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Lewisville, TX Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Lewisville, TX?
Lewisville, TX gets 38.9 in of precipitation a year over about 90 rainy days. July is the warmest month (average high 96°F) and January the coldest (average low 33°F).
Humid subtropical climate
Lewisville, TX has hot summers and mild winters. Daytime highs range from about 57°F in January to 96°F in August. May is usually the wettest month, and snow falls in winter. The most comfortable time to visit is typically March to April and October to November, when daytime highs sit near 73°F.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 35° | 59° |
| Spring | Mar–May | 53° | 76° |
| Summer | Jun–Aug | 72° | 95° |
| Autumn | Sep–Nov | 54° | 78° |
How much rain does Lewisville get?
Lewisville gets 38.9 in of precipitation in an average year, spread over about 90 days with measurable rain. That is more rainy days than 51% of the US.
May is the wettest month, with 4.7 in. August is the driest, with 2.1 in. May has the most rainy days, about 10.
The longest dry spell in the last five years lasted 67 days, to August 10, 2022.
From September 2025 to August 2026 Lewisville got 39.6 in of rain, against a normal of 38.9 in for those months. June 2026 had the most, with 5.5 in.
See where Lewisville ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in Texas.
Does it snow in Lewisville?
Rarely. The reporting station for Lewisville averages under 0.5 in of snow a season.
The snowiest winter on record is 1977–78, with 17.6 in.
The most recent measurable snow at the station fell on January 25, 2026.
From September 2025 to August 2026 the station measured 2.4 in of snow, against a normal of 0.1 in for those months. January 2026 had the most, with 2.4 in.
See where Lewisville ranks: snowiest cities in the US.
Lewisville weather by month
Lewisville weather in January
In January, Lewisville averages a high of 57°F and a low of 33°F. It gets 2.6 in of precipitation over about 8 rainy days. Estimated sunshine is 52% of daylight hours, derived from ERA5 cloud cover. The January record high is 85°F (2006) and the record low is 6°F (1982).
Lewisville weather in February
In February, Lewisville averages a high of 61°F and a low of 37°F. It gets 2.7 in of precipitation over about 8 rainy days. Estimated sunshine is 47% of daylight hours, derived from ERA5 cloud cover. The February record high is 95°F (1996) and the record low is 4°F (1996).
Lewisville weather in March
In March, Lewisville averages a high of 68°F and a low of 45°F. It gets 3.6 in of precipitation over about 9 rainy days. Estimated sunshine is 45% of daylight hours, derived from ERA5 cloud cover. The March record high is 96°F (1991) and the record low is 13°F (1980). March is one of the most comfortable months to visit.
Lewisville weather in April
In April, Lewisville averages a high of 76°F and a low of 53°F. It gets 3.5 in of precipitation over about 8 rainy days. Estimated sunshine is 45% of daylight hours, derived from ERA5 cloud cover. The April record high is 101°F (2006) and the record low is 29°F (2003). April is one of the most comfortable months to visit.
Lewisville weather in May
In May, Lewisville averages a high of 84°F and a low of 62°F. It gets 4.7 in of precipitation over about 10 rainy days. Estimated sunshine is 39% of daylight hours, derived from ERA5 cloud cover. The May record high is 101°F (1985) and the record low is 37°F (2013).
Lewisville weather in June
In June, Lewisville averages a high of 92°F and a low of 70°F. It gets 3.8 in of precipitation over about 8 rainy days. Estimated sunshine is 55% of daylight hours, derived from ERA5 cloud cover. The June record high is 109°F (1980) and the record low is 50°F (1988).
Lewisville weather in July
In July, Lewisville averages a high of 96°F and a low of 74°F. It gets 2.3 in of precipitation over about 5 rainy days. Estimated sunshine is 61% of daylight hours, derived from ERA5 cloud cover. The July record high is 110°F (1998) and the record low is 49°F (2004).
Lewisville weather in August
In August, Lewisville averages a high of 96°F and a low of 73°F. It gets 2.1 in of precipitation over about 6 rainy days. Estimated sunshine is 64% of daylight hours, derived from ERA5 cloud cover. The August record high is 110°F (2011) and the record low is 55°F (1992).
Lewisville weather in September
In September, Lewisville averages a high of 89°F and a low of 66°F. It gets 3.5 in of precipitation over about 7 rainy days. Estimated sunshine is 66% of daylight hours, derived from ERA5 cloud cover. The September record high is 109°F (1998) and the record low is 38°F (1995).
Lewisville weather in October
In October, Lewisville averages a high of 79°F and a low of 54°F. It gets 4.5 in of precipitation over about 8 rainy days. Estimated sunshine is 68% of daylight hours, derived from ERA5 cloud cover. The October record high is 100°F (1977) and the record low is 22°F (1993). October is one of the most comfortable months to visit.
Lewisville weather in November
In November, Lewisville averages a high of 67°F and a low of 44°F. It gets 2.8 in of precipitation over about 7 rainy days. Estimated sunshine is 58% of daylight hours, derived from ERA5 cloud cover. The November record high is 93°F (2017) and the record low is 17°F (2014). November is one of the most comfortable months to visit.
Lewisville weather in December
In December, Lewisville averages a high of 58°F and a low of 35°F. It gets 2.9 in of precipitation over about 8 rainy days. Estimated sunshine is 53% of daylight hours, derived from ERA5 cloud cover. The December record high is 91°F (2005) and the record low is -1°F (1989).
Sunshine, humidity and wind in Lewisville
October is the sunniest month in Lewisville, with estimated sunshine of 68% of daylight hours from ERA5 cloud cover. May is the cloudiest, at 39%. The annual cloud-cover estimate is 54% of daylight hours; it is not a measurement of sunshine duration. Lewisville is sunnier than 72% of the US.
Humidity peaks in May at 68% and is lowest in August at 54%.
Lewisville has about 95 days a year above 90°F. Lewisville is hotter than 91% of the US.
See where Lewisville ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.
First and last freeze in Lewisville
The first fall freeze in Lewisville typically comes around November 14, and the last spring freeze around March 19. That leaves a frost-free growing season of about 240 days.
Lewisville weather records
These records cover GRAPEVINE DAM during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Lewisville station is 110°F, on July 13, 1998. The coldest is -1°F, on December 23, 1989.
The wettest day in the available station history brought 8.3 in of precipitation, on June 14, 1989.
43 all-time records have been set at the station since 1970.
The annual mean temperature has changed by +0.6°F per decade since 1970.
The best time to visit Lewisville
The most comfortable time to visit is typically March to April and October to November, when daytime highs sit near 73°F.
Winter (December–February) is mild, with average highs around 59°F and lows near 35°F. Snow is possible.
Spring (March–May) is warm, with average highs around 76°F and lows near 53°F.
Summer (June–August) is hot, with average highs around 95°F and lows near 72°F.
Autumn (September–November) is warm, with average highs around 78°F and lows near 54°F.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | 33° | 57° | 2.6 in | 8 | 62% | 52% | 85° | 6° |
| February | 37° | 61° | 2.7 in | 8 | 62% | 47% | 95° | 4° |
| March | 45° | 68° | 3.6 in | 9 | 61% | 45% | 96° | 13° |
| April | 53° | 76° | 3.5 in | 8 | 62% | 45% | 101° | 29° |
| May | 62° | 84° | 4.7 in | 10 | 68% | 39% | 101° | 37° |
| June | 70° | 92° | 3.8 in | 8 | 64% | 55% | 109° | 50° |
| July | 74° | 96° | 2.3 in | 5 | 58% | 61% | 110° | 49° |
| August | 73° | 96° | 2.1 in | 6 | 54% | 64% | 110° | 55° |
| September | 66° | 89° | 3.5 in | 7 | 59% | 66% | 109° | 38° |
| October | 54° | 79° | 4.5 in | 8 | 56% | 68% | 100° | 22° |
| November | 44° | 67° | 2.8 in | 7 | 66% | 58% | 93° | 17° |
| December | 35° | 58° | 2.9 in | 8 | 64% | 53% | 91° | -1° |
Station: GRAPEVINE DAM, 12 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Lewisville climate questions
How much rain does Lewisville get?
Lewisville gets 38.9 in of precipitation in an average year, over about 90 rainy days.
What is the wettest month in Lewisville?
May is the wettest month in Lewisville, with 4.7 in. August is the driest, with 2.1 in.
How many rainy days does Lewisville have a year?
Lewisville has about 90 days with measurable rain in an average year. May has the most, about 10.
Does it snow in Lewisville?
Rarely. The reporting station for Lewisville averages under 0.5 in of snow a season. The snowiest winter on record is 1977–78, with 17.6 in.
What is the hottest month in Lewisville?
July is the warmest month in Lewisville, with an average high of 96°F.
What is the coldest month in Lewisville?
January is the coldest month in Lewisville, with an average low of 33°F.
What is the record high temperature in Lewisville?
Within the available 1970–2026 station history, the record high at the Lewisville station is 110°F, set on July 13, 1998. The record low is -1°F, on December 23, 1989.
What is the sunniest month in Lewisville?
October is the sunniest month in Lewisville, with estimated sunshine of 68% of daylight hours from ERA5 cloud cover. May is the cloudiest.
When is the first frost in Lewisville?
The first fall freeze in Lewisville typically comes around November 14. The last spring freeze is around March 19.
What is the best time to visit Lewisville?
The most comfortable time to visit is typically March to April and October to November, when daytime highs sit near 73°F.