Jacksonville Intl climate by month
Averages and records for each calendar month at Jacksonville Intl, United States, from 1938 to 2026. The warmest month is July, averaging 33.3°C; the coolest is January at 18.5°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 18.5°C | 5.8°C | 30.6°C30 January 2023 | −13.9°C21 January 1985 | 88 / 88 |
| February | 20.2°C | 7.4°C | 31.7°C13 February 2020 | −7.2°C15 February 1943 | 88 / 88 |
| March | 23.4°C | 10.3°C | 34.4°C28 March 2020 | −5.0°C3 March 1980 | 88 / 88 |
| April | 26.7°C | 13.6°C | 35.0°C21 April 1968 | −0.6°C8 April 2007 | 89 / 89 |
| May | 30.0°C | 17.7°C | 38.9°C22 May 1938 | 7.2°C4 May 1939 | 88 / 88 |
| June | 32.3°C | 21.3°C | 39.4°C27 June 1950 | 8.3°C1 June 1984 | 88 / 88 |
| July | 33.3°C | 22.7°C | 40.6°C21 July 1942 | 16.1°C8 July 1972 | 89 / 89 |
| August | 32.8°C | 22.7°C | 38.9°C12 August 1938 | 17.2°C29 August 1984 | 89 / 89 |
| September | 30.7°C | 21.2°C | 37.8°C4 September 1944 | 8.9°C19 September 1981 | 88 / 89 |
| October | 26.9°C | 16.0°C | 35.6°C9 October 1941 | 0.6°C29 October 2008 | 88 / 88 |
| November | 22.8°C | 10.5°C | 31.7°C1 November 2015 | −6.1°C25 November 1970 | 88 / 88 |
| December | 19.5°C | 7.1°C | 29.4°C28 December 2015 | −11.7°C25 December 1983 | 88 / 88 |
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 88 to 89 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.