Mount Vernon climate

Mount Vernon Weather in August

NOAA 1991-2020 normals for Mt Vernon, 0.4 km from Mount Vernon

Average highs run from 88°F on August 1 to 86°F on August 31, and lows from 66°F to 63°F. Normal precipitation for the month is 2.95 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
87°F
Average low
65°F
Precipitation
2.95 in
Record high
108°FAug 17, 1936
Record low
44°FAug 29, 1986
Chance of a freeze
0%
Days of 90°F or more
9.8
Daylight
14 h 05 min to 13 h 01 min
Cloud cover
48%
Humidity
71%
Dew point
66°F
Wind
6.7 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 188°F66°F102°F 194252°F 197123%0%
Aug 288°F66°F102°F 194253°F 197723%0%
Aug 388°F66°F103°F 196451°F 196522%0%
Aug 488°F66°F101°F 201053°F 195022%0%
Aug 588°F66°F102°F 194753°F 197422%0%
Aug 688°F66°F102°F 193550°F 194822%0%
Aug 788°F66°F100°F 193551°F 200422%0%
Aug 888°F66°F102°F 198051°F 198922%0%
Aug 988°F66°F102°F 194152°F 197622%0%
Aug 1088°F65°F102°F 194152°F 197222%0%
Aug 1188°F65°F106°F 193653°F 196721%0%
Aug 1288°F65°F103°F 193650°F 196721%0%
Aug 1388°F65°F101°F 193646°F 196421%0%
Aug 1488°F65°F100°F 201048°F 200421%0%
Aug 1588°F65°F101°F 193648°F 200421%0%
Aug 1688°F65°F100°F 193648°F 196321%0%
Aug 1788°F65°F108°F 193652°F 200421%0%
Aug 1887°F65°F108°F 193652°F 194321%0%
Aug 1987°F65°F106°F 193649°F 194321%0%
Aug 2087°F65°F106°F 193649°F 194320%0%
Aug 2187°F64°F104°F 193648°F 194020%0%
Aug 2287°F64°F103°F 193647°F 194020%0%
Aug 2387°F64°F99°F 198749°F 195020%0%
Aug 2487°F64°F103°F 194350°F 195120%0%
Aug 2587°F64°F105°F 194347°F 194220%0%
Aug 2687°F64°F104°F 194347°F 194520%0%
Aug 2786°F63°F101°F 193649°F 194520%0%
Aug 2886°F63°F103°F 193649°F 196820%0%
Aug 2986°F63°F98°F 189744°F 198620%0%
Aug 3086°F63°F100°F 195145°F 198620%0%
Aug 3186°F63°F101°F 193646°F 194620%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 5:55 AM, sunset 8:00 PM
August 31
sunrise 6:21 AM, sunset 7:22 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00126001 (Mt Vernon), public domain. Records: NOAA GHCN-Daily, station USC00153762, 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.