Thermal Arpt climate by month
Averages and records for each calendar month at Thermal Arpt, United States, from 1950 to 2026. The warmest month is July, averaging 41.8°C; the coolest is December at 21.4°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 21.6°C | 3.7°C | 34.4°C31 January 2003 | −8.3°C5 January 1972 | 73 / 74 |
| February | 23.8°C | 5.9°C | 37.8°C27 February 1986 | −7.1°C3 February 2011 | 74 / 76 |
| March | 26.8°C | 9.3°C | 42.2°C19 March 2026 | −4.4°C4 March 2002 | 75 / 76 |
| April | 30.6°C | 13.0°C | 43.3°C8 April 1989 | 0.0°C10 April 1999 | 74 / 76 |
| May | 34.6°C | 17.2°C | 46.7°C28 May 1983 | 5.0°C15 May 1951 | 76 / 77 |
| June | 39.5°C | 20.9°C | 50.6°C20 June 2017 | 10.0°C5 June 2011 | 77 / 77 |
| July | 41.8°C | 24.7°C | 52.2°C28 July 1995 | 13.9°C6 July 1994 | 76 / 77 |
| August | 41.2°C | 24.3°C | 50.0°C4 August 2021 | 11.1°C21 August 1993 | 76 / 76 |
| September | 38.5°C | 20.5°C | 50.6°C1 September 1950 | 8.9°C25 September 1993 | 76 / 77 |
| October | 32.9°C | 14.1°C | 45.6°C2 October 1980 | −2.2°C30 October 1971 | 75 / 75 |
| November | 26.1°C | 7.1°C | 36.7°C1 November 1962 | −6.6°C26 November 2010 | 75 / 76 |
| December | 21.4°C | 3.2°C | 33.9°C3 December 1958 | −10.0°C23 December 1990 | 74 / 74 |
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 73 to 77 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.