San Jose averages 19.1 days a year above 90°F, with February the wettest month at 3.24 in of normal rain. The hottest day on record was 109°F on Jun 14, 2000; the coldest, 19°F on Dec 22, 1990. The single biggest 24-hour rain event recorded was 2.42 in on Nov 29, 1970.
Climate and Average Weather Year Round in San Jose
Year-round temperature
In San Jose, the warmest months are June through September, with average daily highs between 80°F and 83°F. The coldest stretch runs December through February, with highs between 59°F and 63°F and overnight lows reaching 43°F.
Rainfall through the year
Rainfall in San Jose averages 1.3 in per month over the long run. February is the wettest at 3.2 in, while July is the driest at 0.0 in.
Days at 90 °F or hotter
San Jose averages 19.1 days per year at 90 °F or hotter. The hottest year on record saw 43 such days (1996); the coolest just 5 (2005).
Precipitation this year
As of May 29, San Jose has received 7.2 in of precipitation this year — 32% below the long-term normal for this point in the year (10.6 in).