August is one of the warmer months of the year in Bozeman, with average highs near 24.7°C and lows around 8.3°C (mean 16.5°C). It is one of the drier months, averaging 40 mm of rainfall and 51% relative humidity across the period.
August is one of the warmer months of the year in Bozeman. Across 45 years of records, the warmest August in Bozeman was 2022 — when the month averaged 19.4°C — while the coldest was 1993 at 12.4°C. Typical August days reach 24.7°C with nights near 8.3°C. The long-term trend is warming, about 0.2°C per decade.
August is one of the drier months in Bozeman, averaging 40 mm of rainfall. The wettest August on record was 2014 with 99 mm, while the driest was 2001 at 6 mm.
Relative humidity in Bozeman during August averages 51%. The most humid August was 1993 at 66%, and the least humid was 1988 at 35%.
August receives about 6 kWh/m²/day of solar energy in Bozeman. The sunniest Augusts were 2001 and 2016 at 6.6 kWh/m²/day, and the cloudiest was 2014 at 5.3.
Average wind speed in Bozeman during August is 0.5 m/s. The windiest Augusts were 2023, 2024 and 2025, among others at 0.5 m/s, while the calmest were 2013, 2014 and 2019, among others at 0.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.1°C | 16.2°C | 16.6°C | 16.5°C | 17.6°C | +1.5°C |
| Avg High | 24.5°C | 24.5°C | 25.1°C | 24.4°C | 25.4°C | +0.9°C |
| Avg Low | 7.6°C | 7.9°C | 8.1°C | 8.5°C | 9.7°C | +2.1°C |
| Avg Rain | 40 mm | 43 mm | 33 mm | 37 mm | 48 mm | +7 mm |
August temperatures in Bozeman have risen by about 0.9°C between 1981–1985 and 2021–2025.
August has ranged from a record low of -3°C (1992) to a record high of 34.2°C (2018).
Rainfall in August is one of the drier months, averaging 40 mm, with a wettest year of 99 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.1°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
One of the best times to visit Bozeman
August is one of the best times to visit Bozeman. Expect days averaging 24.7°C and nights around 8.3°C (mean 16.5°C) — warmer than Bozeman's yearly average — with moderate rainfall (40 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 25.6°C | 17.6°C | 9.6°C | 32.7°C | 4.3°C | 43 mm | 52% | 0.5 m/s | 5.8 |
| 2024 | 25.7°C | 17.3°C | 8.9°C | 33.5°C | 1.8°C | 38 mm | 50% | 0.5 m/s | 5.9 |
| 2023 | 23.8°C | 16.8°C | 9.9°C | 32.0°C | 5.3°C | 83 mm | 61% | 0.5 m/s | 5.5 |
| 2022 🔥 | 27.6°C | 19.4°C | 11.3°C | 33.5°C | 6.0°C | 29 mm | 47% | 0.5 m/s | 6.2 |
| 2021 | 24.0°C | 16.3°C | 8.6°C | 30.4°C | 3.1°C | 68 mm | 53% | 0.5 m/s | 5.4 |
| 2020 | 25.7°C | 17.9°C | 10.1°C | 31.0°C | 4.1°C | 25 mm | 52% | 0.5 m/s | 6 |
| 2019 | 24.6°C | 17.0°C | 9.4°C | 29.7°C | 4.7°C | 29 mm | 57% | 0.4 m/s | 6 |
| 2018 | 23.4°C | 15.6°C | 7.8°C | 34.2°C | -0.1°C | 20 mm | 56% | 0.5 m/s | 5.6 |
| 2017 | 24.7°C | 16.9°C | 9.0°C | 29.2°C | 5.2°C | 20 mm | 50% | 0.5 m/s | 6.2 |
| 2016 | 24.4°C | 16.0°C | 7.5°C | 30.6°C | 1.7°C | 21 mm | 46% | 0.5 m/s | 6.6 |
| 2015 | 24.2°C | 16.3°C | 8.4°C | 31.1°C | 1.2°C | 44 mm | 53% | 0.5 m/s | 5.7 |
| 2014 🌧️ | 22.3°C | 15.3°C | 8.4°C | 30.0°C | 1.2°C | 99 mm | 64% | 0.4 m/s | 5.3 |
| 2013 | 27.0°C | 18.4°C | 9.8°C | 31.5°C | 6.5°C | 19 mm | 47% | 0.4 m/s | 6.1 |
| 2012 | 26.5°C | 17.6°C | 8.6°C | 32.9°C | 2.7°C | 15 mm | 44% | 0.5 m/s | 6.3 |
| 2011 | 24.9°C | 17.0°C | 9.1°C | 30.3°C | 5.6°C | 36 mm | 56% | 0.5 m/s | 6.3 |
| 2010 | 22.1°C | 14.4°C | 6.7°C | 28.6°C | 0.2°C | 63 mm | 61% | 0.5 m/s | 5.8 |
| 2009 | 23.0°C | 15.3°C | 7.6°C | 30.7°C | 2.0°C | 60 mm | 60% | 0.4 m/s | 5.8 |
| 2008 | 24.9°C | 16.4°C | 7.8°C | 30.8°C | 2.3°C | 27 mm | 49% | 0.5 m/s | 6.3 |
| 2007 | 26.0°C | 17.4°C | 8.7°C | 31.7°C | 3.6°C | 33 mm | 47% | 0.5 m/s | 6 |
| 2006 | 24.8°C | 16.0°C | 7.3°C | 30.3°C | 0.1°C | 31 mm | 47% | 0.5 m/s | 6.2 |
| 2005 | 23.8°C | 15.4°C | 7.1°C | 31.1°C | 0.2°C | 58 mm | 54% | 0.5 m/s | 6.2 |
| 2004 | 22.5°C | 14.8°C | 7.1°C | 30.2°C | 2.9°C | 42 mm | 55% | 0.5 m/s | 5.9 |
| 2003 | 27.8°C | 19.1°C | 10.4°C | 34.0°C | 3.5°C | 21 mm | 43% | 0.5 m/s | 6.2 |
| 2002 | 23.3°C | 14.6°C | 5.9°C | 27.1°C | 3.0°C | 30 mm | 49% | 0.5 m/s | 6.2 |
| 2001 | 27.9°C | 18.7°C | 9.5°C | 34.1°C | 4.8°C | 6 mm | 39% | 0.5 m/s | 6.6 |
| 2000 | 27.0°C | 18.1°C | 9.2°C | 32.7°C | 4.0°C | 21 mm | 39% | 0.5 m/s | 6.3 |
| 1999 | 25.2°C | 17.2°C | 9.3°C | 30.5°C | 4.3°C | 81 mm | 52% | 0.5 m/s | 5.8 |
| 1998 | 25.5°C | 17.1°C | 8.7°C | 31.4°C | 3.4°C | 26 mm | 52% | 0.5 m/s | 6.2 |
| 1997 | 22.9°C | 15.3°C | 7.7°C | 29.2°C | 3.3°C | 71 mm | 64% | 0.4 m/s | 6.2 |
| 1996 | 25.2°C | 16.3°C | 7.4°C | 31.2°C | 0.4°C | 27 mm | 46% | 0.5 m/s | 6.1 |
| 1995 | 24.6°C | 15.9°C | 7.1°C | 29.9°C | 0.9°C | 52 mm | 50% | 0.5 m/s | 6.5 |
| 1994 | 26.6°C | 17.8°C | 9.0°C | 30.5°C | 2.0°C | 16 mm | 45% | 0.4 m/s | 6.2 |
| 1993 ❄️ | 19.6°C | 12.4°C | 5.1°C | 26.4°C | -2.2°C | 72 mm | 66% | 0.5 m/s | 5.7 |
| 1992 | 23.4°C | 15.3°C | 7.1°C | 29.4°C | -3.0°C | 16 mm | 47% | 0.5 m/s | 6.1 |
| 1991 | 26.9°C | 18.1°C | 9.4°C | 32.6°C | 5.9°C | 29 mm | 44% | 0.5 m/s | 6 |
| 1990 | 25.0°C | 16.8°C | 8.6°C | 32.5°C | 2.9°C | 46 mm | 50% | 0.5 m/s | 6 |
| 1989 | 23.0°C | 15.0°C | 7.0°C | 28.1°C | -0.3°C | 43 mm | 52% | 0.5 m/s | 5.5 |
| 1988 | 25.9°C | 16.5°C | 7.0°C | 31.2°C | 3.2°C | 11 mm | 35% | 0.5 m/s | 6.5 |
| 1987 | 21.5°C | 13.5°C | 5.5°C | 28.6°C | -0.3°C | 63 mm | 55% | 0.5 m/s | 6.1 |
| 1986 | 25.0°C | 16.5°C | 8.1°C | 29.8°C | 3.1°C | 51 mm | 49% | 0.5 m/s | 5.9 |
| 1985 | 22.6°C | 14.0°C | 5.4°C | 30.2°C | 0.0°C | 46 mm | 47% | 0.5 m/s | 5.6 |
| 1984 | 24.8°C | 16.7°C | 8.7°C | 30.4°C | 5.3°C | 59 mm | 52% | 0.5 m/s | 5.7 |
| 1983 | 25.8°C | 17.8°C | 9.8°C | 33.4°C | 4.8°C | 45 mm | 55% | 0.4 m/s | — |
| 1982 | 25.5°C | 17.0°C | 8.4°C | 31.0°C | 4.9°C | 32 mm | 52% | 0.5 m/s | — |
| 1981 | 26.6°C | 17.6°C | 8.6°C | 32.0°C | 3.5°C | 13 mm | 47% | 0.5 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 24.7°C with lows near 8.3°C (mean 16.5°C), based on 45 years of NASA POWER data.
August averages 40 mm of rainfall in Bozeman, one of the drier months. The wettest on record was 99 mm in 2014.
The hottest August reached 34.2°C in 2018. The coldest dipped to -3°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.9°C. Daytime highs moved from 25.1°C to 25.3°C and overnight lows from 8.2°C to 9.7°C over the same span.
August is one of the warmer months of the year in Bozeman and one of the drier months, so plan for around 24.7°C daytime highs and 8.3°C at night.
Not quite — August is the 11th coolest month in Bozeman, averaging 16.5°C.
For August in Bozeman, pack light layers you can adjust through the day, with typical highs of 24.7°C and lows of 8.3°C.
Relative humidity in August averages 51% — relatively dry.
Average wind speed in August is 0.5 m/s. The windiest August on record averaged 0.5 m/s (1981).
The wettest August on record was 2014 with 99 mm. On average, August sees 40 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Bozeman behaves each August, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for August specifically, along with year-by-year records and how the month has changed over the decades.
