Saint Joseph weather by month
Measured at St Joseph/Rosecrans Mem
Averages and records for each calendar month at St Joseph/Rosecrans Mem, United States, from 1948 to 2026. The warmest month is July, averaging 31.4°C; the coolest is January at 2.5°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 2.5°C | −8.8°C | 22.8°C8 January 2003 | −31.7°C12 January 1974 | 56 / 56 |
| February | 5.8°C | −6.3°C | 26.7°C26 February 2024 | −30.6°C1 February 1979 | 56 / 56 |
| March | 12.5°C | −0.4°C | 35.0°C21 March 2026 | −25.0°C4 March 1978 | 56 / 56 |
| April | 19.3°C | 6.0°C | 35.6°C28 April 1970 | −16.7°C3 April 1975 | 56 / 56 |
| May | 24.6°C | 11.9°C | 38.9°C26 May 2018 | −1.7°C3 May 2005 | 56 / 56 |
| June | 29.8°C | 17.7°C | 40.6°C27 June 1980 | 5.6°C1 June 1979 | 56 / 56 |
| July | 31.4°C | 19.7°C | 41.7°C13 July 1954 | 5.0°C5 July 1972 | 55 / 56 |
| August | 30.2°C | 17.9°C | 41.1°C25 August 2003 | 6.1°C20 August 1967 | 54 / 54 |
| September | 26.8°C | 13.0°C | 39.4°C28 September 1953 | −1.1°C28 September 1967 | 53 / 55 |
| October | 20.7°C | 6.2°C | 36.1°C10 October 1963 | −9.3°C18 October 2022 | 55 / 55 |
| November | 12.3°C | −0.2°C | 27.8°C2 November 1964 | −18.9°C29 November 1976 | 53 / 54 |
| December | 5.1°C | −5.9°C | 22.8°C15 December 2021 | −26.1°C11 December 1972 | 54 / 54 |
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 53 to 56 years each.
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Climate at nearby stations
The closest stations with twelve months of archive of their own, nearest first.
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.