Grantsville climate

Grantsville Weather in August

NOAA 1991-2020 normals for Grantsville 2W, 3.7 km from Grantsville

Average highs run from 94°F on August 1 to 86°F on August 31, and lows from 65°F to 57°F. Normal precipitation for the month is 0.73 in over about 4 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 Grantsville, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
90°F
Average low
62°F
Precipitation
0.73 in
Record high
105°FAug 1, 2000
Record low
36°FAug 7, 1910
Chance of a freeze
0%
Days of 90°F or more
19.7
Daylight
14 h 18 min to 13 h 07 min
Cloud cover
42%
Humidity
34%
Dew point
42°F
Wind
7.4 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°F65°F105°F 200045°F 199513%0%
Aug 294°F65°F101°F 200152°F 192813%0%
Aug 393°F65°F100°F 193450°F 193713%0%
Aug 493°F65°F102°F 199453°F 189613%0%
Aug 593°F65°F100°F 199452°F 199113%0%
Aug 693°F65°F102°F 200052°F 194813%0%
Aug 793°F64°F101°F 202636°F 191013%0%
Aug 893°F64°F101°F 200038°F 191013%0%
Aug 992°F64°F102°F 199041°F 199513%0%
Aug 1092°F64°F102°F 200349°F 198513%0%
Aug 1192°F64°F103°F 200348°F 190713%0%
Aug 1292°F63°F100°F 194048°F 199513%0%
Aug 1392°F63°F102°F 200050°F 199513%0%
Aug 1491°F63°F100°F 200345°F 197813%0%
Aug 1591°F62°F99°F 200748°F 189914%0%
Aug 1691°F62°F100°F 200246°F 194114%0%
Aug 1790°F62°F99°F 200048°F 196814%0%
Aug 1890°F62°F102°F 200143°F 196814%0%
Aug 1990°F61°F102°F 190343°F 199514%0%
Aug 2090°F61°F103°F 202644°F 197414%0%
Aug 2189°F60°F100°F 202641°F 192414%0%
Aug 2289°F60°F100°F 200942°F 190414%0%
Aug 2389°F60°F97°F 200642°F 196014%0%
Aug 2488°F59°F99°F 201140°F 191114%0%
Aug 2588°F59°F100°F 201142°F 199215%0%
Aug 2688°F59°F100°F 198538°F 199215%0%
Aug 2787°F58°F101°F 201141°F 199215%0%
Aug 2887°F58°F98°F 194045°F 196015%0%
Aug 2986°F57°F98°F 200540°F 193215%0%
Aug 3086°F57°F97°F 200738°F 192615%0%
Aug 3186°F57°F98°F 194037°F 190815%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Grantsville, in percent, and of at least 0.1 inch of snowfall.051015201102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MDT).

August 1
sunrise 6:27 AM, sunset 8:45 PM
August 31
sunrise 6:56 AM, sunset 8:03 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00423348 (Grantsville 2W), public domain. Records: NOAA GHCN-Daily, station USC00428771, 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.