Phoenix, Phoenix Sky Harbor International Airport climate by month
Averages and records for each calendar month at Phoenix, Phoenix Sky Harbor International Airport, United States, from 1933 to 2026. The warmest month is July, averaging 41.1°C; the coolest is January at 19.2°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 19.2°C | 5.7°C | 31.1°C19 January 1971 | −8.3°C5 January 1950 | 88 / 88 |
| February | 21.4°C | 7.4°C | 33.3°C27 February 1986 | −5.6°C12 February 1948 | 90 / 90 |
| March | 24.8°C | 10.1°C | 40.6°C19 March 2026 | −3.9°C4 March 1966 | 89 / 89 |
| April | 29.5°C | 13.8°C | 40.6°C20 April 1989 | 1.1°C10 April 1935 | 88 / 88 |
| May | 34.4°C | 18.4°C | 45.0°C26 May 1951 | 4.4°C8 May 1965 | 89 / 89 |
| June | 39.8°C | 23.4°C | 50.0°C26 June 1990 | 10.0°C17 June 1944 | 89 / 89 |
| July | 41.1°C | 27.5°C | 49.4°C28 July 1995 | 16.1°C2 July 1941 | 88 / 88 |
| August | 40.0°C | 26.8°C | 47.8°C7 August 2025 | 15.6°C18 August 1938 | 88 / 88 |
| September | 37.5°C | 23.3°C | 47.8°C1 September 1950 | 8.3°C20 September 1965 | 87 / 88 |
| October | 31.5°C | 16.6°C | 45.0°C1 October 2024 | 1.1°C30 October 1971 | 86 / 86 |
| November | 24.3°C | 9.7°C | 37.2°C5 November 2020 | −3.9°C25 November 1938 | 87 / 87 |
| December | 19.4°C | 5.9°C | 31.1°C10 December 1950 | −5.6°C5 December 1948 | 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 86 to 90 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.