Grand County Weather in August
Average highs run from 79°F on August 1 to 74°F on August 31, and lows from 46°F to 39°F. Normal precipitation for the month is 1.44 in over about 10 wet days.
August day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
August at a glance
- Average high
- 77°F
- Average low
- 43°F
- Precipitation
- 1.44 in
- Record high
- 88°FAug 10, 2003
- Record low
- 25°FAug 27, 1992
- Chance of a freeze
- 10%
- Daylight
- 14 h 15 min to 13 h 06 min
- Cloud cover
- 60%
- Humidity
- 53%
- Dew point
- 38°F
- Wind
- 3.8 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.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Aug 1 | 79°F | 46°F | 86°F 2008 | 33°F 1995 | 34% | 0% |
| Aug 2 | 79°F | 46°F | 85°F 2008 | 33°F 1975 | 34% | 0% |
| Aug 3 | 79°F | 45°F | 86°F 2026 | 32°F 1975 | 34% | 0% |
| Aug 4 | 79°F | 45°F | 84°F 1979 | 32°F 1950 | 34% | 0% |
| Aug 5 | 79°F | 45°F | 85°F 1987 | 33°F 1956 | 34% | 0% |
| Aug 6 | 79°F | 45°F | 85°F 1979 | 33°F 1950 | 34% | 0% |
| Aug 7 | 79°F | 45°F | 83°F 1979 | 32°F 1950 | 34% | 0% |
| Aug 8 | 79°F | 45°F | 83°F 1969 | 32°F 1950 | 34% | 0% |
| Aug 9 | 78°F | 45°F | 82°F 1969 | 31°F 2009 | 34% | 0% |
| Aug 10 | 78°F | 45°F | 88°F 2003 | 32°F 2002 | 33% | 0% |
| Aug 11 | 78°F | 44°F | 85°F 2003 | 32°F 1974 | 33% | 0% |
| Aug 12 | 78°F | 44°F | 83°F 2007 | 30°F 1997 | 33% | 0% |
| Aug 13 | 78°F | 44°F | 85°F 2007 | 31°F 1985 | 33% | 0% |
| Aug 14 | 78°F | 44°F | 85°F 2007 | 26°F 2002 | 33% | 0% |
| Aug 15 | 77°F | 44°F | 85°F 2002 | 30°F 1951 | 33% | 0% |
| Aug 16 | 77°F | 43°F | 85°F 2002 | 30°F 1980 | 33% | 0% |
| Aug 17 | 77°F | 43°F | 85°F 2002 | 28°F 1980 | 33% | 0% |
| Aug 18 | 77°F | 43°F | 83°F 1987 | 29°F 1950 | 33% | 0% |
| Aug 19 | 77°F | 43°F | 86°F 2002 | 26°F 1978 | 33% | 0% |
| Aug 20 | 77°F | 42°F | 84°F 2023 | 32°F 1978 | 33% | 0% |
| Aug 21 | 76°F | 42°F | 83°F 2023 | 29°F 1964 | 33% | 0% |
| Aug 22 | 76°F | 42°F | 85°F 2007 | 26°F 1949 | 33% | 0% |
| Aug 23 | 76°F | 42°F | 82°F 1949 | 30°F 1964 | 32% | 0% |
| Aug 24 | 76°F | 41°F | 81°F 2011 | 27°F 1968 | 32% | 0% |
| Aug 25 | 76°F | 41°F | 81°F 1993 | 29°F 1962 | 32% | 0% |
| Aug 26 | 75°F | 41°F | 86°F 2002 | 31°F 1960 | 32% | 0% |
| Aug 27 | 75°F | 41°F | 82°F 1994 | 25°F 1992 | 32% | 0% |
| Aug 28 | 75°F | 40°F | 82°F 2002 | 26°F 1992 | 32% | 0% |
| Aug 29 | 75°F | 40°F | 82°F 1948 | 28°F 2004 | 32% | 0% |
| Aug 30 | 75°F | 40°F | 82°F 1990 | 27°F 1964 | 31% | 0% |
| Aug 31 | 74°F | 39°F | 82°F 1990 | 30°F 1956 | 31% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- August 1
- sunrise 6:03 AM, sunset 8:18 PM
- August 31
- sunrise 6:31 AM, sunset 7:37 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00059096 (Williams Fork Dam), public domain. Records: NOAA GHCN-Daily, station USC00053500, 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.