Big Sky climate

Big Sky Weather in August

NOAA 1991-2020 normals for Big Sky 2WNW, 3.4 km from Big Sky

Average highs run from 80°F on August 1 to 73°F on August 31, and lows from 42°F to 36°F. Normal precipitation for the month is 1.56 in over about 11 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 Big Sky, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
77°F
Average low
39°F
Precipitation
1.56 in
Record high
101°FAug 3, 2024
Record low
27°FAug 28, 1960
Chance of a freeze
75%
Daylight
14 h 43 min to 13 h 18 min
Cloud cover
47%
Humidity
51%
Dew point
39°F
Wind
4.9 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 180°F42°F95°F 200038°F 196835%0%
Aug 280°F42°F97°F 202635°F 193735%0%
Aug 380°F42°F101°F 202434°F 193835%0%
Aug 479°F42°F96°F 191835°F 198035%0%
Aug 579°F41°F97°F 196135°F 193535%0%
Aug 679°F41°F96°F 201235°F 201835%0%
Aug 779°F41°F96°F 199035°F 201735%0%
Aug 879°F41°F94°F 200531°F 193935%0%
Aug 979°F41°F94°F 196535°F 197035%0%
Aug 1078°F40°F95°F 192830°F 193935%0%
Aug 1178°F40°F97°F 201835°F 197735%0%
Aug 1278°F40°F98°F 201835°F 198735%0%
Aug 1378°F40°F96°F 192333°F 200635%0%
Aug 1477°F40°F95°F 197130°F 200535%0%
Aug 1577°F39°F95°F 192032°F 194435%0%
Aug 1677°F39°F94°F 196634°F 193535%0%
Aug 1777°F39°F96°F 201331°F 194235%0%
Aug 1877°F39°F96°F 191934°F 194635%0%
Aug 1976°F39°F92°F 194231°F 193935%0%
Aug 2076°F38°F95°F 202530°F 193935%0%
Aug 2176°F38°F94°F 202632°F 194535%0%
Aug 2276°F38°F96°F 200931°F 196635%0%
Aug 2375°F38°F95°F 196931°F 196635%0%
Aug 2475°F38°F94°F 191930°F 193435%0%
Aug 2575°F37°F94°F 196628°F 199235%0%
Aug 2675°F37°F97°F 192428°F 199235%0%
Aug 2774°F37°F94°F 192230°F 194534%0%
Aug 2874°F37°F91°F 198127°F 196034%0%
Aug 2974°F37°F93°F 201231°F 192434%0%
Aug 3074°F37°F92°F 195429°F 199334%0%
Aug 3173°F36°F95°F 201628°F 193234%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Big Sky, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MDT).

August 1
sunrise 6:10 AM, sunset 8:53 PM
August 31
sunrise 6:46 AM, sunset 8:04 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00240775 (Big Sky 2WNW), public domain. Records: NOAA GHCN-Daily, station USC00242793, 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.