Mount Vernon climate

Mount Vernon Weather in August

NOAA 1991-2020 normals for Mt Vernon, 0.9 km from Mount Vernon

Average highs run from 96°F on August 1 to 92°F on August 31, and lows from 73°F to 70°F. Normal precipitation for the month is 3.10 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 Mount Vernon, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
95°F
Average low
72°F
Precipitation
3.10 in
Record high
118°FAug 10, 1936
Record low
48°FAug 13, 1967
Chance of a freeze
0%
Days of 90°F or more
23.9
Daylight
13 h 46 min to 12 h 52 min
Cloud cover
44%
Humidity
61%
Dew point
68°F
Wind
6.3 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 196°F73°F107°F 192357°F 193618%0%
Aug 296°F73°F107°F 201157°F 196518%0%
Aug 396°F73°F109°F 199859°F 196518%0%
Aug 496°F73°F109°F 201155°F 192018%0%
Aug 596°F73°F109°F 201156°F 197618%0%
Aug 696°F73°F108°F 201161°F 197318%0%
Aug 796°F73°F107°F 193660°F 195718%0%
Aug 896°F73°F109°F 193654°F 198918%0%
Aug 996°F73°F110°F 193455°F 198919%0%
Aug 1096°F73°F118°F 193656°F 198919%0%
Aug 1195°F73°F108°F 193558°F 199719%0%
Aug 1295°F73°F110°F 193753°F 196719%0%
Aug 1395°F73°F110°F 193448°F 196719%0%
Aug 1495°F72°F107°F 193449°F 196719%0%
Aug 1595°F72°F105°F 192552°F 196719%0%
Aug 1695°F72°F107°F 193954°F 196319%0%
Aug 1795°F72°F108°F 195653°F 199220%0%
Aug 1895°F72°F111°F 202654°F 199220%0%
Aug 1995°F72°F109°F 202655°F 199220%0%
Aug 2094°F72°F109°F 202557°F 199220%0%
Aug 2194°F72°F112°F 202653°F 194020%0%
Aug 2294°F71°F107°F 202354°F 194020%0%
Aug 2394°F71°F107°F 202656°F 195620%0%
Aug 2494°F71°F108°F 202659°F 192320%0%
Aug 2594°F71°F106°F 202356°F 199720%0%
Aug 2693°F71°F106°F 193854°F 196620%0%
Aug 2793°F70°F109°F 202355°F 201021%0%
Aug 2893°F70°F108°F 202352°F 190621%0%
Aug 2993°F70°F106°F 202651°F 199221%0%
Aug 3093°F70°F106°F 193852°F 199221%0%
Aug 3192°F70°F109°F 195455°F 198621%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Mount Vernon, 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 6:34 AM, sunset 8:20 PM
August 31
sunrise 6:55 AM, sunset 7:47 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00416119 (Mt Vernon), public domain. Records: NOAA GHCN-Daily, station USC00416108, 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.