Omaha averages 34.9 days a year above 90°F, with May the wettest month at 4.66 in of normal rain. The hottest day on record was 110°F on Jul 21, 1974; the coldest, −23°F on Jan 10, 1982. The single biggest 24-hour rain event recorded was 6.46 in on Aug 7, 1999.
Climate and Average Weather Year Round in Omaha
Year-round temperature
In Omaha, the warmest months are June through September, with average daily highs between 79°F and 88°F. The coldest stretch runs December through February, with highs between 34°F and 39°F and overnight lows reaching 15°F.
Rainfall through the year
Rainfall in Omaha averages 2.7 in per month over the long run. May is the wettest at 4.7 in, while January is the driest at 0.8 in.
Days at 90 °F or hotter
Omaha averages 34.9 days per year at 90 °F or hotter. The hottest year on record saw 70 such days (2012); the coolest just 3 (2026).
Precipitation this year
As of May 28, Omaha has received 7.9 in of precipitation this year — 27% below the long-term normal for this point in the year (10.9 in).