Columbus averages 78.2 days a year above 90°F, with March the wettest month at 4.92 in of normal rain. The hottest day on record was 106°F on Jun 30, 2012; the coldest, −2°F on Jan 21, 1985. The single biggest 24-hour rain event recorded was 5.92 in on Apr 19, 2020.
Climate and Average Weather Year Round in Columbus
Year-round temperature
In Columbus, the warmest months are June through September, with average daily highs between 87°F and 93°F. The coldest stretch runs December through February, with highs between 59°F and 63°F and overnight lows reaching 38°F.
Rainfall through the year
Rainfall in Columbus averages 4.1 in per month over the long run. March is the wettest at 4.9 in, while October is the driest at 2.8 in.
Days at 90 °F or hotter
Columbus averages 78.2 days per year at 90 °F or hotter. The hottest year on record saw 120 such days (2019); the coolest just 5 (2026).
Precipitation this year
As of May 28, Columbus has received 18.4 in of precipitation this year — 11% below the long-term normal for this point in the year (20.6 in).