Oceanside averages 2 days a year above 90°F, with February the wettest month at 2.36 in of normal rain. The hottest day on record was 104°F on Sep 27, 1970; the coldest, 28°F on Feb 8, 1974. The single biggest 24-hour rain event recorded was 4.21 in on Mar 15, 2023.
Climate and Average Weather Year Round in Oceanside
Year-round temperature
In Oceanside, the warmest months are July through October, with average daily highs between 70°F and 71°F. The coldest stretch runs January through March, with highs between 62°F and 63°F and overnight lows reaching 47°F.
Rainfall through the year
Rainfall in Oceanside averages 0.9 in per month over the long run. February is the wettest at 2.4 in, while August is the driest at 0.0 in.
Days at 90 °F or hotter
Oceanside averages 2.0 days per year at 90 °F or hotter. The hottest year on record saw 4 such days (1975); the coolest just 1 (1977).
Precipitation this year
As of May 29, Oceanside has received 4.0 in of precipitation this year — 43% below the long-term normal for this point in the year (7.1 in).