West Yellowstone climate

West Yellowstone Weather in August

NOAA 1991-2020 normals for W Yellowstone Gateway, 1.2 km from West Yellowstone

Average highs run from 81°F on August 1 to 74°F on August 31, and lows from 40°F to 32°F. Normal precipitation for the month is 1.39 in.

August day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at West Yellowstone, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
78°F
Average low
36°F
Precipitation
1.39 in
Record high
94°FAug 12, 2018
Record low
16°FAug 6, 2018
Chance of a freeze
94%
Daylight
14 h 39 min to 13 h 17 min
Cloud cover
45%
Humidity
49%
Dew point
38°F
Wind
4.7 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 181°F40°F89°F 202233°F 20150%
Aug 281°F40°F91°F 202634°F 20140%
Aug 381°F39°F91°F 202429°F 20180%
Aug 481°F39°F90°F 202427°F 20180%
Aug 581°F39°F89°F 200727°F 20120%
Aug 681°F39°F88°F 201216°F 20180%
Aug 780°F39°F86°F 202528°F 20170%
Aug 880°F38°F86°F 200827°F 20180%
Aug 980°F38°F89°F 201229°F 20120%
Aug 1080°F38°F89°F 201229°F 20120%
Aug 1179°F38°F92°F 201831°F 20210%
Aug 1279°F37°F94°F 201831°F 20110%
Aug 1379°F37°F87°F 202530°F 20110%
Aug 1479°F37°F89°F 200728°F 20120%
Aug 1578°F37°F89°F 200723°F 20180%
Aug 1678°F36°F88°F 201322°F 20180%
Aug 1778°F36°F90°F 201318°F 20180%
Aug 1878°F36°F92°F 202029°F 20090%
Aug 1977°F35°F87°F 201327°F 20150%
Aug 2077°F35°F89°F 202526°F 20160%
Aug 2177°F35°F88°F 202627°F 20180%
Aug 2276°F35°F89°F 200920°F 20180%
Aug 2376°F34°F88°F 200924°F 20180%
Aug 2476°F34°F85°F 202527°F 20080%
Aug 2576°F34°F87°F 201123°F 20180%
Aug 2675°F34°F87°F 200825°F 20120%
Aug 2775°F33°F87°F 201127°F 20190%
Aug 2875°F33°F86°F 201122°F 20180%
Aug 2974°F33°F87°F 201225°F 20180%
Aug 3074°F33°F85°F 201622°F 20180%
Aug 3174°F32°F88°F 201618°F 20180%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at West Yellowstone, in percent, and of at least 0.1 inch of snowfall.00.21102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MDT).

August 1
sunrise 6:11 AM, sunset 8:50 PM
August 31
sunrise 6:46 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 USC00248858 (W Yellowstone Gateway), public domain. Records: NOAA GHCN-Daily, station USC00248858, 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.