Oakland climate
Oakland is warmest in September, with average highs of 26 °C, and coldest in January, when nights average 6.0 °C. February is the wettest month (102 mm) and July the driest (0.5 mm). Figures are 1991–2020 climate normals.
Across a full year Oakland averages 498 mm of rain, 87 days above 25 °C and 1 days below freezing.
United States · 13 m elevation · population 419,267 · 1991–2020 normals
Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month
- Warmest month September 26 °C
- Coldest month January 6.0 °C
- Driest month July 0 mm
- Wettest month February 102 mm
- Least cloud September 33 % cloud
- Hottest on record September 42 °C
- Coldest on record December -2.1 °C
What to expectOakland through the year
Oakland has a clear annual cycle: average daily highs run from 14 °C in January to 26 °C in September, a swing of 9.3 °C in mean temperature across the year.
Counted across a normal year, 87 days a year reach 25 °C, 22 of them reach 30 °C, 1 nights drop below freezing. The warmest reading in the 1991–2020 record is 42 °C, in September.
Rain is strongly seasonal. February averages 102 mm against 0 mm in July — 222 times as much. Planning around the dry months matters more here than planning around temperature.
Month by month
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 14.4 °C | 98 mm | 63 % |
| February | 15.7 °C | 102 mm | 61 % |
| March | 17.4 °C | 78 mm | 58 % |
| April | 19.3 °C | 37 mm | 49 % |
| May | 21.8 °C | 19 mm | 45 % |
| June | 24.8 °C | 3 mm | 35 % |
| July | 25.7 °C | under 1 mm | 38 % |
| August | 26.1 °C | 1 mm | 39 % |
| September | 26.4 °C | 2 mm | 33 % |
| October | 23.6 °C | 21 mm | 39 % |
| November | 18.0 °C | 47 mm | 51 % |
| December | 14.1 °C | 89 mm | 58 % |
Temperature month by month
| Month | Avg high | Avg low | Mean | Record high | Record low | Days above 25 °C | Days above 30 °C | Days below 0 °C |
|---|---|---|---|---|---|---|---|---|
| January | 14.4 °C | 6.0 °C | 9.6 °C | 22.0 °C | -1.8 °C | 0 | 0 | 1 |
| February | 15.7 °C | 6.9 °C | 10.6 °C | 24.6 °C | -0.3 °C | 0 | 0 | 0 |
| March | 17.4 °C | 8.1 °C | 12.0 °C | 27.3 °C | 1.1 °C | 1 | 0 | 0 |
| April | 19.3 °C | 9.0 °C | 13.3 °C | 33.7 °C | 2.0 °C | 3 | 0 | 0 |
| May | 21.8 °C | 10.9 °C | 15.5 °C | 36.9 °C | 5.8 °C | 6 | 1 | 0 |
| June | 24.8 °C | 12.6 °C | 17.7 °C | 40.4 °C | 7.8 °C | 13 | 4 | 0 |
| July | 25.7 °C | 13.7 °C | 18.6 °C | 39.4 °C | 9.9 °C | 17 | 3 | 0 |
| August | 26.1 °C | 14.1 °C | 18.8 °C | 38.2 °C | 11.0 °C | 18 | 4 | 0 |
| September | 26.4 °C | 13.8 °C | 18.8 °C | 42.3 °C | 9.2 °C | 17 | 6 | 0 |
| October | 23.6 °C | 12.2 °C | 16.8 °C | 37.0 °C | 6.5 °C | 11 | 2 | 0 |
| November | 18.0 °C | 8.8 °C | 12.7 °C | 29.3 °C | 1.0 °C | 1 | 0 | 0 |
| December | 14.1 °C | 6.3 °C | 9.7 °C | 21.1 °C | -2.1 °C | 0 | 0 | 0 |
Rain, sun and wind month by month
| Month | Rainfall | Wet days | Daylight | Cloud cover | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 98 mm | 9 | 9.8 h/day | 63 % | 81 % | 14 km/h |
| February | 102 mm | 9 | 11 h/day | 61 % | 79 % | 16 km/h |
| March | 78 mm | 9 | 12 h/day | 58 % | 77 % | 17 km/h |
| April | 37 mm | 5 | 13 h/day | 49 % | 72 % | 19 km/h |
| May | 19 mm | 3 | 14 h/day | 45 % | 70 % | 20 km/h |
| June | 3 mm | 1 | 15 h/day | 35 % | 67 % | 19 km/h |
| July | under 1 mm | 0 | 15 h/day | 38 % | 71 % | 18 km/h |
| August | 1 mm | 0 | 14 h/day | 39 % | 72 % | 17 km/h |
| September | 2 mm | 1 | 12 h/day | 33 % | 69 % | 16 km/h |
| October | 21 mm | 3 | 11 h/day | 39 % | 68 % | 15 km/h |
| November | 47 mm | 6 | 10 h/day | 51 % | 75 % | 14 km/h |
| December | 89 mm | 9 | 9.6 h/day | 58 % | 78 % | 15 km/h |
Where Oakland ranks
| Ranking | Position | Value |
|---|---|---|
| The driest places in North America in September | 6th of 50 | 1.9 mm |
| Places with the best weather in North America in October | 7th of 50 | 96/100 |
| The driest places in North America in July | 7th of 50 | 0.5 mm |
| Places with the best weather in North America in August | 13th of 50 | 89/100 |
| The driest places in North America in August | 14th of 50 | 0.9 mm |
| Places with the best weather in North America in July | 15th of 50 | 90/100 |
Planning a trip? See the best time to visit Oakland.
QuestionsCommon questions about Oakland’s climate
When is the best time to visit Oakland?
That depends on what you want, so the honest answer is a comparison rather than a single month. July, August, September sit closest to 20 °C on average, September is the warmest month and July the driest. The month-by-month table above has the full picture.
How hot does Oakland get?
In September, the warmest month, daily highs average 26 °C. About 22 days a year pass 30 °C. The highest value in the 1991–2020 record is 42 °C.
How cold does it get in winter?
Nights average 6.0 °C in January, the coldest month. A normal year has 1 nights below freezing.
Which month is wettest in Oakland?
February, averaging 102 mm over 9 days with rain. The driest month is July with 0 mm. The year as a whole averages 498 mm.
Are these figures a forecast?
No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Oakland rather than what any particular week will bring. Individual years can differ substantially from the normal.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Data point
- 37.804°, -122.271° , 13 m above sea level (the coordinates the reanalysis values are taken for)
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.