 C | -1.46 C |
| 1979 | 8.0 C | +0.18 C |
| 1980 | 6.9 C | -0.99 C |
| 1981 | 7.8 C | -0.10 C |
| 1982 | 7.1 C | -0.72 C |
| 1983 | 8.2 C | +0.34 C |
| 1984 | 7.8 C | -0.06 C |
| 1985 | 7.6 C | -0.26 C |
| 1986 | 7.6 C | -0.27 C |
| 1987 | 7.6 C | -0.21 C |
| 1988 | 7.6 C | -0.28 C |
| 1989 | 7.2 C | -0.66 C |
| 1990 | 8.8 C | +0.97 C |
| 1991 | 8.6 C | +0.78 C |
| 1992 | 7.3 C | -0.60 C |
| 1993 | 7.5 C | -0.37 C |
| 1994 | 7.6 C | -0.30 C |
| 1995 | 7.9 C | +0.09 C |
| 1996 | 7.5 C | -0.35 C |
| 1997 | 7.6 C | -0.29 C |
| 1998 | 9.3 C | +1.44 C |
| 1999 | 8.8 C | +0.91 C |
| 2000 | 7.8 C | -0.05 C |
| 2001 | 8.2 C | +0.31 C |
| 2002 | 8.3 C | +0.48 C |
| 2003 | 7.3 C | -0.52 C |
| 2004 | 8.0 C | +0.13 C |
| 2005 | 7.9 C | +0.06 C |
| 2006 | 9.1 C | +1.25 C |
| 2007 | 7.9 C | +0.06 C |
| 2008 | 7.9 C | +0.02 C |
| 2009 | 7.4 C | -0.49 C |
| 2010 | 9.3 C | +1.44 C |
| 2011 | 8.5 C | +0.69 C |
| 2012 | 9.5 C | +1.68 C |
| 2013 | 8.0 C | +0.13 C |
| 2014 | 7.5 C | -0.34 C |
| 2015 | 8.3 C | +0.47 C |
| 2016 | 9.6 C | +1.78 C |
| 2017 | 9.0 C | +1.16 C |
| 2018 | 8.8 C | +0.91 C |
| 2019 | 7.9 C | +0.08 C |
| 2020 | 9.4 C | +1.53 C |
| 2021 | 9.5 C | +1.66 C |
| 2022 | 9.1 C | +1.27 C |
| 2023 | 9.7 C | +1.82 C |
| 2024 | 9.8 C | +1.93 C |
| 2025 | 8.6 C | +0.76 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1940 to 2025. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 86 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1940 to 2025 | 86 | Rise |
| Mean daily maximum | 0.1 C (0.1 to 0.2) per decade | 0.2 F (0.1 to 0.3) per decade | 1940 to 2025 | 86 | Rise |
| Mean daily minimum | 0.2 C (0.2 to 0.3) per decade | 0.4 F (0.3 to 0.5) per decade | 1940 to 2025 | 86 | 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
1939 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 38.9 C (102.0 F) | 1966 | 35.6 C (96.1 F) | 88 |
| Coldest night (TNn) | -38.3 C (-36.9 F) | 1943 | -26.7 C (-16.1 F) | 88 |
| Wettest day (Rx1day) | 130.0 mm (5.1 in) | 2006 | 54.0 mm (2.1 in) | 88 |
| Wettest five days (Rx5day) | 225.2 mm (8.9 in) | 2006 | 82.3 mm (3.2 in) | 88 |
| Longest dry spell (CDD) | 34 days | 1948 | 16 days | 88 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1939 | 36.1 C (97.0 F) |
| 1940 | 35.0 C (95.0 F) |
| 1941 | 35.6 C (96.1 F) |
| 1942 | 34.4 C (93.9 F) |
| 1943 | 36.1 C (97.0 F) |
| 1944 | 37.2 C (99.0 F) |
| 1945 | 36.1 C (97.0 F) |
| 1946 | 36.1 C (97.0 F) |
| 1947 | 36.7 C (98.1 F) |
| 1948 | 37.8 C (100.0 F) |
| 1949 | 36.1 C (97.0 F) |
| 1950 | 33.9 C (93.0 F) |
| 1951 | 32.8 C (91.0 F) |
| 1952 | 37.2 C (99.0 F) |
| 1953 | 36.7 C (98.1 F) |
| 1954 | 35.0 C (95.0 F) |
| 1955 | 37.8 C (100.0 F) |
| 1956 | 35.6 C (96.1 F) |
| 1957 | 35.0 C (95.0 F) |
| 1958 | 33.9 C (93.0 F) |
| 1959 | 35.0 C (95.0 F) |
| 1960 | 34.4 C (93.9 F) |
| 1961 | 33.9 C (93.0 F) |
| 1962 | 36.1 C (97.0 F) |
| 1963 | 37.2 C (99.0 F) |
| 1964 | 36.1 C (97.0 F) |
| 1965 | 35.6 C (96.1 F) |
| 1966 | 38.9 C (102.0 F) |
| 1967 | 33.3 C (91.9 F) |
| 1968 | 35.0 C (95.0 F) |
| 1969 | 32.2 C (90.0 F) |
| 1970 | 35.6 C (96.1 F) |
| 1971 | 35.0 C (95.0 F) |
| 1972 | 33.3 C (91.9 F) |
| 1973 | 35.6 C (96.1 F) |
| 1974 | 33.9 C (93.0 F) |
| 1975 | 38.3 C (100.9 F) |
| 1976 | 35.0 C (95.0 F) |
| 1977 | 38.3 C (100.9 F) |
| 1978 | 37.8 C (100.0 F) |
| 1979 | 34.4 C (93.9 F) |
| 1980 | 36.7 C (98.1 F) |
| 1981 | 34.4 C (93.9 F) |
| 1982 | 35.0 C (95.0 F) |
| 1983 | 35.0 C (95.0 F) |
| 1984 | 35.0 C (95.0 F) |
| 1985 | 33.9 C (93.0 F) |
| 1986 | 34.4 C (93.9 F) |
| 1987 | 35.0 C (95.0 F) |
| 1988 | 35.6 C (96.1 F) |
| 1989 | 35.0 C (95.0 F) |
| 1990 | 33.9 C (93.0 F) |
| 1991 | 36.7 C (98.1 F) |
| 1992 | 34.4 C (93.9 F) |
| 1993 | 36.7 C (98.1 F) |
| 1994 | 36.7 C (98.1 F) |
| 1995 | 38.3 C (100.9 F) |
| 1996 | 32.8 C (91.0 F) |
| 1997 | 34.4 C (93.9 F) |
| 1998 | 33.3 C (91.9 F) |
| 1999 | 36.1 C (97.0 F) |
| 2000 | 34.4 C (93.9 F) |
| 2001 | 36.7 C (98.1 F) |
| 2002 | 37.2 C (99.0 F) |
| 2003 | 35.0 C (95.0 F) |
| 2004 | 33.9 C (93.0 F) |
| 2005 | 35.0 C (95.0 F) |
| 2006 | 36.1 C (97.0 F) |
| 2007 | 36.1 C (97.0 F) |
| 2008 | 36.7 C (98.1 F) |
| 2009 | 33.9 C (93.0 F) |
| 2010 | 37.2 C (99.0 F) |
| 2011 | 37.8 C (100.0 F) |
| 2012 | 35.6 C (96.1 F) |
| 2013 | 35.0 C (95.0 F) |
| 2014 | 33.3 C (91.9 F) |
| 2015 | 35.6 C (96.1 F) |
| 2016 | 37.2 C (99.0 F) |
| 2017 | 36.1 C (97.0 F) |
| 2018 | 35.6 C (96.1 F) |
| 2019 | 35.6 C (96.1 F) |
| 2020 | 35.6 C (96.1 F) |
| 2021 | 36.1 C (97.0 F) |
| 2022 | 36.7 C (98.1 F) |
| 2023 | 34.4 C (93.9 F) |
| 2024 | 35.6 C (96.1 F) |
| 2025 | 37.8 C (100.0 F) |
| 2026 | 36.1 C (97.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1939 | -18.9 C (-2.0 F) |
| 1940 | -29.4 C (-20.9 F) |
| 1941 | -22.8 C (-9.0 F) |
| 1942 | -31.7 C (-25.1 F) |
| 1943 | -38.3 C (-36.9 F) |
| 1944 | -28.9 C (-20.0 F) |
| 1945 | -28.9 C (-20.0 F) |
| 1946 | -26.1 C (-15.0 F) |
| 1947 | -28.3 C (-18.9 F) |
| 1948 | -32.2 C (-26.0 F) |
| 1949 | -25.0 C (-13.0 F) |
| 1950 | -29.4 C (-20.9 F) |
| 1951 | -30.0 C (-22.0 F) |
| 1952 | -25.6 C (-14.1 F) |
| 1953 | -17.8 C (0.0 F) |
| 1954 | -26.7 C (-16.1 F) |
| 1955 | -28.9 C (-20.0 F) |
| 1956 | -26.1 C (-15.0 F) |
| 1957 | -34.4 C (-29.9 F) |
| 1958 | -26.7 C (-16.1 F) |
| 1959 | -24.4 C (-11.9 F) |
| 1960 | -24.4 C (-11.9 F) |
| 1961 | -32.8 C (-27.0 F) |
| 1962 | -28.3 C (-18.9 F) |
| 1963 | -28.9 C (-20.0 F) |
| 1964 | -26.7 C (-16.1 F) |
| 1965 | -25.6 C (-14.1 F) |
| 1966 | -28.3 C (-18.9 F) |
| 1967 | -30.6 C (-23.1 F) |
| 1968 | -29.4 C (-20.9 F) |
| 1969 | -27.2 C (-17.0 F) |
| 1970 | -30.0 C (-22.0 F) |
| 1971 | -33.9 C (-29.0 F) |
| 1972 | -28.3 C (-18.9 F) |
| 1973 | -28.3 C (-18.9 F) |
| 1974 | -30.0 C (-22.0 F) |
| 1975 | -31.7 C (-25.1 F) |
| 1976 | -34.4 C (-29.9 F) |
| 1977 | -26.7 C (-16.1 F) |
| 1978 | -26.7 C (-16.1 F) |
| 1979 | -26.7 C (-16.1 F) |
| 1980 | -29.4 C (-20.9 F) |
| 1981 | -29.4 C (-20.9 F) |
| 1982 | -31.7 C (-25.1 F) |
| 1983 | -28.3 C (-18.9 F) |
| 1984 | -36.1 C (-33.0 F) |
| 1985 | -28.3 C (-18.9 F) |
| 1986 | -25.6 C (-14.1 F) |
| 1987 | -26.7 C (-16.1 F) |
| 1988 | -30.6 C (-23.1 F) |
| 1989 | -28.9 C (-20.0 F) |
| 1990 | -22.8 C (-9.0 F) |
| 1991 | -23.9 C (-11.0 F) |
| 1992 | -21.7 C (-7.1 F) |
| 1993 | -28.9 C (-20.0 F) |
| 1994 | -33.3 C (-27.9 F) |
| 1995 | -26.1 C (-15.0 F) |
| 1996 | -27.8 C (-18.0 F) |
| 1997 | -21.7 C (-7.1 F) |
| 1998 | -20.6 C (-5.1 F) |
| 1999 | -26.7 C (-16.1 F) |
| 2000 | -23.9 C (-11.0 F) |
| 2001 | -21.1 C (-6.0 F) |
| 2002 | -18.9 C (-2.0 F) |
| 2003 | -28.9 C (-20.0 F) |
| 2004 | -25.0 C (-13.0 F) |
| 2005 | -26.1 C (-15.0 F) |
| 2006 | -17.8 C (0.0 F) |
| 2007 | -21.7 C (-7.1 F) |
| 2008 | -25.0 C (-13.0 F) |
| 2009 | -31.1 C (-24.0 F) |
| 2010 | -18.3 C (-0.9 F) |
| 2011 | -25.0 C (-13.0 F) |
| 2012 | -21.7 C (-7.1 F) |
| 2013 | -24.9 C (-12.8 F) |
| 2014 | -27.1 C (-16.8 F) |
| 2015 | -29.3 C (-20.7 F) |
| 2016 | -24.9 C (-12.8 F) |
| 2017 | -24.3 C (-11.7 F) |
| 2018 | -28.2 C (-18.8 F) |
| 2019 | -23.2 C (-9.8 F) |
| 2020 | -22.1 C (-7.8 F) |
| 2021 | -19.3 C (-2.7 F) |
| 2022 | -23.2 C (-9.8 F) |
| 2023 | -26.0 C (-14.8 F) |
| 2024 | -19.3 C (-2.7 F) |
| 2025 | -27.7 C (-17.9 F) |
| 2026 | -23.9 C (-11.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1939 | 44.2 mm (1.7 in) |
| 1940 | 62.7 mm (2.5 in) |
| 1941 | 47.5 mm (1.9 in) |
| 1942 | 51.3 mm (2.0 in) |
| 1943 | 36.6 mm (1.4 in) |
| 1944 | 99.6 mm (3.9 in) |
| 1945 | 53.1 mm (2.1 in) |
| 1946 | 75.7 mm (3.0 in) |
| 1947 | 73.4 mm (2.9 in) |
| 1948 | 33.0 mm (1.3 in) |
| 1949 | 36.8 mm (1.4 in) |
| 1950 | 67.3 mm (2.6 in) |
| 1951 | 63.5 mm (2.5 in) |
| 1952 | 50.0 mm (2.0 in) |
| 1953 | 65.0 mm (2.6 in) |
| 1954 | 90.4 mm (3.6 in) |
| 1955 | 39.1 mm (1.5 in) |
| 1956 | 41.4 mm (1.6 in) |
| 1957 | 45.7 mm (1.8 in) |
| 1958 | 34.3 mm (1.4 in) |
| 1959 | 61.0 mm (2.4 in) |
| 1960 | 104.6 mm (4.1 in) |
| 1961 | 35.3 mm (1.4 in) |
| 1962 | 101.3 mm (4.0 in) |
| 1963 | 61.0 mm (2.4 in) |
| 1964 | 46.2 mm (1.8 in) |
| 1965 | 32.8 mm (1.3 in) |
| 1966 | 52.3 mm (2.1 in) |
| 1967 | 54.9 mm (2.2 in) |
| 1968 | 41.1 mm (1.6 in) |
| 1969 | 51.1 mm (2.0 in) |
| 1970 | 50.0 mm (2.0 in) |
| 1971 | 61.5 mm (2.4 in) |
| 1972 | 38.1 mm (1.5 in) |
| 1973 | 94.2 mm (3.7 in) |
| 1974 | 41.4 mm (1.6 in) |
| 1975 | 50.5 mm (2.0 in) |
| 1976 | 39.4 mm (1.6 in) |
| 1977 | 55.4 mm (2.2 in) |
| 1978 | 41.1 mm (1.6 in) |
| 1979 | 51.8 mm (2.0 in) |
| 1980 | 61.7 mm (2.4 in) |
| 1981 | 61.0 mm (2.4 in) |
| 1982 | 60.2 mm (2.4 in) |
| 1983 | 50.3 mm (2.0 in) |
| 1984 | 61.5 mm (2.4 in) |
| 1985 | 48.3 mm (1.9 in) |
| 1986 | 38.6 mm (1.5 in) |
| 1987 | 57.2 mm (2.3 in) |
| 1988 | 49.3 mm (1.9 in) |
| 1989 | 51.3 mm (2.0 in) |
| 1990 | 81.8 mm (3.2 in) |
| 1991 | 97.5 mm (3.8 in) |
| 1992 | 36.1 mm (1.4 in) |
| 1993 | 37.6 mm (1.5 in) |
| 1994 | 47.2 mm (1.9 in) |
| 1995 | 55.6 mm (2.2 in) |
| 1996 | 89.7 mm (3.5 in) |
| 1997 | 47.0 mm (1.9 in) |
| 1998 | 59.2 mm (2.3 in) |
| 1999 | 83.8 mm (3.3 in) |
| 2000 | 36.6 mm (1.4 in) |
| 2001 | 63.0 mm (2.5 in) |
| 2002 | 46.0 mm (1.8 in) |
| 2003 | 46.0 mm (1.8 in) |
| 2004 | 61.5 mm (2.4 in) |
| 2005 | 111.0 mm (4.4 in) |
| 2006 | 130.0 mm (5.1 in) |
| 2007 | 54.9 mm (2.2 in) |
| 2008 | 99.6 mm (3.9 in) |
| 2009 | 48.8 mm (1.9 in) |
| 2010 | 63.8 mm (2.5 in) |
| 2011 | 85.1 mm (3.4 in) |
| 2012 | 63.5 mm (2.5 in) |
| 2013 | 61.0 mm (2.4 in) |
| 2014 | 58.9 mm (2.3 in) |
| 2015 | 91.4 mm (3.6 in) |
| 2016 | 76.5 mm (3.0 in) |
| 2017 | 67.3 mm (2.6 in) |
| 2018 | 75.4 mm (3.0 in) |
| 2019 | 48.0 mm (1.9 in) |
| 2020 | 48.0 mm (1.9 in) |
| 2021 | 46.7 mm (1.8 in) |
| 2022 | 39.1 mm (1.5 in) |
| 2023 | 69.3 mm (2.7 in) |
| 2024 | 61.7 mm (2.4 in) |
| 2025 | 46.5 mm (1.8 in) |
| 2026 | 26.7 mm (1.1 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1939 | 43.5 mm (1.7 in) |
| 1940 | 74.9 mm (2.9 in) |
| 1941 | 52.0 mm (2.0 in) |
| 1942 | 72.6 mm (2.9 in) |
| 1943 | 68.4 mm (2.7 in) |
| 1944 | 178.2 mm (7.0 in) |
| 1945 | 83.3 mm (3.3 in) |
| 1946 | 76.0 mm (3.0 in) |
| 1947 | 146.3 mm (5.8 in) |
| 1948 | 56.6 mm (2.2 in) |
| 1949 | 57.6 mm (2.3 in) |
| 1950 | 94.5 mm (3.7 in) |
| 1951 | 97.8 mm (3.9 in) |
| 1952 | 85.6 mm (3.4 in) |
| 1953 | 87.7 mm (3.5 in) |
| 1954 | 92.9 mm (3.7 in) |
| 1955 | 72.0 mm (2.8 in) |
| 1956 | 65.8 mm (2.6 in) |
| 1957 | 69.1 mm (2.7 in) |
| 1958 | 49.8 mm (2.0 in) |
| 1959 | 111.5 mm (4.4 in) |
| 1960 | 141.9 mm (5.6 in) |
| 1961 | 65.8 mm (2.6 in) |
| 1962 | 174.7 mm (6.9 in) |
| 1963 | 86.8 mm (3.4 in) |
| 1964 | 54.1 mm (2.1 in) |
| 1965 | 48.0 mm (1.9 in) |
| 1966 | 70.6 mm (2.8 in) |
| 1967 | 79.1 mm (3.1 in) |
| 1968 | 88.3 mm (3.5 in) |
| 1969 | 94.0 mm (3.7 in) |
| 1970 | 56.9 mm (2.2 in) |
| 1971 | 79.0 mm (3.1 in) |
| 1972 | 59.6 mm (2.3 in) |
| 1973 | 115.1 mm (4.5 in) |
| 1974 | 59.5 mm (2.3 in) |
| 1975 | 106.3 mm (4.2 in) |
| 1976 | 57.6 mm (2.3 in) |
| 1977 | 74.0 mm (2.9 in) |
| 1978 | 54.8 mm (2.2 in) |
| 1979 | 93.8 mm (3.7 in) |
| 1980 | 94.0 mm (3.7 in) |
| 1981 | 107.3 mm (4.2 in) |
| 1982 | 97.5 mm (3.8 in) |
| 1983 | 68.3 mm (2.7 in) |
| 1984 | 158.5 mm (6.2 in) |
| 1985 | 65.1 mm (2.6 in) |
| 1986 | 71.1 mm (2.8 in) |
| 1987 | 72.4 mm (2.9 in) |
| 1988 | 84.9 mm (3.3 in) |
| 1989 | 88.7 mm (3.5 in) |
| 1990 | 93.2 mm (3.7 in) |
| 1991 | 129.3 mm (5.1 in) |
| 1992 | 50.0 mm (2.0 in) |
| 1993 | 41.4 mm (1.6 in) |
| 1994 | 57.9 mm (2.3 in) |
| 1995 | 78.7 mm (3.1 in) |
| 1996 | 158.2 mm (6.2 in) |
| 1997 | 69.3 mm (2.7 in) |
| 1998 | 137.2 mm (5.4 in) |
| 1999 | 105.4 mm (4.1 in) |
| 2000 | 56.7 mm (2.2 in) |
| 2001 | 68.8 mm (2.7 in) |
| 2002 | 54.7 mm (2.2 in) |
| 2003 | 103.1 mm (4.1 in) |
| 2004 | 94.6 mm (3.7 in) |
| 2005 | 158.8 mm (6.3 in) |
| 2006 | 225.2 mm (8.9 in) |
| 2007 | 103.8 mm (4.1 in) |
| 2008 | 141.2 mm (5.6 in) |
| 2009 | 88.5 mm (3.5 in) |
| 2010 | 78.5 mm (3.1 in) |
| 2011 | 105.1 mm (4.1 in) |
| 2012 | 113.6 mm (4.5 in) |
| 2013 | 81.2 mm (3.2 in) |
| 2014 | 97.0 mm (3.8 in) |
| 2015 | 97.2 mm (3.8 in) |
| 2016 | 80.4 mm (3.2 in) |
| 2017 | 124.7 mm (4.9 in) |
| 2018 | 120.9 mm (4.8 in) |
| 2019 | 61.2 mm (2.4 in) |
| 2020 | 75.6 mm (3.0 in) |
| 2021 | 93.7 mm (3.7 in) |
| 2022 | 62.5 mm (2.5 in) |
| 2023 | 85.6 mm (3.4 in) |
| 2024 | 84.6 mm (3.3 in) |
| 2025 | 74.1 mm (2.9 in) |
| 2026 | 66.6 mm (2.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1939 | 5 days |
| 1940 | 14 days |
| 1941 | 22 days |
| 1942 | 16 days |
| 1943 | 20 days |
| 1944 | 16 days |
| 1945 | 14 days |
| 1946 | 18 days |
| 1947 | 26 days |
| 1948 | 34 days |
| 1949 | 22 days |
| 1950 | 25 days |
| 1951 | 11 days |
| 1952 | 14 days |
| 1953 | 23 days |
| 1954 | 20 days |
| 1955 | 25 days |
| 1956 | 15 days |
| 1957 | 19 days |
| 1958 | 21 days |
| 1959 | 15 days |
| 1960 | 18 days |
| 1961 | 16 days |
| 1962 | 15 days |
| 1963 | 28 days |
| 1964 | 15 days |
| 1965 | 15 days |
| 1966 | 14 days |
| 1967 | 15 days |
| 1968 | 22 days |
| 1969 | 15 days |
| 1970 | 17 days |
| 1971 | 14 days |
| 1972 | 14 days |
| 1973 | 16 days |
| 1974 | 13 days |
| 1975 | 15 days |
| 1976 | 20 days |
| 1977 | 18 days |
| 1978 | 23 days |
| 1979 | 20 days |
| 1980 | 24 days |
| 1981 | 13 days |
| 1982 | 17 days |
| 1983 | 16 days |
| 1984 | 18 days |
| 1985 | 15 days |
| 1986 | 13 days |
| 1987 | 28 days |
| 1988 | 16 days |
| 1989 | 13 days |
| 1990 | 13 days |
| 1991 | 14 days |
| 1992 | 22 days |
| 1993 | 12 days |
| 1994 | 11 days |
| 1995 | 20 days |
| 1996 | 32 days |
| 1997 | 18 days |
| 1998 | 14 days |
| 1999 | 18 days |
| 2000 | 11 days |
| 2001 | 12 days |
| 2002 | 14 days |
| 2003 | 15 days |
| 2004 | 15 days |
| 2005 | 14 days |
| 2006 | 19 days |
| 2007 | 23 days |
| 2008 | 26 days |
| 2009 | 14 days |
| 2010 | 21 days |
| 2011 | 16 days |
| 2012 | 20 days |
| 2013 | 17 days |
| 2014 | 16 days |
| 2015 | 27 days |
| 2016 | 17 days |
| 2017 | 22 days |
| 2018 | 14 days |
| 2019 | 10 days |
| 2020 | 25 days |
| 2021 | 17 days |
| 2022 | 11 days |
| 2023 | 16 days |
| 2024 | 16 days |
| 2025 | 15 days |
| 2026 | 11 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
86 years with a frostAcross 86 years with a frost, the median last spring frost at Concord ASOS falls on 15 May and the median first autumn frost on 25 September, which leaves a median of 132 days between them.
In 1996 to 2025 the median growing season was 143 days. That is 16 days more than in 1940 to 1969.
Fitted over all years, the growing season changes by +3.5 days per decade at this station.
| Measure | Median, all years | Earliest period (1940 to 1969) | Recent period (1996 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 15 May | 18 May | 13 May | 5 days earlier | -1.7 days per decade |
| First autumn frost | 25 September | 23 September | 3 October | 10 days later | +1.9 days per decade |
| Growing days | 132 days | 127 days | 143 days | 16 days more | +3.5 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
86 years, 1940 to 2025A day with at least 54.8 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 133.7 mm (5.3 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 54.8 mm (2.2 in) | |
| 5 years | 72.5 mm (2.9 in) | |
| 10 years | 85.4 mm (3.4 in) | |
| 25 years | 103.4 mm (4.1 in) | |
| 50 years | 118.0 mm (4.6 in) | |
| 100 years | 133.7 mm (5.3 in) | Longer than the 86 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, 86 years of values from 1940 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: 130.0 mm (5.1 in) in 2006; 111.0 mm (4.4 in) in 2005; 104.6 mm (4.1 in) in 1960.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Concord ASOS, at 1981 and 2015. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1981 ran 0.4 C (0.6 F) higher than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2015 ran 0.2 C (0.4 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1981 | +0.4 | +0.6 | likely | 5 |
| 2015 | +0.2 | +0.4 | 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, Concord ASOS had a mean temperature of 8.9 C (48.0 F) and 1,096.1 mm (43.2 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Amherst (United States, 124 km away), Falls Village (United States, 207 km away) and Warren (United States, 644 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Amherst | United States | 124 km (77 mi) | 9.0 C (48.1 F) | 1,067.9 mm (42.0 in) | 0.56 |
| Falls Village | United States | 207 km (129 mi) | 8.7 C (47.6 F) | 1,085.8 mm (42.7 in) | 0.57 |
| Warren | United States | 644 km (400 mi) | 8.8 C (47.8 F) | 1,119.2 mm (44.1 in) | 0.64 |
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-14).