Grant County climate

Grant County Weather in August

NOAA 1991-2020 normals for Petersburg, 12.9 km from Grant County

Average highs run from 87°F on August 1 to 85°F on August 31, and lows from 63°F to 59°F. Normal precipitation for the month is 3.61 in.

August day by day

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

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

August at a glance

Average high
86°F
Average low
62°F
Precipitation
3.61 in
Record high
100°FAug 1, 1999
Record low
42°FAug 30, 2025
Chance of a freeze
0%
Days of 90°F or more
7.2
Daylight
14 h 11 min to 13 h 04 min
Cloud cover
59%
Humidity
69%
Dew point
59°F
Wind
3.1 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 187°F63°F100°F 199947°F 19970%
Aug 287°F63°F98°F 199547°F 19970%
Aug 387°F63°F96°F 199548°F 19980%
Aug 487°F63°F98°F 199550°F 19980%
Aug 587°F63°F96°F 199551°F 20130%
Aug 687°F63°F93°F 201148°F 20040%
Aug 787°F63°F93°F 200147°F 20040%
Aug 887°F63°F94°F 199947°F 19970%
Aug 987°F62°F95°F 200147°F 19970%
Aug 1087°F62°F96°F 200150°F 19990%
Aug 1187°F62°F96°F 201651°F 19990%
Aug 1287°F62°F96°F 201049°F 20060%
Aug 1387°F62°F96°F 201651°F 20220%
Aug 1486°F62°F100°F 202151°F 20040%
Aug 1586°F62°F95°F 200248°F 20140%
Aug 1686°F62°F95°F 201646°F 20140%
Aug 1786°F62°F98°F 200950°F 20130%
Aug 1886°F62°F98°F 201551°F 20080%
Aug 1986°F61°F99°F 200851°F 20080%
Aug 2086°F61°F90°F 199547°F 19980%
Aug 2186°F61°F97°F 200848°F 19980%
Aug 2286°F61°F91°F 201051°F 19980%
Aug 2386°F61°F96°F 200851°F 20060%
Aug 2486°F61°F99°F 200845°F 19970%
Aug 2586°F61°F94°F 200750°F 19970%
Aug 2686°F60°F93°F 202146°F 20250%
Aug 2786°F60°F96°F 201646°F 20250%
Aug 2886°F60°F94°F 200953°F 20100%
Aug 2985°F60°F95°F 201651°F 20140%
Aug 3085°F59°F97°F 202242°F 20250%
Aug 3185°F59°F94°F 201043°F 19990%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Grant County, in percent, and of at least 0.1 inch of snowfall.00.21102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

August 1
sunrise 6:17 AM, sunset 8:28 PM
August 31
sunrise 6:45 AM, sunset 7:49 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00466952 (Petersburg), public domain. Records: NOAA GHCN-Daily, station USC00466952, 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.