Watertown AP Weather Records (USW00094790)
Record envelope, standing records and threshold days for Watertown AP (USW00094790), New York, United States, with 78 years of record.
Key Facts for Watertown AP
- Watertown AP (USW00094790) is a weather station in New York, United States at 43.99 latitude and -76.03 longitude, 95 m (311 ft) above sea level.
- The station reports from 1949 to 2026, 78 years of record.
- 1,464 records set at Watertown AP still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Watertown AP set a daily record precipitation of 40.6 mm (1.6 in) on 13 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 York, United States, 43.99 latitude, -76.03 longitude.
- Elevation: 95 m (311 ft).
- Period of record: 1949 to 2026, 78 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
7 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 18.9 C (66.0 F) | -41.7 C (-43.1 F) | 10.6 C (51.1 F) | -36.7 C (-34.1 F) |
| Feb | 20.6 C (69.1 F) | -38.2 C (-36.8 F) | 7.8 C (46.0 F) | -37.8 C (-36.0 F) |
| Mar | 28.9 C (84.0 F) | -31.1 C (-24.0 F) | 19.4 C (66.9 F) | -19.4 C (-2.9 F) |
| Apr | 31.7 C (89.1 F) | -14.4 C (6.1 F) | 26.7 C (80.1 F) | -11.1 C (12.0 F) |
| May | 32.8 C (91.0 F) | -7.8 C (18.0 F) | 31.1 C (88.0 F) | -1.7 C (28.9 F) |
| Jun | 35.0 C (95.0 F) | -1.7 C (28.9 F) | 30.6 C (87.1 F) | 2.2 C (36.0 F) |
| Jul | 36.1 C (97.0 F) | 0.6 C (33.1 F) | 32.8 C (91.0 F) | 8.3 C (46.9 F) |
| Aug | 35.6 C (96.1 F) | -1.1 C (30.0 F) | 30.6 C (87.1 F) | 8.3 C (46.9 F) |
| Sep | 35.6 C (96.1 F) | -5.6 C (21.9 F) | 28.3 C (82.9 F) | 1.7 C (35.1 F) |
| Oct | 28.9 C (84.0 F) | -11.1 C (12.0 F) | 21.7 C (71.1 F) | 0.0 C (32.0 F) |
| Nov | 25.0 C (77.0 F) | -21.6 C (-6.9 F) | n/a | n/a |
| Dec | 20.6 C (69.1 F) | -38.3 C (-36.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1949 | 29 |
| 1950 | 22 |
| 1951 | 18 |
| 1952 | 11 |
| 1953 | 27 |
| 1954 | 18 |
| 1955 | 27 |
| 1956 | 11 |
| 1957 | 22 |
| 1958 | 11 |
| 1959 | 27 |
| 1960 | 7 |
| 1961 | 28 |
| 1962 | 26 |
| 1963 | 25 |
| 1964 | 28 |
| 1965 | 25 |
| 1966 | 29 |
| 1967 | 18 |
| 1968 | 25 |
| 1969 | 23 |
| 1970 | 20 |
| 1971 | 11 |
| 1972 | 28 |
| 1973 | 27 |
| 1974 | 29 |
| 1975 | 13 |
| 1976 | 30 |
| 1977 | 16 |
| 1978 | 15 |
| 1979 | 33 |
| 1980 | 13 |
| 1981 | 26 |
| 1982 | 24 |
| 1983 | 13 |
| 1984 | 21 |
| 1985 | 8 |
| 1986 | 14 |
| 1987 | 16 |
| 1988 | 27 |
| 1989 | 26 |
| 1990 | 23 |
| 1991 | 19 |
| 1992 | 18 |
| 1993 | 20 |
| 1994 | 17 |
| 1995 | 15 |
| 1996 | 15 |
| 1997 | 14 |
| 1998 | 13 |
| 1999 | 18 |
| 2000 | 20 |
| 2001 | 14 |
| 2002 | 20 |
| 2003 | 12 |
| 2004 | 12 |
| 2005 | 17 |
| 2006 | 13 |
| 2007 | 22 |
| 2008 | 14 |
| 2009 | 7 |
| 2010 | 7 |
| 2011 | 10 |
| 2012 | 28 |
| 2013 | 15 |
| 2014 | 17 |
| 2015 | 16 |
| 2016 | 15 |
| 2017 | 28 |
| 2018 | 20 |
| 2019 | 13 |
| 2020 | 16 |
| 2021 | 13 |
| 2022 | 13 |
| 2023 | 10 |
| 2024 | 26 |
| 2025 | 16 |
| 2026 | 11 |
All-Time Record Progression
9 new records| Date | Kind | Detail |
|---|---|---|
| 1980-12-25 | Record low minimum temperature | Record low minimum temperature -38.3 C (-36.9 F) |
| 1981-01-03 | Record low maximum temperature | Record low maximum temperature -24.4 C (-11.9 F) |
| 1981-01-04 | Record low minimum temperature | Record low minimum temperature -38.9 C (-38.0 F) |
| 1981-08-08 | Record daily precipitation | Record daily precipitation 103.9 mm (4.1 in) |
| 1988-08-04 | Record high minimum temperature | Record high minimum temperature 25.0 C (77.0 F) |
| 1994-01-16 | Record low minimum temperature | Record low minimum temperature -41.7 C (-43.1 F) |
| 1995-12-10 | Record daily snowfall | Record daily snowfall 114.3 cm (45.0 in) |
| 2006-08-01 | Record high minimum temperature | Record high minimum temperature 25.6 C (78.1 F) |
| 2011-07-21 | Record high minimum temperature | Record high minimum temperature 26.1 C (79.0 F) |
Wettest Day of Each Month
Aug: 103.9 mm (4.1 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 57.9 mm (2.3 in) | 8 January 1998 |
| Feb | 53.8 mm (2.1 in) | 16 February 1954 |
| Mar | 47.0 mm (1.9 in) | 4 March 1971 |
| Apr | 49.8 mm (2.0 in) | 2 April 2005 |
| May | 54.9 mm (2.2 in) | 30 May 1956 |
| Jun | 83.3 mm (3.3 in) | 23 June 2017 |
| Jul | 59.4 mm (2.3 in) | 6 July 1959 |
| Aug | 103.9 mm (4.1 in) | 8 August 1981 |
| Sep | 93.0 mm (3.7 in) | 16 September 2005 |
| Oct | 93.2 mm (3.7 in) | 9 October 2017 |
| Nov | 75.4 mm (3.0 in) | 29 November 1963 |
| Dec | 57.4 mm (2.3 in) | 10 December 1995 |
Period of Record Coverage
1949 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1949 | 242 | 66% | No |
| 1950 | 365 | 100% | Yes |
| 1951 | 364 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 364 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 364 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 362 | 99% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 363 | 99% | Yes |
| 1961 | 364 | 100% | Yes |
| 1962 | 363 | 99% | 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 | 364 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 364 | 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 | 363 | 99% | Yes |
| 1983 | 273 | 75% | No |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 364 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 364 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 365 | 100% | Yes |
| 1993 | 364 | 100% | Yes |
| 1994 | 364 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 364 | 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 | 362 | 99% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 363 | 99% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 361 | 99% | Yes |
| 2022 | 364 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 287 | 79% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 13 October 2026 | Watertown AP, US | daily rain (Provisional) | 40.6 mm (1.6 in) | 9.4 mm (0.37 in) | 20 years | 24 of 100 (Routine) |
| 24 August 2026 | Watertown AP, US | daily rain (Provisional) | 54.9 mm (2.2 in) | 19.6 mm (0.8 in) | 28 years | 31 of 100 (Routine) |
| 14 June 2026 | Watertown AP, US | daily rain | 41.1 mm (1.6 in) | 16.2 mm (0.6 in) | 21 years | 32 of 100 (Routine) |
| 10 June 2026 | Watertown AP, US | daily high min | 21.1 C (70.0 F) | 0.5 C (0.9 F) | 52 years | 23 of 100 (Routine) |
| 19 May 2026 | Watertown AP, US | daily high min | 18.3 C (64.9 F) | 1.1 C (2.0 F) | 55 years | 25 of 100 (Routine) |
| 18 May 2026 | Watertown AP, US | daily high max | 31.1 C (88.0 F) | 1.1 C (2.0 F) | 76 years | 32 of 100 (Routine) |
| 29 April 2026 | Watertown AP, US | daily rain | 22.6 mm (0.9 in) | 1.3 mm (0.05 in) | 69 years | 20 of 100 (Routine) |
| 14 April 2026 | Watertown AP, US | daily rain | 22.1 mm (0.9 in) | 7.9 mm (0.31 in) | 24 years | 20 of 100 (Routine) |
| 31 March 2026 | Watertown AP, US | daily rain | 43.9 mm (1.7 in) | 26.6 mm (1.0 in) | 9 years | 49 of 100 (Notable) |
| 10 March 2026 | Watertown AP, US | daily high max | 17.2 C (63.0 F) | 1.6 C (2.9 F) | 71 years | 30 of 100 (Routine) |
| 8 March 2026 | Watertown AP, US | daily high min (Tie) | 2.8 C (37.0 F) | tie | 43 years | 4 of 100 (Routine) |
| 7 March 2026 | Watertown AP, US | daily high min | 6.1 C (43.0 F) | 0.5 C (0.9 F) | 8 years | 9 of 100 (Routine) |
| 20 February 2026 | Watertown AP, US | daily rain | 21.1 mm (0.8 in) | 3.3 mm (0.13 in) | 44 years | 20 of 100 (Routine) |
| 9 February 2026 | Watertown AP, US | daily low min | -32.8 C (-27.0 F) | 1.1 C (2.0 F) | 32 years | 17 of 100 (Routine) |
| 8 February 2026 | Watertown AP, US | daily low min | -37.8 C (-36.0 F) | 7.8 C (14.0 F) | 59 years | 32 of 100 (Routine) |
| 30 January 2026 | Watertown AP, US | daily low max | -15.0 C (5.0 F) | 1.1 C (2.0 F) | 32 years | 17 of 100 (Routine) |
| 30 January 2026 | Watertown AP, US | daily low min | -36.1 C (-33.0 F) | 4.0 C (7.2 F) | 4 years | 12 of 100 (Routine) |
| 29 January 2026 | Watertown AP, US | daily low min | -32.8 C (-27.0 F) | 2.3 C (4.1 F) | 4 years | 10 of 100 (Routine) |
| 24 January 2026 | Watertown AP, US | daily low min | -36.7 C (-34.1 F) | 1.7 C (3.1 F) | 23 years | 14 of 100 (Routine) |
| 24 January 2026 | Watertown AP, US | daily low max (Tie) | -17.8 C (0.0 F) | tie | 22 years | 3 of 100 (Routine) |
Climate Trend
75 complete years, 1950 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1950 | 7.3 C | -0.07 C |
| 1951 | 7.9 C | +0.54 C |
| 1952 | 8.5 C | +1.08 C |
| 1953 | 8.9 C | +1.56 C |
| 1954 | 7.5 C | +0.16 C |
| 1955 | 8.0 C | +0.59 C |
| 1956 | 7.0 C | -0.40 C |
| 1957 | 8.2 C | +0.83 C |
| 1958 | 6.6 C | -0.76 C |
| 1959 | 7.7 C | +0.30 C |
| 1960 | 7.0 C | -0.36 C |
| 1961 | 6.6 C | -0.80 C |
| 1962 | 6.0 C | -1.43 C |
| 1963 | 6.3 C | -1.08 C |
| 1964 | 7.5 C | +0.14 C |
| 1965 | 6.7 C | -0.69 C |
| 1966 | 7.0 C | -0.40 C |
| 1967 | 7.3 C | -0.09 C |
| 1968 | 6.4 C | -1.00 C |
| 1969 | 6.1 C | -1.33 C |
| 1970 | 6.7 C | -0.66 C |
| 1971 | 7.7 C | +0.30 C |
| 1972 | 5.9 C | -1.46 C |
| 1973 | 8.3 C | +0.89 C |
| 1974 | 6.5 C | -0.87 C |
| 1975 | 7.6 C | +0.21 C |
| 1976 | 6.8 C | -0.55 C |
| 1977 | 7.2 C | -0.23 C |
| 1978 | 6.1 C | -1.28 C |
| 1979 | 6.9 C | -0.46 C |
| 1980 | 6.6 C | -0.83 C |
| 1981 | 6.9 C | -0.49 C |
| 1982 | 6.7 C | -0.72 C |
| 1984 | 6.6 C | -0.75 C |
| 1985 | 6.7 C | -0.66 C |
| 1986 | 7.1 C | -0.28 C |
| 1987 | 7.8 C | +0.41 C |
| 1988 | 7.3 C | -0.12 C |
| 1989 | 6.1 C | -1.26 C |
| 1990 | 8.3 C | +0.93 C |
| 1991 | 8.2 C | +0.78 C |
| 1992 | 6.2 C | -1.16 C |
| 1993 | 6.7 C | -0.68 C |
| 1994 | 6.7 C | -0.65 C |
| 1995 | 7.2 C | -0.21 C |
| 1996 | 6.9 C | -0.49 C |
| 1997 | 6.7 C | -0.73 C |
| 1998 | 8.9 C | +1.48 C |
| 1999 | 8.0 C | +0.64 C |
| 2000 | 6.5 C | -0.93 C |
| 2001 | 8.2 C | +0.77 C |
| 2002 | 7.9 C | +0.51 C |
| 2003 | 6.6 C | -0.82 C |
| 2004 | 6.5 C | -0.87 C |
| 2005 | 7.4 C | -0.01 C |
| 2006 | 8.6 C | +1.18 C |
| 2007 | 7.3 C | -0.05 C |
| 2008 | 7.4 C | +0.02 C |
| 2009 | 6.8 C | -0.59 C |
| 2010 | 8.2 C | +0.82 C |
| 2011 | 8.3 C | +0.95 C |
| 2012 | 9.5 C | +2.16 C |
| 2013 | 7.8 C | +0.44 C |
| 2014 | 7.5 C | +0.12 C |
| 2015 | 7.3 C | -0.07 C |
| 2016 | 8.3 C | +0.95 C |
| 2017 | 8.0 C | +0.64 C |
| 2018 | 7.8 C | +0.39 C |
| 2019 | 6.9 C | -0.52 C |
| 2020 | 8.8 C | +1.39 C |
| 2021 | 8.7 C | +1.33 C |
| 2022 | 7.9 C | +0.48 C |
| 2023 | 8.9 C | +1.49 C |
| 2024 | 9.6 C | +2.19 C |
| 2025 | 7.7 C | +0.35 C |
The annual mean temperature here has risen by 0.13 C (0.05 to 0.22) per decade over 1950 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 75 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.13 C (0.05 to 0.22) per decade | 0.2 F (0.1 to 0.4) per decade | 1950 to 2025 | 75 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.3) per decade | 0.3 F (0.2 to 0.5) per decade | 1950 to 2025 | 75 | Rise |
| Mean daily minimum | 0.08 C (-0.01 to 0.18) per decade | 0.15 F (-0.02 to 0.32) per decade | 1950 to 2025 | 75 | 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
1949 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 36.1 C (97.0 F) | 1953 | 32.8 C (91.0 F) | 78 |
| Coldest night (TNn) | -41.7 C (-43.1 F) | 1994 | -31.9 C (-25.4 F) | 78 |
| Wettest day (Rx1day) | 103.9 mm (4.1 in) | 1981 | 47.8 mm (1.9 in) | 78 |
| Wettest five days (Rx5day) | 138.4 mm (5.4 in) | 2017 | 72.4 mm (2.8 in) | 78 |
| Longest dry spell (CDD) | 32 days | 1967 | 16 days | 78 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1949 | 35.0 C (95.0 F) |
| 1950 | 31.1 C (88.0 F) |
| 1951 | 31.7 C (89.1 F) |
| 1952 | 32.8 C (91.0 F) |
| 1953 | 36.1 C (97.0 F) |
| 1954 | 31.1 C (88.0 F) |
| 1955 | 35.6 C (96.1 F) |
| 1956 | 31.1 C (88.0 F) |
| 1957 | 32.8 C (91.0 F) |
| 1958 | 31.7 C (89.1 F) |
| 1959 | 32.8 C (91.0 F) |
| 1960 | 31.1 C (88.0 F) |
| 1961 | 32.2 C (90.0 F) |
| 1962 | 32.8 C (91.0 F) |
| 1963 | 33.9 C (93.0 F) |
| 1964 | 34.4 C (93.9 F) |
| 1965 | 34.4 C (93.9 F) |
| 1966 | 35.0 C (95.0 F) |
| 1967 | 33.3 C (91.9 F) |
| 1968 | 32.2 C (90.0 F) |
| 1969 | 32.8 C (91.0 F) |
| 1970 | 34.4 C (93.9 F) |
| 1971 | 33.3 C (91.9 F) |
| 1972 | 31.1 C (88.0 F) |
| 1973 | 33.9 C (93.0 F) |
| 1974 | 31.1 C (88.0 F) |
| 1975 | 33.9 C (93.0 F) |
| 1976 | 31.1 C (88.0 F) |
| 1977 | 33.3 C (91.9 F) |
| 1978 | 33.9 C (93.0 F) |
| 1979 | 32.8 C (91.0 F) |
| 1980 | 32.2 C (90.0 F) |
| 1981 | 30.0 C (86.0 F) |
| 1982 | 31.7 C (89.1 F) |
| 1983 | 31.1 C (88.0 F) |
| 1984 | 30.0 C (86.0 F) |
| 1985 | 32.2 C (90.0 F) |
| 1986 | 31.1 C (88.0 F) |
| 1987 | 33.9 C (93.0 F) |
| 1988 | 35.0 C (95.0 F) |
| 1989 | 30.6 C (87.1 F) |
| 1990 | 32.8 C (91.0 F) |
| 1991 | 31.7 C (89.1 F) |
| 1992 | 30.0 C (86.0 F) |
| 1993 | 33.9 C (93.0 F) |
| 1994 | 34.4 C (93.9 F) |
| 1995 | 33.9 C (93.0 F) |
| 1996 | 31.7 C (89.1 F) |
| 1997 | 31.7 C (89.1 F) |
| 1998 | 31.7 C (89.1 F) |
| 1999 | 34.4 C (93.9 F) |
| 2000 | 28.9 C (84.0 F) |
| 2001 | 33.9 C (93.0 F) |
| 2002 | 34.4 C (93.9 F) |
| 2003 | 33.3 C (91.9 F) |
| 2004 | 30.0 C (86.0 F) |
| 2005 | 33.3 C (91.9 F) |
| 2006 | 32.8 C (91.0 F) |
| 2007 | 35.0 C (95.0 F) |
| 2008 | 32.2 C (90.0 F) |
| 2009 | 31.7 C (89.1 F) |
| 2010 | 32.2 C (90.0 F) |
| 2011 | 32.8 C (91.0 F) |
| 2012 | 35.0 C (95.0 F) |
| 2013 | 32.8 C (91.0 F) |
| 2014 | 32.2 C (90.0 F) |
| 2015 | 32.2 C (90.0 F) |
| 2016 | 32.8 C (91.0 F) |
| 2017 | 32.2 C (90.0 F) |
| 2018 | 33.3 C (91.9 F) |
| 2019 | 32.2 C (90.0 F) |
| 2020 | 35.0 C (95.0 F) |
| 2021 | 31.7 C (89.1 F) |
| 2022 | 32.2 C (90.0 F) |
| 2023 | 33.9 C (93.0 F) |
| 2024 | 32.8 C (91.0 F) |
| 2025 | 32.8 C (91.0 F) |
| 2026 | 32.8 C (91.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1949 | -17.8 C (0.0 F) |
| 1950 | -26.7 C (-16.1 F) |
| 1951 | -25.6 C (-14.1 F) |
| 1952 | -23.9 C (-11.0 F) |
| 1953 | -20.6 C (-5.1 F) |
| 1954 | -28.9 C (-20.0 F) |
| 1955 | -33.9 C (-29.0 F) |
| 1956 | -24.4 C (-11.9 F) |
| 1957 | -34.4 C (-29.9 F) |
| 1958 | -26.7 C (-16.1 F) |
| 1959 | -26.7 C (-16.1 F) |
| 1960 | -25.6 C (-14.1 F) |
| 1961 | -36.1 C (-33.0 F) |
| 1962 | -32.2 C (-26.0 F) |
| 1963 | -36.1 C (-33.0 F) |
| 1964 | -26.1 C (-15.0 F) |
| 1965 | -27.8 C (-18.0 F) |
| 1966 | -30.0 C (-22.0 F) |
| 1967 | -31.1 C (-24.0 F) |
| 1968 | -37.8 C (-36.0 F) |
| 1969 | -26.1 C (-15.0 F) |
| 1970 | -35.6 C (-32.1 F) |
| 1971 | -31.7 C (-25.1 F) |
| 1972 | -33.9 C (-29.0 F) |
| 1973 | -36.7 C (-34.1 F) |
| 1974 | -28.3 C (-18.9 F) |
| 1975 | -25.6 C (-14.1 F) |
| 1976 | -35.0 C (-31.0 F) |
| 1977 | -35.6 C (-32.1 F) |
| 1978 | -31.7 C (-25.1 F) |
| 1979 | -36.7 C (-34.1 F) |
| 1980 | -38.3 C (-36.9 F) |
| 1981 | -38.9 C (-38.0 F) |
| 1982 | -33.9 C (-29.0 F) |
| 1983 | -30.0 C (-22.0 F) |
| 1984 | -37.8 C (-36.0 F) |
| 1985 | -29.4 C (-20.9 F) |
| 1986 | -32.2 C (-26.0 F) |
| 1987 | -34.4 C (-29.9 F) |
| 1988 | -28.3 C (-18.9 F) |
| 1989 | -38.3 C (-36.9 F) |
| 1990 | -26.7 C (-16.1 F) |
| 1991 | -27.2 C (-17.0 F) |
| 1992 | -31.1 C (-24.0 F) |
| 1993 | -33.9 C (-29.0 F) |
| 1994 | -41.7 C (-43.1 F) |
| 1995 | -30.6 C (-23.1 F) |
| 1996 | -34.4 C (-29.9 F) |
| 1997 | -34.4 C (-29.9 F) |
| 1998 | -30.0 C (-22.0 F) |
| 1999 | -34.4 C (-29.9 F) |
| 2000 | -31.1 C (-24.0 F) |
| 2001 | -27.8 C (-18.0 F) |
| 2002 | -28.9 C (-20.0 F) |
| 2003 | -36.1 C (-33.0 F) |
| 2004 | -36.1 C (-33.0 F) |
| 2005 | -35.6 C (-32.1 F) |
| 2006 | -31.7 C (-25.1 F) |
| 2007 | -37.2 C (-35.0 F) |
| 2008 | -27.8 C (-18.0 F) |
| 2009 | -33.9 C (-29.0 F) |
| 2010 | -31.1 C (-24.0 F) |
| 2011 | -34.4 C (-29.9 F) |
| 2012 | -31.1 C (-24.0 F) |
| 2013 | -29.9 C (-21.8 F) |
| 2014 | -38.2 C (-36.8 F) |
| 2015 | -37.7 C (-35.9 F) |
| 2016 | -38.2 C (-36.8 F) |
| 2017 | -35.5 C (-31.9 F) |
| 2018 | -36.0 C (-32.8 F) |
| 2019 | -34.3 C (-29.7 F) |
| 2020 | -29.3 C (-20.7 F) |
| 2021 | -28.8 C (-19.8 F) |
| 2022 | -32.1 C (-25.8 F) |
| 2023 | -36.0 C (-32.8 F) |
| 2024 | -26.6 C (-15.9 F) |
| 2025 | -27.8 C (-18.0 F) |
| 2026 | -37.8 C (-36.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1949 | 27.7 mm (1.1 in) |
| 1950 | 73.7 mm (2.9 in) |
| 1951 | 35.6 mm (1.4 in) |
| 1952 | 40.1 mm (1.6 in) |
| 1953 | 52.3 mm (2.1 in) |
| 1954 | 53.8 mm (2.1 in) |
| 1955 | 58.2 mm (2.3 in) |
| 1956 | 54.9 mm (2.2 in) |
| 1957 | 48.0 mm (1.9 in) |
| 1958 | 27.9 mm (1.1 in) |
| 1959 | 59.4 mm (2.3 in) |
| 1960 | 34.8 mm (1.4 in) |
| 1961 | 42.7 mm (1.7 in) |
| 1962 | 65.3 mm (2.6 in) |
| 1963 | 75.4 mm (3.0 in) |
| 1964 | 43.7 mm (1.7 in) |
| 1965 | 22.9 mm (0.9 in) |
| 1966 | 38.1 mm (1.5 in) |
| 1967 | 31.5 mm (1.2 in) |
| 1968 | 46.7 mm (1.8 in) |
| 1969 | 22.1 mm (0.9 in) |
| 1970 | 42.4 mm (1.7 in) |
| 1971 | 54.6 mm (2.1 in) |
| 1972 | 51.6 mm (2.0 in) |
| 1973 | 47.5 mm (1.9 in) |
| 1974 | 25.4 mm (1.0 in) |
| 1975 | 58.7 mm (2.3 in) |
| 1976 | 41.7 mm (1.6 in) |
| 1977 | 57.9 mm (2.3 in) |
| 1978 | 61.7 mm (2.4 in) |
| 1979 | 64.3 mm (2.5 in) |
| 1980 | 43.9 mm (1.7 in) |
| 1981 | 103.9 mm (4.1 in) |
| 1982 | 47.0 mm (1.9 in) |
| 1983 | 41.1 mm (1.6 in) |
| 1984 | 50.0 mm (2.0 in) |
| 1985 | 39.6 mm (1.6 in) |
| 1986 | 54.4 mm (2.1 in) |
| 1987 | 54.4 mm (2.1 in) |
| 1988 | 34.3 mm (1.4 in) |
| 1989 | 35.1 mm (1.4 in) |
| 1990 | 29.7 mm (1.2 in) |
| 1991 | 27.9 mm (1.1 in) |
| 1992 | 48.0 mm (1.9 in) |
| 1993 | 32.0 mm (1.3 in) |
| 1994 | 52.6 mm (2.1 in) |
| 1995 | 57.4 mm (2.3 in) |
| 1996 | 66.5 mm (2.6 in) |
| 1997 | 46.0 mm (1.8 in) |
| 1998 | 57.9 mm (2.3 in) |
| 1999 | 51.3 mm (2.0 in) |
| 2000 | 33.0 mm (1.3 in) |
| 2001 | 45.5 mm (1.8 in) |
| 2002 | 54.1 mm (2.1 in) |
| 2003 | 42.2 mm (1.7 in) |
| 2004 | 63.8 mm (2.5 in) |
| 2005 | 99.1 mm (3.9 in) |
| 2006 | 40.4 mm (1.6 in) |
| 2007 | 38.1 mm (1.5 in) |
| 2008 | 39.6 mm (1.6 in) |
| 2009 | 34.0 mm (1.3 in) |
| 2010 | 73.7 mm (2.9 in) |
| 2011 | 79.8 mm (3.1 in) |
| 2012 | 66.5 mm (2.6 in) |
| 2013 | 31.0 mm (1.2 in) |
| 2014 | 58.2 mm (2.3 in) |
| 2015 | 42.9 mm (1.7 in) |
| 2016 | 41.7 mm (1.6 in) |
| 2017 | 93.2 mm (3.7 in) |
| 2018 | 51.8 mm (2.0 in) |
| 2019 | 47.0 mm (1.9 in) |
| 2020 | 37.3 mm (1.5 in) |
| 2021 | 59.9 mm (2.4 in) |
| 2022 | 48.8 mm (1.9 in) |
| 2023 | 47.0 mm (1.9 in) |
| 2024 | 70.9 mm (2.8 in) |
| 2025 | 51.1 mm (2.0 in) |
| 2026 | 54.9 mm (2.2 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1949 | 38.9 mm (1.5 in) |
| 1950 | 75.0 mm (3.0 in) |
| 1951 | 67.6 mm (2.7 in) |
| 1952 | 66.2 mm (2.6 in) |
| 1953 | 67.0 mm (2.6 in) |
| 1954 | 73.8 mm (2.9 in) |
| 1955 | 81.1 mm (3.2 in) |
| 1956 | 59.9 mm (2.4 in) |
| 1957 | 68.3 mm (2.7 in) |
| 1958 | 53.8 mm (2.1 in) |
| 1959 | 71.6 mm (2.8 in) |
| 1960 | 53.5 mm (2.1 in) |
| 1961 | 50.3 mm (2.0 in) |
| 1962 | 101.4 mm (4.0 in) |
| 1963 | 87.6 mm (3.4 in) |
| 1964 | 83.0 mm (3.3 in) |
| 1965 | 40.6 mm (1.6 in) |
| 1966 | 54.1 mm (2.1 in) |
| 1967 | 55.3 mm (2.2 in) |
| 1968 | 60.2 mm (2.4 in) |
| 1969 | 60.2 mm (2.4 in) |
| 1970 | 68.8 mm (2.7 in) |
| 1971 | 72.4 mm (2.9 in) |
| 1972 | 55.7 mm (2.2 in) |
| 1973 | 61.2 mm (2.4 in) |
| 1974 | 42.9 mm (1.7 in) |
| 1975 | 117.2 mm (4.6 in) |
| 1976 | 72.3 mm (2.8 in) |
| 1977 | 80.2 mm (3.2 in) |
| 1978 | 82.0 mm (3.2 in) |
| 1979 | 68.9 mm (2.7 in) |
| 1980 | 61.9 mm (2.4 in) |
| 1981 | 132.3 mm (5.2 in) |
| 1982 | 75.5 mm (3.0 in) |
| 1983 | 64.3 mm (2.5 in) |
| 1984 | 80.1 mm (3.2 in) |
| 1985 | 65.8 mm (2.6 in) |
| 1986 | 72.7 mm (2.9 in) |
| 1987 | 83.8 mm (3.3 in) |
| 1988 | 75.0 mm (3.0 in) |
| 1989 | 54.4 mm (2.1 in) |
| 1990 | 52.3 mm (2.1 in) |
| 1991 | 63.7 mm (2.5 in) |
| 1992 | 63.7 mm (2.5 in) |
| 1993 | 67.1 mm (2.6 in) |
| 1994 | 99.3 mm (3.9 in) |
| 1995 | 92.0 mm (3.6 in) |
| 1996 | 78.7 mm (3.1 in) |
| 1997 | 76.0 mm (3.0 in) |
| 1998 | 109.2 mm (4.3 in) |
| 1999 | 96.8 mm (3.8 in) |
| 2000 | 69.4 mm (2.7 in) |
| 2001 | 77.5 mm (3.1 in) |
| 2002 | 62.8 mm (2.5 in) |
| 2003 | 74.1 mm (2.9 in) |
| 2004 | 76.8 mm (3.0 in) |
| 2005 | 114.4 mm (4.5 in) |
| 2006 | 59.8 mm (2.4 in) |
| 2007 | 51.4 mm (2.0 in) |
| 2008 | 74.0 mm (2.9 in) |
| 2009 | 62.2 mm (2.4 in) |
| 2010 | 103.1 mm (4.1 in) |
| 2011 | 94.3 mm (3.7 in) |
| 2012 | 72.6 mm (2.9 in) |
| 2013 | 46.0 mm (1.8 in) |
| 2014 | 73.0 mm (2.9 in) |
| 2015 | 60.6 mm (2.4 in) |
| 2016 | 78.8 mm (3.1 in) |
| 2017 | 138.4 mm (5.4 in) |
| 2018 | 52.3 mm (2.1 in) |
| 2019 | 82.0 mm (3.2 in) |
| 2020 | 67.0 mm (2.6 in) |
| 2021 | 69.0 mm (2.7 in) |
| 2022 | 83.8 mm (3.3 in) |
| 2023 | 73.7 mm (2.9 in) |
| 2024 | 90.2 mm (3.6 in) |
| 2025 | 86.1 mm (3.4 in) |
| 2026 | 73.5 mm (2.9 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1949 | 14 days |
| 1950 | 13 days |
| 1951 | 15 days |
| 1952 | 18 days |
| 1953 | 30 days |
| 1954 | 15 days |
| 1955 | 16 days |
| 1956 | 16 days |
| 1957 | 24 days |
| 1958 | 15 days |
| 1959 | 16 days |
| 1960 | 16 days |
| 1961 | 22 days |
| 1962 | 16 days |
| 1963 | 28 days |
| 1964 | 28 days |
| 1965 | 16 days |
| 1966 | 16 days |
| 1967 | 32 days |
| 1968 | 19 days |
| 1969 | 29 days |
| 1970 | 17 days |
| 1971 | 12 days |
| 1972 | 16 days |
| 1973 | 29 days |
| 1974 | 15 days |
| 1975 | 16 days |
| 1976 | 13 days |
| 1977 | 16 days |
| 1978 | 23 days |
| 1979 | 15 days |
| 1980 | 16 days |
| 1981 | 17 days |
| 1982 | 14 days |
| 1983 | 14 days |
| 1984 | 19 days |
| 1985 | 16 days |
| 1986 | 12 days |
| 1987 | 16 days |
| 1988 | 18 days |
| 1989 | 12 days |
| 1990 | 10 days |
| 1991 | 10 days |
| 1992 | 11 days |
| 1993 | 12 days |
| 1994 | 13 days |
| 1995 | 21 days |
| 1996 | 14 days |
| 1997 | 14 days |
| 1998 | 13 days |
| 1999 | 20 days |
| 2000 | 21 days |
| 2001 | 22 days |
| 2002 | 24 days |
| 2003 | 16 days |
| 2004 | 15 days |
| 2005 | 24 days |
| 2006 | 17 days |
| 2007 | 16 days |
| 2008 | 13 days |
| 2009 | 18 days |
| 2010 | 16 days |
| 2011 | 15 days |
| 2012 | 15 days |
| 2013 | 14 days |
| 2014 | 12 days |
| 2015 | 19 days |
| 2016 | 17 days |
| 2017 | 21 days |
| 2018 | 12 days |
| 2019 | 14 days |
| 2020 | 15 days |
| 2021 | 16 days |
| 2022 | 13 days |
| 2023 | 16 days |
| 2024 | 14 days |
| 2025 | 15 days |
| 2026 | 16 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
75 years with a frostAcross 75 years with a frost, the median last spring frost at Watertown AP falls on 13 May and the median first autumn frost on 27 September, which leaves a median of 140 days between them.
In 1996 to 2025 the median growing season was 145 days. That is 8 days more than in 1950 to 1979.
Fitted over all years, the growing season changes by +1.6 days per decade at this station.
| Measure | Median, all years | Earliest period (1950 to 1979) | Recent period (1996 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 13 May | 13 May | 13 May | no change | -0.5 days per decade |
| First autumn frost | 27 September | 26 September | 4 October | 8 days later | +1.1 days per decade |
| Growing days | 140 days | 137 days | 145 days | 8 days more | +1.6 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
75 years, 1950 to 2025A day with at least 47.7 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 98.8 mm (3.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 47.7 mm (1.9 in) | |
| 5 years | 62.2 mm (2.4 in) | |
| 10 years | 71.5 mm (2.8 in) | |
| 25 years | 82.8 mm (3.3 in) | |
| 50 years | 91.0 mm (3.6 in) | |
| 100 years | 98.8 mm (3.9 in) | Longer than the 75 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, 75 years of values from 1950 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: 103.9 mm (4.1 in) in 1981; 99.1 mm (3.9 in) in 2005; 93.2 mm (3.7 in) in 2017.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Watertown AP had a mean temperature of 8.2 C (46.8 F) and 969.6 mm (38.2 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Hart 3 WSW (United States, 834 km away), Ridgetown (Canada, 504 km away) and Welland (Canada, 284 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Hart 3 WSW | United States | 834 km (518 mi) | 8.1 C (46.7 F) | 914.0 mm (36.0 in) | 0.49 |
| Ridgetown | Canada | 504 km (313 mi) | 8.4 C (47.0 F) | 898.0 mm (35.4 in) | 0.51 |
| Welland | Canada | 284 km (176 mi) | 8.4 C (47.0 F) | 932.6 mm (36.7 in) | 0.52 |
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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-17).