Massena Intl climate by month
Averages and records for each calendar month at Massena Intl, United States, from 1948 to 2026. The warmest month is July, averaging 27.1°C; the coolest is January at −3.9°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −3.9°C | −14.5°C | 19.4°C15 January 1995 | −42.2°C15 January 1957 | 77 / 78 |
| February | −2.5°C | −13.6°C | 20.6°C27 February 2024 | −38.9°C7 February 1993 | 77 / 78 |
| March | 3.2°C | −7.1°C | 28.9°C31 March 1998 | −32.2°C2 March 1980 | 78 / 78 |
| April | 11.9°C | 0.5°C | 31.7°C27 April 1990 | −14.4°C3 April 1954 | 78 / 78 |
| May | 19.5°C | 6.7°C | 35.6°C26 May 2010 | −6.7°C5 May 1974 | 78 / 78 |
| June | 24.4°C | 11.9°C | 36.1°C18 June 1994 | −0.6°C3 June 1986 | 78 / 78 |
| July | 27.1°C | 14.6°C | 37.2°C10 July 2020 | 3.3°C2 July 1978 | 77 / 78 |
| August | 25.7°C | 13.3°C | 37.8°C1 August 1975 | 1.7°C31 August 1965 | 78 / 78 |
| September | 21.1°C | 8.8°C | 35.0°C4 September 1953 | −4.4°C28 September 1956 | 78 / 79 |
| October | 14.2°C | 3.1°C | 30.6°C4 October 2023 | −9.4°C30 October 1967 | 78 / 78 |
| November | 6.6°C | −2.3°C | 25.6°C6 November 1948 | −22.7°C23 November 2018 | 78 / 78 |
| December | −0.8°C | −10.0°C | 20.0°C6 December 2001 | −36.1°C22 December 1970 | 78 / 78 |
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 77 to 78 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.