Lewisville, TX Weather & Climate Normals
Lewisville's real weather, in one number
Lewisville, TX scores 52/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 5 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Lewisville's hottest and coldest months
Lewisville's hottest month is Aug, averaging 85°F; its coldest is Jan, averaging 45°F, a 39.9°F swing across the year, a middling gap by national standards.
Lewisville's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 56°F | 34°F | 2.62in | 0in |
| Feb | 60°F | 38°F | 2.73in | 0.1in |
| Mar | 68°F | 45°F | 3.59in | 0in |
| Apr | 75°F | 54°F | 3.53in | 0in |
| May | 83°F | 63°F | 4.73in | 0in |
| Jun | 91°F | 71°F | 3.75in | 0in |
| Jul | 95°F | 74°F | 2.25in | 0in |
| Aug | 96°F | 74°F | 2.09in | 0in |
| Sep | 89°F | 67°F | 3.45in | 0in |
| Oct | 78°F | 55°F | 4.46in | 0in |
| Nov | 66°F | 45°F | 2.78in | 0in |
| Dec | 58°F | 36°F | 2.91in | 0in |
Mar, Apr, May, Oct, and Nov are the best time to see Lewisville at its mildest; the rest of the year, plan around Aug's heat and Jan's cold.
Rain and snow in Lewisville
Lewisville averages 38.89in of precipitation a year across roughly 91 days with measurable rain or snow, and 0.1in of snow a year.
Where Lewisville ranks
Lewisville ranks 1180 of 4876 US cities in this dataset for comfort score, and 192 of 384 within TX. About 135,983 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Grapevine Dam, TX US, 8.3 miles from Lewisville, not a prediction for any specific day.
More on how this is worked out
What a 30-year climate normal actually is · Why this uses the nearest NOAA station