Watertown Rgnl climate by month
Averages and records for each calendar month at Watertown Rgnl, United States, from 1893 to 2026. The warmest month is July, averaging 28.5°C; the coolest is January at −6.0°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −6.0°C | −17.2°C | 18.3°C24 January 1981 | −40.0°C13 January 1916 | 131 / 132 |
| February | −3.5°C | −15.0°C | 18.9°C23 February 1958 | −38.9°C11 February 1899 | 131 / 131 |
| March | 3.6°C | −7.6°C | 27.8°C23 March 1910 | −32.8°C14 March 1897 | 131 / 131 |
| April | 12.7°C | −0.2°C | 35.0°C21 April 1980 | −23.3°C5 April 1926 | 130 / 131 |
| May | 19.9°C | 6.4°C | 41.1°C30 May 1934 | −8.9°C3 May 1907 | 130 / 130 |
| June | 25.2°C | 12.2°C | 41.7°C28 June 1931 | −3.9°C7 June 1897 | 129 / 130 |
| July | 28.5°C | 14.9°C | 43.3°C21 July 1934 | 1.7°C3 July 1917 | 129 / 129 |
| August | 27.4°C | 13.7°C | 40.6°C4 August 1934 | 0.0°C28 August 1965 | 127 / 129 |
| September | 22.2°C | 8.4°C | 40.0°C10 September 1931 | −12.8°C29 September 1899 | 127 / 130 |
| October | 14.7°C | 1.6°C | 32.8°C1 October 1951 | −18.9°C29 October 1925 | 127 / 129 |
| November | 4.5°C | −6.3°C | 25.6°C4 November 2020 | −28.9°C30 November 1964 | 127 / 129 |
| December | −3.1°C | −13.5°C | 20.6°C6 December 1939 | −38.2°C18 December 2016 | 130 / 130 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 127 to 131 years each.
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Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.