Dallas averages 104.6 days a year above 90°F, with October the wettest month at 4.79 in of normal rain. The hottest day on record was 112°F on Jun 26, 1980; the coldest, 1°F on Dec 23, 1989. The single biggest 24-hour rain event recorded was 6.9 in on Mar 19, 2006.
Climate and Average Weather Year Round in Dallas
Year-round temperature
In Dallas, the warmest months are June through September, with average daily highs between 90°F and 97°F. The coldest stretch runs December through February, with highs between 58°F and 62°F and overnight lows reaching 38°F.
Rainfall through the year
Rainfall in Dallas averages 3.2 in per month over the long run. October is the wettest at 4.8 in, while July is the driest at 1.7 in.
Days at 90 °F or hotter
Dallas averages 104.6 days per year at 90 °F or hotter. The hottest year on record saw 131 such days (1998); the coolest just 10 (2026).
Precipitation this year
As of May 28, Dallas has received 16.4 in of precipitation this year — 2% above the long-term normal for this point in the year (16.1 in).