Oakland averages 5.6 days a year above 90°F, with December the wettest month at 4.66 in of normal rain. The hottest day on record was 109°F on Sep 14, 1971; the coldest, 26°F on Dec 9, 1972. The single biggest 24-hour rain event recorded was 4.75 in on Dec 31, 2022.
Climate and Average Weather Year Round in Oakland
Year-round temperature
In Oakland, the warmest months are June, August, September, October, with average daily highs between 72°F and 75°F. The coldest stretch runs December through February, with highs between 60°F and 62°F and overnight lows reaching 45°F.
Rainfall through the year
Rainfall in Oakland averages 1.9 in per month over the long run. December is the wettest at 4.7 in, while July is the driest at 0.0 in.
Days at 90 °F or hotter
Oakland averages 5.6 days per year at 90 °F or hotter. The hottest year on record saw 14 such days (2020); the coolest just 1 (1994).
Precipitation this year
As of May 29, Oakland has received 10.8 in of precipitation this year — 23% below the long-term normal for this point in the year (14.0 in).