Lackland AFB/Kelly Fld climate by month
Averages and records for each calendar month at Lackland AFB/Kelly Fld, United States, from 1949 to 2026. The warmest month is August, averaging 36.0°C; the coolest is January at 17.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 17.1°C | 5.1°C | 32.8°C2 January 2026 | −15.6°C31 January 1949 | 30 / 30 |
| February | 19.2°C | 7.2°C | 36.7°C26 February 2026 | −12.8°C2 February 1951 | 30 / 30 |
| March | 23.3°C | 11.0°C | 37.8°C26 March 1950 | −3.8°C12 March 2022 | 30 / 30 |
| April | 27.2°C | 15.8°C | 38.3°C19 April 1951 | 0.6°C16 April 1961 | 30 / 30 |
| May | 30.6°C | 19.7°C | 40.0°C25 May 2024 | 7.8°C8 May 1960 | 30 / 30 |
| June | 33.9°C | 22.9°C | 41.1°C4 June 2024 | 12.8°C3 June 1970 | 31 / 31 |
| July | 35.6°C | 24.0°C | 42.2°C26 July 1954 | 17.8°C31 July 1965 | 30 / 31 |
| August | 36.0°C | 23.9°C | 42.8°C21 August 2024 | 15.6°C24 August 1961 | 31 / 31 |
| September | 32.6°C | 21.4°C | 40.6°C8 September 2023 | 8.9°C30 September 2020 | 29 / 31 |
| October | 28.0°C | 15.9°C | 36.7°C13 October 2024 | 0.6°C31 October 2019 | 30 / 30 |
| November | 22.1°C | 10.1°C | 33.9°C13 November 1951 | −5.0°C18 November 1959 | 30 / 30 |
| December | 18.8°C | 6.7°C | 32.8°C30 December 2024 | −8.8°C23 December 2022 | 30 / 30 |
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 29 to 31 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.