Beaverhead County climate

Beaverhead County Weather in August

NOAA 1991-2020 normals for Dillon 18 Wsw, 8.8 km from Beaverhead County

Average highs run from 83°F on August 1 to 75°F on August 31, and lows from 45°F to 38°F. Normal precipitation for the month is 0.69 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 Beaverhead County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
79°F
Average low
42°F
Precipitation
0.69 in
Record high
102°FAug 12, 1940
Record low
30°FAug 31, 1956
Chance of a freeze
46%
Days of 90°F or more
1.5
Daylight
14 h 41 min to 13 h 18 min
Cloud cover
42%
Humidity
49%
Dew point
37°F
Wind
5.6 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 183°F45°F94°F 194934°F 198519%0%
Aug 282°F45°F98°F 195435°F 198519%0%
Aug 382°F45°F97°F 196138°F 194819%0%
Aug 482°F45°F98°F 196138°F 194519%0%
Aug 582°F44°F101°F 196139°F 194519%0%
Aug 682°F44°F97°F 194939°F 201819%0%
Aug 782°F44°F98°F 197040°F 194819%0%
Aug 881°F44°F94°F 196338°F 197619%0%
Aug 981°F44°F95°F 194035°F 200219%0%
Aug 1081°F44°F96°F 196936°F 197419%0%
Aug 1181°F43°F97°F 200337°F 197719%0%
Aug 1280°F43°F102°F 194036°F 198719%0%
Aug 1380°F43°F97°F 194034°F 194719%0%
Aug 1480°F43°F95°F 200335°F 195918%0%
Aug 1580°F42°F94°F 202333°F 198518%0%
Aug 1679°F42°F94°F 196634°F 198518%0%
Aug 1779°F42°F95°F 194435°F 197818%0%
Aug 1879°F42°F94°F 198635°F 197818%0%
Aug 1979°F41°F96°F 194236°F 196418%0%
Aug 2078°F41°F94°F 195337°F 201618%0%
Aug 2178°F41°F95°F 200933°F 196618%0%
Aug 2278°F41°F93°F 195536°F 196619%0%
Aug 2378°F40°F95°F 196735°F 196219%0%
Aug 2477°F40°F97°F 196935°F 198519%0%
Aug 2577°F40°F93°F 200835°F 201219%0%
Aug 2677°F40°F95°F 198537°F 198919%0%
Aug 2776°F39°F91°F 201733°F 194519%0%
Aug 2876°F39°F95°F 201232°F 196019%0%
Aug 2976°F39°F91°F 198834°F 197519%0%
Aug 3075°F39°F93°F 195431°F 196519%0%
Aug 3175°F38°F96°F 195530°F 195619%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Beaverhead 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 6:17 AM, sunset 8:58 PM
August 31
sunrise 6:52 AM, sunset 8:10 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00004137 (Dillon 18 Wsw), public domain. Records: NOAA GHCN-Daily, station USW00024138, 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.