Lewisville climate

Lewisville Weather in August

NOAA 1991-2020 normals for Grapevine Dam, 12.1 km from Lewisville

Average highs run from 97°F on August 1 to 93°F on August 31, and lows from 75°F to 72°F. Normal precipitation for the month is 2.09 in over about 6 wet days.

August day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Lewisville, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
96°F
Average low
74°F
Precipitation
2.09 in
Record high
109°FAug 19, 2024
Record low
59°FAug 21, 2015
Chance of a freeze
0%
Days of 90°F or more
27.1
Daylight
13 h 46 min to 12 h 52 min
Cloud cover
43%
Humidity
58%
Dew point
67°F
Wind
8.1 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Aug 197°F75°F106°F 201167°F 201816%0%
Aug 297°F75°F108°F 201166°F 201416%0%
Aug 397°F75°F108°F 201169°F 201816%0%
Aug 497°F75°F106°F 201167°F 202516%0%
Aug 597°F75°F105°F 201167°F 202516%0%
Aug 697°F75°F104°F 201172°F 202116%0%
Aug 797°F75°F104°F 202471°F 201717%0%
Aug 897°F75°F103°F 201171°F 201717%0%
Aug 997°F75°F106°F 201271°F 201817%0%
Aug 1097°F75°F106°F 202371°F 201817%0%
Aug 1197°F75°F104°F 200669°F 201818%0%
Aug 1297°F75°F105°F 202370°F 200918%0%
Aug 1397°F75°F104°F 202367°F 201418%0%
Aug 1497°F75°F102°F 200669°F 201418%0%
Aug 1596°F74°F103°F 200666°F 200819%0%
Aug 1696°F74°F103°F 200666°F 201319%0%
Aug 1796°F74°F108°F 202364°F 201319%0%
Aug 1896°F74°F108°F 202364°F 201319%0%
Aug 1996°F74°F109°F 202465°F 201519%0%
Aug 2095°F74°F106°F 201163°F 201520%0%
Aug 2195°F74°F107°F 202359°F 201520%0%
Aug 2295°F73°F104°F 201063°F 201220%0%
Aug 2395°F73°F106°F 201071°F 201220%0%
Aug 2495°F73°F106°F 201170°F 200820%0%
Aug 2594°F73°F106°F 202370°F 201020%0%
Aug 2694°F73°F107°F 202369°F 201621%0%
Aug 2794°F72°F107°F 201168°F 201021%0%
Aug 2894°F72°F106°F 201165°F 201021%0%
Aug 2993°F72°F104°F 202067°F 200921%0%
Aug 3093°F72°F102°F 201166°F 200622%0%
Aug 3193°F72°F103°F 201366°F 200922%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Lewisville, in percent, and of at least 0.1 inch of snowfall.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

August 1
sunrise 6:41 AM, sunset 8:27 PM
August 31
sunrise 7:02 AM, sunset 7:54 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00413691 (Grapevine Dam), public domain. Records: NOAA GHCN-Daily, station USC00417588, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.