St Johns Ind Arpt climate by month
Averages and records for each calendar month at St Johns Ind Arpt, United States, from 1999 to 2026. The warmest month is July, averaging 33.1°C; the coolest is January at 10.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 10.1°C | −6.9°C | 25.6°C7 January 2003 | −29.9°C1 January 2011 | 25 / 25 |
| February | 13.0°C | −4.7°C | 25.0°C17 February 2016 | −23.2°C3 February 2011 | 24 / 25 |
| March | 17.6°C | −1.5°C | 32.8°C21 March 2026 | −18.8°C13 March 2006 | 25 / 25 |
| April | 21.7°C | 2.4°C | 31.1°C28 April 2007 | −8.2°C11 April 2011 | 25 / 25 |
| May | 26.7°C | 7.2°C | 37.2°C20 May 2005 | −5.5°C3 May 2011 | 25 / 26 |
| June | 32.9°C | 12.6°C | 40.0°C20 June 2016 | 0.0°C9 June 2020 | 25 / 26 |
| July | 33.1°C | 16.7°C | 41.7°C18 July 2005 | 8.3°C3 July 2026 | 25 / 25 |
| August | 31.5°C | 15.4°C | 38.3°C10 August 2003 | 7.2°C25 August 2002 | 25 / 25 |
| September | 28.6°C | 10.8°C | 36.7°C6 September 2020 | −2.1°C28 September 2013 | 24 / 25 |
| October | 22.5°C | 3.6°C | 33.3°C1 October 2003 | −14.3°C31 October 2019 | 24 / 24 |
| November | 16.1°C | −2.7°C | 27.8°C10 November 2005 | −18.8°C30 November 2006 | 24 / 24 |
| December | 10.1°C | −6.6°C | 22.2°C1 December 2003 | −21.1°C13 December 2001 | 25 / 25 |
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 24 to 25 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.