Oklahoma City averages 71.5 days a year above 90°F, with May the wettest month at 5.31 in of normal rain. The hottest day on record was 113°F on Aug 3, 2012; the coldest, −14°F on Feb 16, 2021. The single biggest 24-hour rain event recorded was 7.62 in on Jun 14, 2010.
Climate and Average Weather Year Round in Oklahoma City
Year-round temperature
In Oklahoma City, the warmest months are June through September, with average daily highs between 84°F and 93°F. The coldest stretch runs December through February, with highs between 49°F and 54°F and overnight lows reaching 27°F.
Rainfall through the year
Rainfall in Oklahoma City averages 3.0 in per month over the long run. May is the wettest at 5.3 in, while January is the driest at 1.3 in.
Days at 90 °F or hotter
Oklahoma City averages 71.5 days per year at 90 °F or hotter. The hottest year on record saw 113 such days (1998); the coolest just 9 (2026).
Precipitation this year
As of May 28, Oklahoma City has received 7.7 in of precipitation this year — 44% below the long-term normal for this point in the year (13.7 in).