Rolla weather by month
Measured at Vichy/Rolla Arpt
Averages and records for each calendar month at Vichy/Rolla Arpt, United States, from 1948 to 2026. The warmest month is July, averaging 31.0°C; the coolest is January at 4.4°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 4.4°C | −5.9°C | 24.4°C24 January 1950 | −26.7°C10 January 1982 | 72 / 72 |
| February | 7.5°C | −3.6°C | 27.8°C29 February 1972 | −24.4°C3 February 1996 | 72 / 72 |
| March | 13.0°C | 1.2°C | 32.8°C26 March 2026 | −21.7°C5 March 1960 | 71 / 71 |
| April | 19.4°C | 7.2°C | 33.9°C22 April 1965 | −7.8°C8 April 2007 | 71 / 71 |
| May | 23.9°C | 12.5°C | 36.7°C26 May 2012 | −1.1°C3 May 1976 | 71 / 71 |
| June | 28.5°C | 17.4°C | 41.1°C28 June 2012 | 6.1°C6 June 2000 | 71 / 71 |
| July | 31.0°C | 19.7°C | 45.0°C18 July 1954 | 8.9°C27 July 2004 | 72 / 72 |
| August | 30.3°C | 18.8°C | 41.7°C15 August 2007 | 7.2°C12 August 2004 | 72 / 72 |
| September | 26.3°C | 14.5°C | 38.9°C29 September 1953 | 1.1°C22 September 1995 | 71 / 72 |
| October | 20.3°C | 8.4°C | 33.9°C10 October 1963 | −6.6°C19 October 2022 | 70 / 70 |
| November | 12.8°C | 1.9°C | 29.4°C13 November 1955 | −16.1°C17 November 1959 | 70 / 71 |
| December | 7.0°C | −3.0°C | 25.0°C8 December 1991 | −23.9°C12 December 1962 | 70 / 71 |
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 70 to 72 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.