Sweetwater County climate

Sweetwater County Weather in August

NOAA 1991-2020 normals for Rock Springs AP, 16.2 km from Sweetwater County

Average highs run from 85°F on August 1 to 77°F on August 31, and lows from 56°F to 49°F. Normal precipitation for the month is 0.56 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 Sweetwater County, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
82°F
Average low
53°F
Precipitation
0.56 in
Record high
97°FAug 2, 2026
Record low
33°FAug 31, 1962
Chance of a freeze
0%
Days of 90°F or more
2.1
Daylight
14 h 23 min to 13 h 09 min
Cloud cover
46%
Humidity
37%
Dew point
37°F
Wind
9.2 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 185°F56°F94°F 200840°F 197518%0%
Aug 285°F56°F97°F 202643°F 197518%0%
Aug 385°F56°F96°F 202444°F 199318%0%
Aug 485°F56°F92°F 196941°F 198018%0%
Aug 584°F56°F93°F 199444°F 197618%0%
Aug 684°F55°F93°F 200142°F 199318%0%
Aug 784°F55°F95°F 202643°F 199619%0%
Aug 884°F55°F92°F 195845°F 198719%0%
Aug 984°F55°F92°F 196938°F 197419%0%
Aug 1083°F55°F95°F 196935°F 197419%0%
Aug 1183°F55°F93°F 197244°F 195219%0%
Aug 1283°F54°F94°F 201840°F 197419%0%
Aug 1383°F54°F92°F 197042°F 200219%0%
Aug 1482°F54°F96°F 200337°F 197819%0%
Aug 1582°F54°F91°F 197140°F 197419%0%
Aug 1682°F53°F91°F 202334°F 196819%0%
Aug 1782°F53°F92°F 202035°F 196819%0%
Aug 1881°F53°F94°F 202039°F 197819%0%
Aug 1981°F53°F91°F 202538°F 197819%0%
Aug 2081°F52°F95°F 202536°F 196419%0%
Aug 2180°F52°F93°F 202634°F 196619%0%
Aug 2280°F52°F93°F 200937°F 195419%0%
Aug 2380°F52°F90°F 201136°F 196019%0%
Aug 2479°F51°F92°F 201135°F 196819%0%
Aug 2579°F51°F91°F 197034°F 197519%0%
Aug 2679°F51°F90°F 196934°F 199219%
Aug 2778°F50°F90°F 201135°F 197619%
Aug 2878°F50°F89°F 197438°F 196419%
Aug 2978°F50°F90°F 194834°F 196420%
Aug 3077°F50°F91°F 195435°F 196420%
Aug 3177°F49°F89°F 202233°F 196220%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Sweetwater County, 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 6:10 AM, sunset 8:33 PM
August 31
sunrise 6:41 AM, sunset 7:50 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00024027 (Rock Springs AP), public domain. Records: NOAA GHCN-Daily, station USW00024027, 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.