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Weather in Lewisville, TX · National Weather Service + NOAA

Lewisville has hot summers

Lewisville has mild winters and hot summers. A typical July afternoon reaches 96°, a January night drops to 35°, and snow is almost unheard of. A typical November afternoon reaches 67°, and nights fall to 45°.

Winter 58°/37°Spring 76°/54°Summer 94°/73°Fall 78°/56°
Right now
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Sunrise 7:48 am · sunset 6:34 pm

Getting the latest forecast from the National Weather Service…

What stands out about Lewisville’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
Hot summersJuly afternoons average 96°, hotter than 97% of U.S. towns.Snow is rareAbout 0.1 inches in a normal year, so most winters see none.Plenty of 90° daysAbout 104 days a year reach 90°.Air-conditioning countryMore cooling degree days than 94% of U.S. towns.
A normal year

Where today sits in Lewisville’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
58° / 37°
Snow is rare
Spring
76° / 54°
Last frost around Mar 14
Summer
94° / 73°
104 days reach 90° in a normal year
Fall now
78° / 56°
First frost around Nov 17
13 daysuntil the usual first frost (Nov 17)
Best months to be outside
MarAprMayOctNov
Highs of 62–84° and lows of 40° or more
How much snow does Lewisville get?Almost none.When is it wettest?May, with 4.7 inches.Is it warmer than it used to be?+0.9° vs. the 20th century.

Weather talk

Road reports, first frosts and storm memories from neighbors in Lewisville.

Town Square →
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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Lewisville itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Lewisville Dam, TX (2 mi, snow) and Grapevine Dam, TX (8 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.