October is one of the warmer months of the year in Bozeman, with average highs near 10.1°C and lows around -2.3°C (mean 3.9°C). It is about average for rainfall, averaging 51 mm of rainfall and 66% relative humidity across the period.
October is one of the warmer months of the year in Bozeman. Across 45 years of records, the warmest October in Bozeman was 2024 — when the month averaged 7.9°C — while the coldest was 2019 at -1°C. Typical October days reach 10.1°C with nights near -2.3°C. The long-term trend is warming, about 0.2°C per decade.
October is about average for rainfall in Bozeman, averaging 51 mm of rainfall. The wettest October on record was 2016 with 97 mm, while the driest was 1987 at 3 mm.
Relative humidity in Bozeman during October averages 66%. The most humid October was 2009 at 78%, and the least humid was 1987 at 48%.
October receives about 2.9 kWh/m²/day of solar energy in Bozeman. The sunniest October was 1987 at 3.6 kWh/m²/day, and the cloudiest were 2009 and 2016 at 2.5.
Average wind speed in Bozeman during October is 0.7 m/s. The windiest Octobers were 1985, 1990 and 2020 at 0.8 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 3.9°C | 3.5°C | 3.4°C | 4.0°C | 5.2°C | +1.3°C |
| Avg High | 10.3°C | 9.8°C | 9.5°C | 9.9°C | 11.6°C | +1.3°C |
| Avg Low | -2.6°C | -2.7°C | -2.7°C | -1.9°C | -1.2°C | +1.4°C |
| Avg Rain | 35 mm | 49 mm | 59 mm | 54 mm | 57 mm | +22 mm |
October temperatures in Bozeman have risen by about 2.9°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -22.7°C (1991) to a record high of 25.9°C (2010).
Rainfall in October is about average for rainfall, averaging 51 mm, with a wettest year of 97 mm.
A good time to visit Bozeman
October is a good time to visit Bozeman, with days averaging 10.1°C and nights around -2.3°C (mean 3.9°C, close to Bozeman's yearly average) and moderate rainfall. July and August are marginally more temperate, but October still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 10.8°C | 4.7°C | -1.4°C | 21.7°C | -7.0°C | 75 mm | 67% | 0.6 m/s | 2.9 |
| 2024 🔥 | 15.2°C | 7.9°C | 0.7°C | 23.4°C | -5.6°C | 25 mm | 55% | 0.6 m/s | 3.4 |
| 2023 | 11.0°C | 4.5°C | -1.9°C | 21.5°C | -15.1°C | 60 mm | 73% | 0.6 m/s | 2.8 |
| 2022 | 12.6°C | 5.9°C | -0.7°C | 21.3°C | -11.0°C | 55 mm | 65% | 0.7 m/s | 3.2 |
| 2021 | 10.6°C | 4.6°C | -1.4°C | 22.7°C | -12.5°C | 65 mm | 70% | 0.7 m/s | 2.6 |
| 2020 | 9.7°C | 3.4°C | -2.8°C | 23.5°C | -18.5°C | 65 mm | 64% | 0.8 m/s | 2.8 |
| 2019 ❄️ | 4.4°C | -1.0°C | -6.3°C | 16.4°C | -19.2°C | 57 mm | 70% | 0.7 m/s | 2.8 |
| 2018 | 9.2°C | 3.6°C | -2.1°C | 18.6°C | -9.3°C | 67 mm | 71% | 0.6 m/s | 2.7 |
| 2017 | 8.3°C | 2.5°C | -3.4°C | 16.4°C | -7.7°C | 38 mm | 65% | 0.7 m/s | 3.1 |
| 2016 🌧️ | 10.2°C | 4.9°C | -0.4°C | 18.5°C | -8.1°C | 97 mm | 72% | 0.7 m/s | 2.5 |
| 2015 | 13.4°C | 7.0°C | 0.6°C | 21.7°C | -5.4°C | 52 mm | 67% | 0.7 m/s | 3 |
| 2014 | 13.1°C | 6.4°C | -0.2°C | 19.0°C | -6.0°C | 27 mm | 67% | 0.7 m/s | 3.2 |
| 2013 | 7.4°C | 1.8°C | -3.9°C | 16.5°C | -11.5°C | 46 mm | 72% | 0.6 m/s | 3 |
| 2012 | 9.6°C | 3.5°C | -2.7°C | 19.8°C | -8.8°C | 37 mm | 65% | 0.7 m/s | 2.8 |
| 2011 | 10.7°C | 5.1°C | -0.4°C | 25.6°C | -6.4°C | 64 mm | 70% | 0.6 m/s | 2.6 |
| 2010 | 12.3°C | 5.9°C | -0.5°C | 25.9°C | -10.3°C | 53 mm | 68% | 0.7 m/s | 3 |
| 2009 | 4.2°C | -0.7°C | -5.5°C | 16.9°C | -14.5°C | 84 mm | 78% | 0.7 m/s | 2.5 |
| 2008 | 10.5°C | 4.2°C | -2.0°C | 23.9°C | -13.4°C | 38 mm | 65% | 0.7 m/s | 2.9 |
| 2007 | 9.5°C | 3.4°C | -2.7°C | 18.7°C | -11.2°C | 83 mm | 72% | 0.7 m/s | 2.8 |
| 2006 | 7.6°C | 1.8°C | -3.9°C | 19.9°C | -14.7°C | 93 mm | 74% | 0.7 m/s | 2.7 |
| 2005 | 12.0°C | 5.9°C | -0.3°C | 20.3°C | -6.6°C | 61 mm | 68% | 0.6 m/s | 3 |
| 2004 | 10.2°C | 4.0°C | -2.1°C | 19.3°C | -10.2°C | 64 mm | 72% | 0.6 m/s | 2.8 |
| 2003 | 13.7°C | 6.7°C | -0.4°C | 24.3°C | -14.1°C | 34 mm | 52% | 0.7 m/s | 3.2 |
| 2002 | 7.4°C | 1.4°C | -4.6°C | 15.8°C | -15.8°C | 21 mm | 61% | 0.7 m/s | 3.2 |
| 2001 | 9.8°C | 3.5°C | -2.8°C | 23.2°C | -8.4°C | 55 mm | 60% | 0.7 m/s | 2.7 |
| 2000 | 10.5°C | 4.0°C | -2.5°C | 19.5°C | -6.7°C | 57 mm | 68% | 0.6 m/s | 3 |
| 1999 | 13.0°C | 5.6°C | -1.7°C | 21.2°C | -7.2°C | 18 mm | 52% | 0.7 m/s | 3.2 |
| 1998 | 10.7°C | 4.3°C | -2.0°C | 19.0°C | -6.7°C | 34 mm | 65% | 0.6 m/s | 3.1 |
| 1997 | 8.4°C | 3.1°C | -2.2°C | 22.2°C | -9.8°C | 63 mm | 71% | 0.7 m/s | 2.6 |
| 1996 | 9.0°C | 2.9°C | -3.2°C | 22.6°C | -16.6°C | 59 mm | 64% | 0.7 m/s | 3.1 |
| 1995 | 7.3°C | 1.6°C | -4.0°C | 19.0°C | -10.4°C | 73 mm | 68% | 0.7 m/s | 3 |
| 1994 | 8.6°C | 2.7°C | -3.3°C | 18.6°C | -8.6°C | 88 mm | 68% | 0.7 m/s | 3 |
| 1993 | 10.0°C | 3.7°C | -2.6°C | 22.4°C | -11.5°C | 32 mm | 66% | 0.6 m/s | 3.1 |
| 1992 | 11.9°C | 5.3°C | -1.3°C | 24.8°C | -7.6°C | 45 mm | 62% | 0.6 m/s | 2.8 |
| 1991 | 9.6°C | 2.9°C | -3.7°C | 23.2°C | -22.7°C | 40 mm | 59% | 0.7 m/s | 3 |
| 1990 | 9.0°C | 3.1°C | -2.7°C | 21.4°C | -7.7°C | 40 mm | 59% | 0.8 m/s | 2.8 |
| 1989 | 9.7°C | 3.5°C | -2.7°C | 19.2°C | -12.4°C | 57 mm | 66% | 0.7 m/s | 2.8 |
| 1988 | 15.3°C | 7.8°C | 0.3°C | 21.7°C | -7.2°C | 18 mm | 53% | 0.7 m/s | 3.3 |
| 1987 | 13.3°C | 5.8°C | -1.7°C | 23.1°C | -6.6°C | 3 mm | 48% | 0.7 m/s | 3.6 |
| 1986 | 11.7°C | 4.6°C | -2.5°C | 17.6°C | -8.0°C | 19 mm | 65% | 0.6 m/s | 3.4 |
| 1985 | 8.6°C | 2.5°C | -3.6°C | 16.2°C | -14.3°C | 35 mm | 66% | 0.8 m/s | 2.8 |
| 1984 | 6.5°C | 0.7°C | -5.1°C | 21.4°C | -14.0°C | 43 mm | 68% | 0.7 m/s | 2.9 |
| 1983 | 10.9°C | 4.6°C | -1.8°C | 17.0°C | -6.5°C | 47 mm | 71% | 0.6 m/s | — |
| 1982 | 8.1°C | 2.6°C | -3.0°C | 18.2°C | -6.9°C | 38 mm | 73% | 0.6 m/s | — |
| 1981 | 8.2°C | 2.6°C | -3.1°C | 19.3°C | -7.5°C | 59 mm | 68% | 0.6 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 10.1°C with lows near -2.3°C (mean 3.9°C), based on 45 years of NASA POWER data.
October averages 51 mm of rainfall in Bozeman, about average for rainfall. The wettest on record was 97 mm in 2016.
The hottest October reached 25.9°C in 2010. The coldest dipped to -22.7°C in 1991.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 2.9°C. Daytime highs moved from 8.5°C to 12°C and overnight lows from -3.3°C to -0.9°C over the same span.
October is one of the warmer months of the year in Bozeman and about average for rainfall, so plan for around 10.1°C daytime highs and -2.3°C at night.
Not quite — October is the 7th coolest month in Bozeman, averaging 3.9°C.
For October in Bozeman, pack warm layers and a jacket for chilly mornings, with typical highs of 10.1°C and lows of -2.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 66% — moderately humid.
Average wind speed in October is 0.7 m/s. The windiest October on record averaged 0.8 m/s (1985).
The wettest October on record was 2016 with 97 mm. On average, October sees 51 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 October, 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 October specifically, along with year-by-year records and how the month has changed over the decades.
