Oakland, CA Climate & Monthly Averages
Oakland has an oceanic climate. September is the hottest month, averaging 77° by day; December is the coldest at 58°.
To understand Oakland, start with the wet season
Oakland's year is organised around rain rather than temperature. 58% of its 24.5 inches (622 mm) annual total arrives in the December to January window, while August averages less than 1 mm. Temperatures move far less: 77°F (25°C) at the year's warmest against 58°F (14°C) at its coolest.
Where the rain falls in the calendar
June is the brightest month at 13.3 hours of sun a day, against an annual average of 10.4 - sunnier than roughly 78% of the cities we track. December bottoms out at 58°F (14°C) in daylight, 44°F (7°C) after dark. Warmth peaks in September: highs of 77°F (25°C), lows of 57°F (14°C). Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 110°F (43°C) and the lowest daily minimum 32°F (0°C).
Between the average September and the average December lie 8°C, a narrower spread than about 79% of the cities we track.
4 months average under 20 mm of rain, the longest unbroken stretch running June through September. Seven of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is April through October. Snowfall is rare but not unheard of.
More climate facts for Oakland
- Hottest month: September - highs near 77°F (25°C)
- Coldest month: December - highs near 58°F (14°C)
- Decade extremes (2015-2024): 110°F (43°C) high · 32°F (0°C) low
- Wettest month: January (11 rainy days) · Sunniest: June (13.3 h sun/day)
- Climate type: oceanic
- Annual swing: 8°C between the average warmest and coolest month · day to night: 9°C
- Average humidity: 75%
Follow the rain through Oakland's year
Each card shows the average high and low. The bar places that month between Oakland's coldest night and warmest afternoon.
January
- Rain
- 11 days
- Sunshine
- 6.9 h
- Daylight
- 9.8 h
February
- Rain
- 8 days
- Sunshine
- 8.8 h
- Daylight
- 10.7 h
March
- Rain
- 10 days
- Sunshine
- 9.3 h
- Daylight
- 11.8 h
April
- Rain
- 5 days
- Sunshine
- 11.3 h
- Daylight
- 13.1 h
May
- Rain
- 3 days
- Sunshine
- 12.7 h
- Daylight
- 14.2 h
June
- Rain
- 0 days
- Sunshine
- 13.3 h
- Daylight
- 14.8 h
July
- Rain
- 0 days
- Sunshine
- 13.2 h
- Daylight
- 14.5 h
August
- Rain
- 0 days
- Sunshine
- 12.4 h
- Daylight
- 13.6 h
September
- Rain
- 1 day
- Sunshine
- 11.4 h
- Daylight
- 12.4 h
October
- Rain
- 3 days
- Sunshine
- 9.8 h
- Daylight
- 11.1 h
November
- Rain
- 6 days
- Sunshine
- 8.4 h
- Daylight
- 10.1 h
December
- Rain
- 11 days
- Sunshine
- 6.8 h
- Daylight
- 9.6 h
Looking for warmer alternatives? Browse warm places by month, or compare Oakland's coolest part of the year: December, January, February.
Working around Oakland's rain pattern
Choose dates by rain, not just temperature
The best time to visit Oakland is generally April to August and February, when the rains have stopped and the heat has not yet peaked. Daytime temperatures in that window sit near 69°F (21°C), with rain on about 3 days a month. For the same question asked the other way round, see where else is warm in April.
What to pack
Pack for Oakland with rain gear if you travel around January. Note the gap between afternoon and night: September pairs 77°F (25°C) with 57°F (14°C).
How Oakland compares for rain and warmth
- 58% of the year's precipitation falls in its wettest three months - more seasonal than 89% of the 3496 cities we track.
- Rain or snow reaches the ground on 59 days a year - fewer wet days than all but 12% of the 3496 cities we track.
These comparisons use the same ten-year window for every city in the dataset.
Monthly temperature and rain table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 58° | 45° | 11 | 5.2 in | 6.9 h/day | 9.8 h | 36% | 81% |
| February | 61° | 45° | 8 | 4.0 in | 8.8 h/day | 10.7 h | 28% | 74% |
| March | 62° | 46° | 10 | 4.3 in | 9.3 h/day | 11.8 h | 32% | 77% |
| April | 65° | 49° | 5 | 1.4 in | 11.3 h/day | 13.1 h | 17% | 76% |
| May | 68° | 51° | 3 | 0.9 in | 12.7 h/day | 14.2 h | 8% | 76% |
| June | 73° | 55° | 0 | 0.1 in | 13.3 h/day | 14.8 h | 1% | 73% |
| July | 74° | 56° | 0 | 0.0 in | 13.2 h/day | 14.5 h | 1% | 77% |
| August | 75° | 57° | 0 | 0.0 in | 12.4 h/day | 13.6 h | 1% | 78% |
| September | 77° | 57° | 1 | 0.2 in | 11.4 h/day | 12.4 h | 5% | 73% |
| October | 74° | 55° | 3 | 1.2 in | 9.8 h/day | 11.1 h | 10% | 67% |
| November | 64° | 47° | 6 | 2.3 in | 8.4 h/day | 10.1 h | 21% | 72% |
| December | 58° | 44° | 11 | 4.9 in | 6.8 h/day | 9.6 h | 35% | 79% |
The wet and quieter seasons in Oakland
Spring (March through May)
Spring is crisp but comfortable here - highs near 65°F (18°C), nights near 49°F (9°C), and rain comes on about 18 days over the three months. Daylight is generous - around 11.1 hours of sun a day.
Summer (June through August)
Through summer, Oakland brings comfortable warmth: 74°F (23°C) by day, 56°F (13°C) after dark, and precipitation is essentially absent. Daylight is generous - around 13.0 hours of sun a day.
Fall (September through November)
Through fall, Oakland is pleasantly warm: 72°F (22°C) by day, 53°F (12°C) after dark, and rain comes on about 11 days over the three months.
Winter (December through February)
Winter is crisp but comfortable here - highs near 59°F (15°C), nights near 44°F (7°C), and expect showers on roughly 30 days across the season.
Rain and seasonal questions about Oakland
What should I wear in Oakland?
When is the rainy season in Oakland?
How often does it rain in Oakland?
How cold does Oakland get in winter?
How humid does Oakland get?
Which months are driest in Oakland?
Oakland temperature extremes in the 2015–2024 dataset
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need another precipitation unit? Use the rainfall converter.