Petroleum County climate

Petroleum County Weather in August

NOAA 1991-2020 normals for Valentine, 31 km from Petroleum County

Average highs run from 89°F on August 1 to 80°F on August 31, and lows from 55°F to 47°F. Normal precipitation for the month is 1.40 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 Petroleum County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
85°F
Average low
52°F
Precipitation
1.40 in
Record high
106°FAug 10, 1935
Record low
29°FAug 25, 1992
Chance of a freeze
3%
Days of 90°F or more
11.6
Daylight
14 h 54 min to 13 h 23 min
Cloud cover
48%
Humidity
43%
Dew point
46°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°F55°F100°F 202641°F 195019%0%
Aug 289°F55°F99°F 202639°F 193719%0%
Aug 388°F55°F103°F 196138°F 197419%0%
Aug 488°F55°F104°F 196141°F 195519%0%
Aug 588°F55°F105°F 196138°F 198019%0%
Aug 688°F55°F105°F 194937°F 200619%0%
Aug 788°F54°F102°F 198340°F 195719%0%
Aug 888°F54°F99°F 195838°F 193919%0%
Aug 988°F54°F100°F 193640°F 196019%0%
Aug 1087°F54°F106°F 193539°F 196019%0%
Aug 1187°F54°F101°F 198332°F 191419%0%
Aug 1287°F53°F102°F 194036°F 198719%0%
Aug 1387°F53°F102°F 193538°F 200519%0%
Aug 1486°F53°F101°F 197133°F 195918%0%
Aug 1586°F53°F100°F 199036°F 194418%0%
Aug 1686°F52°F100°F 197334°F 193818%0%
Aug 1785°F52°F98°F 202335°F 200218%0%
Aug 1885°F52°F101°F 194835°F 197818%0%
Aug 1985°F51°F97°F 194236°F 195018%0%
Aug 2084°F51°F98°F 197134°F 195618%0%
Aug 2184°F51°F99°F 196930°F 194518%0%
Aug 2284°F50°F104°F 197637°F 199218%0%
Aug 2383°F50°F102°F 196933°F 196618%0%
Aug 2483°F50°F102°F 196933°F 193418%0%
Aug 2583°F49°F99°F 198529°F 199218%0%
Aug 2682°F49°F97°F 193733°F 191419%0%
Aug 2782°F49°F98°F 197133°F 195419%0%
Aug 2881°F48°F98°F 193935°F 196019%0%
Aug 2981°F48°F96°F 193836°F 193719%0%
Aug 3081°F47°F99°F 193632°F 198019%0%
Aug 3180°F47°F103°F 195534°F 199219%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Petroleum 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 5:52 AM, sunset 8:46 PM
August 31
sunrise 6:31 AM, sunset 7:54 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00248498 (Valentine), public domain. Records: NOAA GHCN-Daily, station USC00243727, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.