Monterey Rgnl climate by month
Averages and records for each calendar month at Monterey Rgnl, United States, from 1968 to 2026. The warmest month is September, averaging 21.1°C; the coolest is December at 15.7°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 16.0°C | 6.1°C | 28.9°C17 January 2014 | −3.8°C13 January 2007 | 37 / 37 |
| February | 16.1°C | 6.9°C | 30.0°C27 February 2025 | 0.6°C26 February 1971 | 35 / 37 |
| March | 16.4°C | 7.8°C | 31.7°C17 March 2026 | 1.1°C2 March 1971 | 35 / 37 |
| April | 16.6°C | 8.5°C | 33.3°C30 April 2014 | 1.1°C10 April 2008 | 37 / 37 |
| May | 17.7°C | 10.1°C | 30.6°C2 May 2013 | 4.4°C13 May 2000 | 36 / 37 |
| June | 19.4°C | 11.5°C | 35.6°C10 June 2019 | 5.6°C20 June 1976 | 36 / 37 |
| July | 19.8°C | 12.5°C | 31.1°C18 July 1971 | 7.8°C24 July 1970 | 36 / 37 |
| August | 20.3°C | 12.9°C | 33.3°C28 August 2009 | 7.8°C27 August 2009 | 35 / 37 |
| September | 21.1°C | 12.3°C | 39.4°C1 September 2017 | 5.6°C14 September 1970 | 33 / 36 |
| October | 20.2°C | 10.5°C | 35.6°C24 October 2017 | 1.1°C29 October 1971 | 35 / 35 |
| November | 17.9°C | 8.0°C | 31.1°C15 November 2008 | 0.6°C23 November 2003 | 35 / 36 |
| December | 15.7°C | 6.1°C | 27.8°C8 December 2020 | −3.3°C10 December 1972 | 34 / 36 |
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 33 to 37 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.