Chinook climate

Chinook Weather in August

NOAA 1991-2020 normals for Chinook, 0.4 km from Chinook

Average highs run from 87°F on August 1 to 78°F on August 31, and lows from 55°F to 47°F. Normal precipitation for the month is 1.14 in over about 5 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 Chinook, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
83°F
Average low
52°F
Precipitation
1.14 in
Record high
111°FAug 5, 1961
Record low
33°FAug 23, 2015
Chance of a freeze
0%
Days of 90°F or more
9.7
Daylight
15 h 03 min to 13 h 27 min
Cloud cover
50%
Humidity
48%
Dew point
46°F
Wind
9.4 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 187°F55°F106°F 202643°F 196819%0%
Aug 287°F55°F100°F 197145°F 196719%0%
Aug 387°F55°F109°F 200139°F 197819%0%
Aug 487°F55°F103°F 196140°F 202619%0%
Aug 586°F55°F111°F 196140°F 197719%0%
Aug 686°F54°F107°F 198345°F 199618%0%
Aug 786°F54°F107°F 200143°F 197318%0%
Aug 886°F54°F103°F 197143°F 198018%0%
Aug 986°F54°F101°F 199141°F 198518%0%
Aug 1085°F54°F105°F 201836°F 199718%0%
Aug 1185°F54°F102°F 201840°F 200418%0%
Aug 1285°F53°F100°F 200136°F 198718%0%
Aug 1385°F53°F101°F 200136°F 200518%0%
Aug 1484°F53°F103°F 197141°F 200518%0%
Aug 1584°F52°F104°F 200341°F 197018%0%
Aug 1684°F52°F101°F 197138°F 201218%0%
Aug 1783°F52°F101°F 202034°F 200218%0%
Aug 1883°F52°F105°F 200140°F 200518%0%
Aug 1983°F51°F98°F 200838°F 199618%0%
Aug 2082°F51°F102°F 197139°F 200518%0%
Aug 2182°F51°F102°F 196937°F 201818%0%
Aug 2282°F50°F102°F 197635°F 199218%0%
Aug 2381°F50°F106°F 196933°F 201518%0%
Aug 2481°F50°F110°F 196937°F 199218%0%
Aug 2581°F49°F103°F 197033°F 199218%0%
Aug 2680°F49°F103°F 201037°F 201218%0%
Aug 2780°F48°F99°F 200136°F 198818%0%
Aug 2879°F48°F99°F 201237°F 198819%0%
Aug 2979°F48°F102°F 200537°F 200019%0%
Aug 3079°F47°F100°F 199936°F 196919%0%
Aug 3178°F47°F102°F 199136°F 198119%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Chinook, 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 5:51 AM, sunset 8:54 PM
August 31
sunrise 6:33 AM, sunset 8:00 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00241722 (Chinook), public domain. Records: NOAA GHCN-Daily, station USW00094012, 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.