Jacksonville climate by month
Averages and records for each calendar month at Jacksonville , United States, from 1945 to 2026. The warmest month is July, averaging 33.2°C; the coolest is January at 18.8°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 18.8°C | 7.9°C | 30.6°C23 January 1974 | −12.8°C21 January 1985 | 78 / 79 |
| February | 20.4°C | 9.5°C | 31.7°C24 February 1962 | −5.6°C5 February 1996 | 79 / 79 |
| March | 23.6°C | 12.4°C | 35.6°C28 March 2020 | −5.0°C3 March 1980 | 79 / 79 |
| April | 26.8°C | 15.8°C | 35.0°C27 April 1986 | 1.1°C5 April 1987 | 79 / 79 |
| May | 30.1°C | 19.7°C | 38.3°C27 May 2019 | 7.2°C9 May 1992 | 79 / 79 |
| June | 32.2°C | 22.7°C | 40.0°C19 June 1998 | 9.4°C1 June 1984 | 79 / 79 |
| July | 33.2°C | 23.8°C | 39.4°C1 July 1998 | 17.8°C23 July 1965 | 78 / 79 |
| August | 32.8°C | 23.9°C | 39.4°C14 August 1995 | 15.6°C23 August 1979 | 80 / 80 |
| September | 30.9°C | 22.7°C | 36.7°C10 September 1945 | 12.8°C30 September 1967 | 79 / 80 |
| October | 27.3°C | 18.1°C | 35.6°C2 October 1959 | 2.8°C21 October 1989 | 77 / 79 |
| November | 23.2°C | 13.0°C | 35.0°C12 November 2019 | −6.1°C25 November 1950 | 78 / 79 |
| December | 19.9°C | 9.3°C | 30.6°C15 December 1972 | −10.0°C13 December 1962 | 78 / 79 |
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 80 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.