November is one of the cooler months of the year in Helena, with average highs near 2.9°C and lows around -6.7°C (mean -1.9°C). It is about average for rainfall, averaging 33 mm of rainfall and 79% relative humidity across the period.
November is one of the cooler months of the year in Helena. Across 45 years of records, the warmest November in Helena was 1999 — when the month averaged 2.8°C — while the coldest was 1985 at -8.7°C. Typical November days reach 2.9°C with nights near -6.7°C. The long-term trend is warming, about 0.4°C per decade.
November is about average for rainfall in Helena, averaging 33 mm of rainfall. The wettest November on record was 1995 with 61 mm, while the driest was 1987 at 10 mm.
Relative humidity in Helena during November averages 79%. The most humid November was 2010 at 89%, and the least humid was 1999 at 66%.
November receives about 1.6 kWh/m²/day of solar energy in Helena. The sunniest November was 2000 at 1.9 kWh/m²/day, and the cloudiest was 2010 at 1.3.
Average wind speed in Helena during November is 1.3 m/s. The windiest Novembers were 1989 and 1990 at 1.7 m/s, while the calmest were 1982 and 1987 at 1.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -2.4°C | -2.1°C | -1.6°C | -2.3°C | -0.6°C | +1.8°C |
| Avg High | 2.2°C | 2.6°C | 3.3°C | 2.6°C | 4.4°C | +2.2°C |
| Avg Low | -7.1°C | -6.7°C | -6.4°C | -7.1°C | -5.5°C | +1.6°C |
| Avg Rain | 29 mm | 37 mm | 29 mm | 42 mm | 25 mm | -4 mm |
November temperatures in Helena have risen by about 2.7°C between 1981–1985 and 2021–2025.
November has ranged from a record low of -31.3°C (2010) to a record high of 18.8°C (2016).
Rainfall in November is about average for rainfall, averaging 33 mm, with a wettest year of 61 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.5°C per decade while lows rose 0.3°C per decade, widening the gap between day and night.
A quieter season to visit Helena
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Helena. That said, November — with days averaging 2.9°C and nights around -6.7°C (mean -1.9°C) and moderate rainfall (33 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 7.5°C | 2.4°C | -2.7°C | 18.0°C | -15.1°C | 23 mm | 76% | 1.2 m/s | 1.6 |
| 2024 | 3.5°C | -0.6°C | -4.8°C | 10.3°C | -9.3°C | 30 mm | 78% | 1.3 m/s | 1.5 |
| 2023 | 5.6°C | 0.6°C | -4.5°C | 12.0°C | -12.6°C | 14 mm | 78% | 1.2 m/s | 1.8 |
| 2022 | -0.5°C | -5.8°C | -11.1°C | 14.9°C | -20.9°C | 34 mm | 81% | 1.5 m/s | 1.7 |
| 2021 | 6.0°C | 1.4°C | -3.2°C | 14.0°C | -7.4°C | 23 mm | 73% | 1.5 m/s | 1.6 |
| 2020 | 4.0°C | -1.5°C | -6.9°C | 17.4°C | -14.3°C | 28 mm | 80% | 1.5 m/s | 1.7 |
| 2019 | 2.4°C | -2.1°C | -6.7°C | 10.5°C | -15.3°C | 24 mm | 81% | 1.2 m/s | 1.7 |
| 2018 | 2.2°C | -2.3°C | -6.8°C | 6.8°C | -14.4°C | 46 mm | 86% | 1.3 m/s | 1.5 |
| 2017 | 2.4°C | -2.3°C | -7.0°C | 11.3°C | -16.8°C | 57 mm | 85% | 1.3 m/s | 1.4 |
| 2016 | 8.1°C | 2.5°C | -3.1°C | 18.8°C | -11.7°C | 16 mm | 76% | 1.2 m/s | 1.8 |
| 2015 | 1.2°C | -3.3°C | -7.9°C | 10.9°C | -15.4°C | 42 mm | 80% | 1.4 m/s | 1.6 |
| 2014 | 1.0°C | -3.8°C | -8.7°C | 16.5°C | -20.2°C | 61 mm | 81% | 1.6 m/s | 1.6 |
| 2013 | 3.3°C | -1.3°C | -5.9°C | 10.2°C | -16.3°C | 31 mm | 80% | 1.2 m/s | 1.7 |
| 2012 | 3.8°C | -0.9°C | -5.5°C | 15.4°C | -15.5°C | 42 mm | 84% | 1.3 m/s | 1.5 |
| 2011 | 1.3°C | -3.7°C | -8.6°C | 7.2°C | -16.3°C | 39 mm | 78% | 1.5 m/s | 1.7 |
| 2010 | 0.3°C | -5.3°C | -11.0°C | 17.1°C | -31.3°C | 59 mm | 89% | 1.4 m/s | 1.3 |
| 2009 | 3.5°C | -1.5°C | -6.6°C | 11.7°C | -12.9°C | 20 mm | 78% | 1.3 m/s | 1.8 |
| 2008 | 4.7°C | 0.4°C | -3.9°C | 14.9°C | -9.7°C | 42 mm | 82% | 1.4 m/s | 1.6 |
| 2007 | 3.3°C | -1.6°C | -6.6°C | 11.6°C | -15.6°C | 34 mm | 76% | 1.4 m/s | 1.6 |
| 2006 | 2.7°C | -1.8°C | -6.3°C | 14.8°C | -21.0°C | 36 mm | 78% | 1.5 m/s | 1.6 |
| 2005 | 2.6°C | -1.9°C | -6.4°C | 13.9°C | -14.7°C | 52 mm | 83% | 1.4 m/s | 1.6 |
| 2004 | 4.2°C | -0.7°C | -5.6°C | 13.2°C | -12.5°C | 22 mm | 79% | 1.2 m/s | 1.8 |
| 2003 | 1.0°C | -3.9°C | -8.7°C | 11.2°C | -16.0°C | 26 mm | 72% | 1.5 m/s | 1.7 |
| 2002 | 4.4°C | -0.4°C | -5.2°C | 11.6°C | -13.3°C | 23 mm | 78% | 1.3 m/s | 1.6 |
| 2001 | 7.0°C | 1.4°C | -4.1°C | 16.5°C | -12.8°C | 17 mm | 74% | 1.2 m/s | 1.8 |
| 2000 | -0.5°C | -5.6°C | -10.7°C | 9.8°C | -16.3°C | 22 mm | 80% | 1.3 m/s | 1.9 |
| 1999 🔥 | 8.6°C | 2.8°C | -3.1°C | 18.4°C | -10.3°C | 22 mm | 66% | 1.3 m/s | 1.6 |
| 1998 | 3.4°C | -0.6°C | -4.5°C | 8.3°C | -11.4°C | 50 mm | 80% | 1.3 m/s | 1.4 |
| 1997 | 3.1°C | -2.0°C | -7.1°C | 15.2°C | -13.8°C | 22 mm | 81% | 1.2 m/s | 1.8 |
| 1996 | 1.3°C | -3.6°C | -8.6°C | 9.9°C | -16.2°C | 57 mm | 87% | 1.2 m/s | 1.7 |
| 1995 🌧️ | 3.3°C | -0.5°C | -4.3°C | 10.2°C | -13.4°C | 61 mm | 81% | 1.5 m/s | 1.7 |
| 1994 | 0.2°C | -4.5°C | -9.1°C | 7.5°C | -18.2°C | 36 mm | 79% | 1.5 m/s | 1.8 |
| 1993 | -0.1°C | -4.9°C | -9.8°C | 5.7°C | -23.0°C | 22 mm | 77% | 1.4 m/s | 1.8 |
| 1992 | 1.7°C | -2.6°C | -7.0°C | 8.8°C | -13.5°C | 25 mm | 81% | 1.3 m/s | 1.5 |
| 1991 | 0.7°C | -4.1°C | -8.9°C | 6.4°C | -23.4°C | 42 mm | 85% | 1.3 m/s | 1.7 |
| 1990 | 3.8°C | -0.5°C | -4.9°C | 12.9°C | -10.7°C | 32 mm | 71% | 1.7 m/s | 1.4 |
| 1989 | 3.7°C | -0.6°C | -4.9°C | 11.5°C | -11.5°C | 30 mm | 77% | 1.7 m/s | 1.5 |
| 1988 | 1.8°C | -2.4°C | -6.6°C | 15.3°C | -15.7°C | 32 mm | 78% | 1.5 m/s | 1.5 |
| 1987 | 6.6°C | 1.1°C | -4.4°C | 15.2°C | -10.3°C | 10 mm | 73% | 1.1 m/s | 1.7 |
| 1986 | 0.8°C | -4.1°C | -9.0°C | 9.5°C | -21.4°C | 41 mm | 84% | 1.4 m/s | 1.6 |
| 1985 ❄️ | -4.5°C | -8.7°C | -13.0°C | 13.6°C | -24.9°C | 34 mm | 81% | 1.4 m/s | 1.7 |
| 1984 | 2.4°C | -2.1°C | -6.7°C | 8.1°C | -14.6°C | 32 mm | 81% | 1.3 m/s | 1.5 |
| 1983 | 2.3°C | -1.7°C | -5.8°C | 13.5°C | -20.9°C | 33 mm | 81% | 1.2 m/s | — |
| 1982 | 1.1°C | -3.8°C | -8.7°C | 7.4°C | -16.7°C | 21 mm | 80% | 1.1 m/s | — |
| 1981 | 6.0°C | 0.6°C | -4.8°C | 17.6°C | -14.8°C | 29 mm | 78% | 1.2 m/s | — |
Actual recorded November data for each year, 1981–2025 — sourced from NASA POWER.
The average high in November is around 2.9°C with lows near -6.7°C (mean -1.9°C), based on 45 years of NASA POWER data.
November averages 33 mm of rainfall in Helena, about average for rainfall. The wettest on record was 61 mm in 1995.
The hottest November reached 18.8°C in 2016. The coldest dipped to -31.3°C in 2010.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average November temperatures have risen by about 2.7°C. Daytime highs moved from 1.5°C to 4.4°C and overnight lows from -7.8°C to -5.3°C over the same span.
November is one of the cooler months of the year in Helena and about average for rainfall, so plan for around 2.9°C daytime highs and -6.7°C at night.
Not quite — November is the 4th coolest month in Helena, averaging -1.9°C.
For November in Helena, pack warm layers and a jacket for chilly mornings, with typical highs of 2.9°C and lows of -6.7°C.
Relative humidity in November averages 79% — quite humid.
Average wind speed in November is 1.3 m/s. The windiest November on record averaged 1.7 m/s (1989).
The wettest November on record was 1995 with 61 mm. On average, November sees 33 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 Helena behaves each November, 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 November specifically, along with year-by-year records and how the month has changed over the decades.
