Irvine averages 11.5 days a year above 90°F, with February the wettest month at 2.64 in of normal rain. The hottest day on record was 110°F on Sep 27, 2010; the coldest, 33°F on Jan 14, 2007. The single biggest 24-hour rain event recorded was 3.24 in on Dec 6, 2018.
Climate and Average Weather Year Round in Irvine
Year-round temperature
In Irvine, the warmest months are July through October, with average daily highs between 77°F and 80°F. The coldest stretch runs December through February, with highs near 67°F and overnight lows reaching 48°F.
Rainfall through the year
Rainfall in Irvine averages 0.9 in per month over the long run. February is the wettest at 2.6 in, while June is the driest at 0.0 in.
Days at 90 °F or hotter
Irvine averages 11.5 days per year at 90 °F or hotter. The hottest year on record saw 28 such days (2020); the coolest just 2 (2001).
Precipitation this year
As of May 28, Irvine has received 3.8 in of precipitation this year — 51% below the long-term normal for this point in the year (7.6 in).