Grand Prairie averages 73.6 days a year above 90°F, with October the wettest month at 4.96 in of normal rain. Across decades of records, Mondays are 15% rainier than the weekly average. The hottest day on record was 112°F on Sep 5, 2000; the coldest, 0°F on Mar 1, 2004. The single biggest 24-hour rain event recorded was 12.05 in on Jul 29, 2004.
Climate and Average Weather Year Round in Grand Prairie
Year-round temperature
In Grand Prairie, 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 33°F.
Rainfall through the year
Rainfall in Grand Prairie averages 3.4 in per month over the long run. October is the wettest at 5.0 in, while July is the driest at 2.3 in.
Days at 90 °F or hotter
Grand Prairie averages 73.6 days per year at 90 °F or hotter. The hottest year on record saw 119 such days (1998); the coolest just 1 (2024).
Precipitation this year
As of May 28, Grand Prairie has received 7.3 in of precipitation this year — 58% below the long-term normal for this point in the year (17.4 in).