Mesa weather by month
Measured at Phoenix/Mesa Gateway Arpt
Averages and records for each calendar month at Phoenix/Mesa Gateway Arpt, United States, from 1949 to 2026. The warmest month is July, averaging 39.3°C; the coolest is January at 18.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 18.1°C | 3.7°C | 28.9°C25 January 1951 | −6.7°C5 January 1950 | 17 / 17 |
| February | 20.6°C | 5.4°C | 37.0°C25 February 2025 | −4.4°C20 February 1953 | 16 / 16 |
| March | 23.8°C | 8.4°C | 39.0°C19 March 2026 | −1.7°C4 March 1965 | 16 / 16 |
| April | 28.3°C | 12.4°C | 37.2°C21 April 1958 | 1.7°C12 April 1953 | 16 / 16 |
| May | 33.1°C | 16.6°C | 43.3°C26 May 1951 | 4.4°C8 May 1965 | 17 / 17 |
| June | 38.3°C | 21.7°C | 45.6°C8 June 1955 | 11.7°C2 June 1955 | 17 / 17 |
| July | 39.3°C | 26.0°C | 46.7°C9 July 1958 | 19.4°C1 July 1955 | 17 / 17 |
| August | 38.2°C | 25.0°C | 46.0°C7 August 2025 | 17.2°C31 August 1956 | 17 / 17 |
| September | 36.5°C | 21.4°C | 45.0°C1 September 1950 | 10.0°C21 September 1965 | 16 / 17 |
| October | 31.1°C | 15.4°C | 39.4°C1 October 1953 | 2.2°C20 October 1949 | 15 / 15 |
| November | 23.8°C | 8.2°C | 33.3°C12 November 1953 | −5.6°C20 November 1956 | 15 / 15 |
| December | 19.6°C | 4.2°C | 28.9°C24 December 1955 | −5.0°C28 December 1954 | 15 / 15 |
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 15 to 17 years each.
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Climate at nearby stations
The closest stations with twelve months of archive of their own, nearest first.
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.