Louisville averages 39.9 days a year above 90°F, with May the wettest month at 4.81 in of normal rain. The hottest day on record was 108°F on Jul 8, 2012; the coldest, −6°F on Feb 21, 2015. The single biggest 24-hour rain event recorded was 5.75 in on Sep 27, 2002.
Climate and Average Weather Year Round in Louisville
Year-round temperature
In Louisville, the warmest months are June through September, with average daily highs between 82°F and 89°F. The coldest stretch runs December through February, with highs between 43°F and 48°F and overnight lows reaching 26°F.
Rainfall through the year
Rainfall in Louisville averages 4.0 in per month over the long run. May is the wettest at 4.8 in, while August is the driest at 3.3 in.
Days at 90 °F or hotter
Louisville averages 39.9 days per year at 90 °F or hotter. The hottest year on record saw 60 such days (2019); the coolest just 1 (2026).
Precipitation this year
As of May 29, Louisville has received 19.7 in of precipitation this year — 5% below the long-term normal for this point in the year (20.8 in).