Columbia averages 90.6 days a year above 90°F, with June the wettest month at 5.41 in of normal rain. The hottest day on record was 113°F on Jun 29, 2012; the coldest, 1°F on Jan 21, 1985. The single biggest 24-hour rain event recorded was 6.04 in on Sep 26, 2024.
Climate and Average Weather Year Round in Columbia
Year-round temperature
In Columbia, the warmest months are June through September, with average daily highs between 89°F and 96°F. The coldest stretch runs December through February, with highs between 60°F and 64°F and overnight lows reaching 37°F.
Rainfall through the year
Rainfall in Columbia averages 4.0 in per month over the long run. June is the wettest at 5.4 in, while April is the driest at 2.9 in.
Days at 90 °F or hotter
Columbia averages 90.6 days per year at 90 °F or hotter. The hottest year on record saw 135 such days (2010); the coolest just 22 (2026).
Precipitation this year
As of May 29, Columbia has received 11.3 in of precipitation this year — 37% below the long-term normal for this point in the year (17.8 in).