Rockwall County climate

Rockwall County Weather in August

NOAA 1991-2020 normals for Lavon Dam, 16.9 km from Rockwall County

Average highs run from 94°F on August 1 to 91°F on August 31, and lows from 74°F to 71°F. Normal precipitation for the month is 2.15 in over about 5 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 Rockwall County, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
93°F
Average low
73°F
Precipitation
2.15 in
Record high
108°FAug 6, 1956
Record low
48°FAug 27, 2015
Chance of a freeze
0%
Days of 90°F or more
26.5
Daylight
13 h 45 min to 12 h 52 min
Cloud cover
43%
Humidity
60%
Dew point
67°F
Wind
7.6 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 194°F74°F107°F 199864°F 197116%0%
Aug 294°F74°F106°F 199861°F 196516%0%
Aug 394°F74°F107°F 199860°F 199616%0%
Aug 494°F74°F107°F 201161°F 201616%0%
Aug 594°F74°F107°F 201158°F 201616%0%
Aug 694°F74°F108°F 195665°F 197817%0%
Aug 794°F74°F107°F 195656°F 199717%0%
Aug 894°F74°F105°F 195457°F 199717%0%
Aug 994°F74°F104°F 198856°F 198917%0%
Aug 1094°F74°F104°F 201157°F 198917%0%
Aug 1194°F74°F105°F 196462°F 198917%0%
Aug 1294°F74°F108°F 196460°F 200417%0%
Aug 1394°F74°F105°F 199857°F 196718%0%
Aug 1494°F74°F104°F 195458°F 200418%0%
Aug 1594°F73°F105°F 195651°F 201518%0%
Aug 1694°F73°F106°F 195659°F 199218%0%
Aug 1794°F73°F108°F 195657°F 199218%0%
Aug 1894°F73°F105°F 195658°F 201318%0%
Aug 1993°F73°F105°F 200664°F 199219%0%
Aug 2093°F73°F107°F 198462°F 199219%0%
Aug 2193°F73°F105°F 201156°F 201519%0%
Aug 2293°F73°F105°F 201156°F 201519%0%
Aug 2393°F73°F105°F 198053°F 201519%0%
Aug 2492°F72°F104°F 198054°F 201519%0%
Aug 2592°F72°F104°F 200559°F 196619%0%
Aug 2692°F72°F102°F 198053°F 201520%0%
Aug 2792°F72°F105°F 199948°F 201520%0%
Aug 2892°F72°F104°F 201160°F 199220%0%
Aug 2991°F71°F104°F 199551°F 201520%0%
Aug 3091°F71°F104°F 199859°F 198620%0%
Aug 3191°F71°F106°F 195459°F 198620%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Rockwall County, 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 6:39 AM, sunset 8:24 PM
August 31
sunrise 7:00 AM, sunset 7:52 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00415094 (Lavon Dam), public domain. Records: NOAA GHCN-Daily, station USC00415094, 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.