Indianapolis averages 19.4 days a year above 90°F, with June the wettest month at 4.95 in of normal rain. The hottest day on record was 105°F on Jul 6, 2012; the coldest, −27°F on Jan 19, 1994. The single biggest 24-hour rain event recorded was 7.2 in on Sep 1, 2003.
Climate and Average Weather Year Round in Indianapolis
Year-round temperature
In Indianapolis, the warmest months are June through September, with average daily highs between 78°F and 85°F. The coldest stretch runs December through February, with highs between 36°F and 41°F and overnight lows reaching 21°F.
Rainfall through the year
Rainfall in Indianapolis averages 3.6 in per month over the long run. June is the wettest at 5.0 in, while February is the driest at 2.4 in.
Days at 90 °F or hotter
Indianapolis averages 19.4 days per year at 90 °F or hotter. The hottest year on record saw 51 such days (2012); the coolest just 3 (2014).
Precipitation this year
As of May 28, Indianapolis has received 19.9 in of precipitation this year — 11% above the long-term normal for this point in the year (17.9 in).