Casper climate

Casper Weather in August

NOAA 1991-2020 normals for Casper Wwtp, 1.8 km from Casper

Average highs run from 89°F on August 1 to 83°F on August 31, and lows from 59°F to 50°F. Normal precipitation for the month is 1.02 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 Casper, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
87°F
Average low
55°F
Precipitation
1.02 in
Record high
103°FAug 2, 2026
Record low
29°FAug 23, 2015
Chance of a freeze
0%
Days of 90°F or more
11.6
Daylight
14 h 29 min to 13 h 12 min
Cloud cover
44%
Humidity
40%
Dew point
42°F
Wind
8.9 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 189°F59°F99°F 200842°F 196820%0%
Aug 289°F59°F103°F 202645°F 197520%0%
Aug 389°F58°F99°F 202441°F 197420%0%
Aug 489°F58°F97°F 197941°F 198020%0%
Aug 589°F58°F102°F 197939°F 198019%0%
Aug 689°F58°F101°F 200140°F 199619%0%
Aug 789°F58°F100°F 199534°F 199619%0%
Aug 888°F58°F99°F 202644°F 199619%0%
Aug 988°F57°F99°F 199239°F 202519%0%
Aug 1088°F57°F101°F 202239°F 200219%0%
Aug 1188°F57°F99°F 200039°F 200419%0%
Aug 1288°F57°F100°F 201837°F 200419%0%
Aug 1387°F56°F99°F 200038°F 200219%0%
Aug 1487°F56°F99°F 200339°F 202319%0%
Aug 1587°F56°F95°F 199241°F 197419%
Aug 1687°F56°F96°F 198238°F 200919%
Aug 1787°F55°F97°F 201336°F 200219%
Aug 1886°F55°F99°F 198637°F 200919%
Aug 1986°F54°F97°F 201937°F 200219%
Aug 2086°F54°F99°F 202538°F 201619%
Aug 2186°F54°F99°F 202638°F 201618%
Aug 2285°F53°F97°F 200936°F 196618%
Aug 2385°F53°F98°F 202029°F 201518%
Aug 2485°F53°F97°F 199439°F 201018%
Aug 2584°F52°F96°F 196936°F 196418%
Aug 2684°F52°F98°F 199439°F 200518%
Aug 2784°F51°F96°F 199537°F 197618%
Aug 2884°F51°F95°F 199534°F 200418%
Aug 2983°F51°F97°F 201236°F 202418%
Aug 3083°F50°F96°F 194834°F 196518%
Aug 3183°F50°F94°F 195433°F 196518%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Casper, 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 5:57 AM, sunset 8:26 PM
August 31
sunrise 6:29 AM, sunset 7:41 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00481569 (Casper Wwtp), public domain. Records: NOAA GHCN-Daily, station USW00024089, 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.