Oakland weather by month
Measured at Concord/Buchanan Fld
Averages and records for each calendar month at Concord/Buchanan Fld, United States, from 1999 to 2026. The warmest month is July, averaging 31.2°C; the coolest is December at 14.4°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 14.7°C | 4.7°C | 25.6°C18 January 2021 | −4.4°C13 January 2007 | 27 / 27 |
| February | 16.9°C | 5.7°C | 27.2°C9 February 2018 | −1.7°C26 February 2011 | 27 / 27 |
| March | 19.4°C | 7.5°C | 31.7°C20 March 2026 | 0.6°C8 March 2002 | 27 / 27 |
| April | 21.7°C | 9.0°C | 34.4°C26 April 2004 | 2.2°C24 April 2008 | 27 / 27 |
| May | 25.5°C | 11.5°C | 40.6°C31 May 2001 | 4.4°C11 May 2010 | 27 / 27 |
| June | 29.3°C | 13.7°C | 42.8°C14 June 2000 | 8.3°C3 June 2011 | 28 / 28 |
| July | 31.2°C | 14.6°C | 44.4°C22 July 2006 | 9.4°C18 July 1999 | 28 / 28 |
| August | 31.0°C | 14.9°C | 41.7°C27 August 2017 | 10.6°C20 August 2002 | 28 / 28 |
| September | 29.6°C | 14.0°C | 44.4°C7 September 2020 | 7.2°C29 September 2007 | 27 / 28 |
| October | 25.4°C | 11.1°C | 39.4°C1 October 2024 | 3.9°C31 October 2019 | 27 / 27 |
| November | 18.8°C | 6.9°C | 30.6°C3 November 2018 | −1.7°C30 November 2004 | 27 / 27 |
| December | 14.4°C | 4.8°C | 23.9°C2 December 2011 | −4.3°C10 December 2013 | 27 / 27 |
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 27 to 28 years each.
See what Concord/Buchanan Fld is doing right now
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.