Dillon Weather in August
Average highs run from 85°F on August 1 to 76°F on August 31, and lows from 48°F to 43°F. Normal precipitation for the month is 0.86 in over about 6 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
- 81°F
- Average low
- 46°F
- Precipitation
- 0.86 in
- Record high
- 102°FAug 12, 1940
- Record low
- 30°FAug 31, 1956
- Chance of a freeze
- 13%
- Days of 90°F or more
- 4.7
- Daylight
- 14 h 42 min to 13 h 18 min
- Cloud cover
- 42%
- Humidity
- 50%
- Dew point
- 38°F
- Wind
- 6.0 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 | 85°F | 48°F | 94°F 1949 | 34°F 1985 | 19% | 0% |
| Aug 2 | 84°F | 48°F | 98°F 1954 | 35°F 1985 | 19% | 0% |
| Aug 3 | 84°F | 48°F | 97°F 1961 | 38°F 1948 | 19% | 0% |
| Aug 4 | 84°F | 48°F | 98°F 1961 | 38°F 1945 | 19% | 0% |
| Aug 5 | 84°F | 48°F | 101°F 1961 | 39°F 1945 | 19% | 0% |
| Aug 6 | 84°F | 48°F | 97°F 1949 | 39°F 2018 | 19% | 0% |
| Aug 7 | 84°F | 47°F | 98°F 1970 | 40°F 1948 | 19% | 0% |
| Aug 8 | 83°F | 47°F | 94°F 1963 | 38°F 1976 | 19% | 0% |
| Aug 9 | 83°F | 47°F | 95°F 1940 | 35°F 2002 | 19% | 0% |
| Aug 10 | 83°F | 47°F | 96°F 1969 | 36°F 1974 | 19% | 0% |
| Aug 11 | 83°F | 47°F | 97°F 2003 | 37°F 1977 | 19% | 0% |
| Aug 12 | 82°F | 46°F | 102°F 1940 | 36°F 1987 | 19% | 0% |
| Aug 13 | 82°F | 46°F | 97°F 1940 | 34°F 1947 | 19% | 0% |
| Aug 14 | 82°F | 46°F | 95°F 2003 | 35°F 1959 | 19% | 0% |
| Aug 15 | 81°F | 46°F | 94°F 2023 | 33°F 1985 | 19% | 0% |
| Aug 16 | 81°F | 46°F | 94°F 1966 | 34°F 1985 | 19% | 0% |
| Aug 17 | 81°F | 45°F | 95°F 1944 | 35°F 1978 | 19% | 0% |
| Aug 18 | 81°F | 45°F | 94°F 1986 | 35°F 1978 | 19% | 0% |
| Aug 19 | 80°F | 45°F | 96°F 1942 | 36°F 1964 | 19% | 0% |
| Aug 20 | 80°F | 45°F | 94°F 1953 | 37°F 2016 | 19% | 0% |
| Aug 21 | 80°F | 45°F | 95°F 2009 | 33°F 1966 | 19% | 0% |
| Aug 22 | 79°F | 44°F | 93°F 1955 | 36°F 1966 | 19% | 0% |
| Aug 23 | 79°F | 44°F | 95°F 1967 | 35°F 1962 | 19% | 0% |
| Aug 24 | 79°F | 44°F | 97°F 1969 | 35°F 1985 | 19% | 0% |
| Aug 25 | 78°F | 44°F | 93°F 2008 | 35°F 2012 | 19% | 0% |
| Aug 26 | 78°F | 43°F | 95°F 1985 | 37°F 1989 | 19% | 0% |
| Aug 27 | 78°F | 43°F | 91°F 2017 | 33°F 1945 | 19% | 0% |
| Aug 28 | 77°F | 43°F | 95°F 2012 | 32°F 1960 | 19% | 0% |
| Aug 29 | 77°F | 43°F | 91°F 1988 | 34°F 1975 | 19% | 0% |
| Aug 30 | 77°F | 43°F | 93°F 1954 | 31°F 1965 | 19% | 0% |
| Aug 31 | 76°F | 43°F | 96°F 1955 | 30°F 1956 | 18% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- August 1
- sunrise 6:16 AM, sunset 8:58 PM
- August 31
- sunrise 6:51 AM, sunset 8:09 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00242409 (Dillon U Of Montana Western), 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.