October is one of the warmer months of the year in Bellingham, with average highs near 13.9°C and lows around 6.5°C (mean 10.2°C). It is a relatively wet time of year, averaging 149 mm of rainfall and 84% relative humidity across the period.
October is one of the warmer months of the year in Bellingham. Across 45 years of records, the warmest October in Bellingham was 2022 — when the month averaged 14.1°C — while the coldest was 1984 at 8.1°C. Typical October days reach 13.9°C with nights near 6.5°C. The long-term October temperature trend is broadly flat.
October is a relatively wet time of year in Bellingham, averaging 149 mm of rainfall. The wettest October on record was 2003 with 334 mm, while the driest was 1987 at 21 mm.
Relative humidity in Bellingham during October averages 84%. The most humid October was 2024 at 93%, and the least humid was 1987 at 69%.
October receives about 2.2 kWh/m²/day of solar energy in Bellingham. The sunniest October was 1987 at 2.8 kWh/m²/day, and the cloudiest was 1988 at 1.7.
Average wind speed in Bellingham during October is 0.7 m/s. The windiest Octobers were 1996, 2016 and 2025, among others at 0.8 m/s, while the calmest were 2018, 2022 and 2023, 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 | 10.3°C | 9.9°C | 10.1°C | 10.5°C | 10.3°C | 0°C |
| Avg High | 14.2°C | 13.6°C | 13.8°C | 14.2°C | 13.6°C | -0.6°C |
| Avg Low | 6.4°C | 6.2°C | 6.5°C | 6.9°C | 7.0°C | +0.6°C |
| Avg Rain | 135 mm | 145 mm | 149 mm | 155 mm | 167 mm | +33 mm |
October temperatures in Bellingham have risen by about 1.1°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -9.3°C (1984) to a record high of 29.9°C (1987).
Rainfall in October is a relatively wet time of year, averaging 149 mm, with a wettest year of 334 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A good time to visit Bellingham
October is a good time to visit Bellingham, with days averaging 13.9°C and nights around 6.5°C (mean 10.2°C, close to Bellingham's yearly average) and higher rainfall. August and July 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 | 11.1°C | 8.2°C | 5.3°C | 16.8°C | 0.4°C | 178 mm | 92% | 0.8 m/s | 2.1 |
| 2024 | 11.6°C | 8.9°C | 6.2°C | 17.5°C | 2.5°C | 250 mm | 93% | 0.7 m/s | 2.2 |
| 2023 | 15.3°C | 11.2°C | 7.1°C | 26.5°C | -1.5°C | 105 mm | 83% | 0.6 m/s | 2.4 |
| 2022 🔥 | 18.3°C | 14.1°C | 9.9°C | 28.2°C | 5.0°C | 135 mm | 82% | 0.6 m/s | 2.7 |
| 2021 | 12.2°C | 9.2°C | 6.2°C | 16.3°C | 0.3°C | 189 mm | 89% | 0.7 m/s | 2 |
| 2020 | 13.3°C | 10.3°C | 7.2°C | 21.6°C | -3.2°C | 147 mm | 87% | 0.7 m/s | 2.2 |
| 2019 | 12.1°C | 8.4°C | 4.7°C | 15.6°C | -2.5°C | 147 mm | 82% | 0.7 m/s | 2.3 |
| 2018 | 14.9°C | 10.7°C | 6.5°C | 23.6°C | 2.0°C | 130 mm | 83% | 0.6 m/s | 2.5 |
| 2017 | 13.9°C | 9.9°C | 5.9°C | 24.3°C | 2.4°C | 192 mm | 84% | 0.7 m/s | 2.5 |
| 2016 | 13.4°C | 10.3°C | 7.2°C | 17.1°C | 2.8°C | 254 mm | 88% | 0.8 m/s | 1.8 |
| 2015 | 16.5°C | 12.7°C | 8.9°C | 24.8°C | 5.3°C | 121 mm | 84% | 0.6 m/s | 2.1 |
| 2014 | 15.6°C | 12.5°C | 9.5°C | 21.8°C | 4.2°C | 203 mm | 88% | 0.6 m/s | 1.9 |
| 2013 | 14.0°C | 9.8°C | 5.6°C | 19.7°C | 1.2°C | 50 mm | 81% | 0.6 m/s | 2.5 |
| 2012 | 13.5°C | 10.0°C | 6.5°C | 24.8°C | 0.3°C | 239 mm | 87% | 0.7 m/s | 2.1 |
| 2011 | 12.8°C | 9.6°C | 6.5°C | 18.4°C | 2.6°C | 115 mm | 88% | 0.6 m/s | 2.1 |
| 2010 | 14.8°C | 11.1°C | 7.4°C | 21.7°C | 2.6°C | 96 mm | 85% | 0.7 m/s | 2.4 |
| 2009 | 12.9°C | 9.2°C | 5.6°C | 17.4°C | -0.5°C | 195 mm | 82% | 0.7 m/s | 2.2 |
| 2008 | 13.2°C | 9.5°C | 5.7°C | 24.4°C | 0.7°C | 92 mm | 84% | 0.7 m/s | 2.2 |
| 2007 | 12.8°C | 9.3°C | 5.8°C | 22.9°C | 0.2°C | 162 mm | 87% | 0.7 m/s | 1.9 |
| 2006 | 14.4°C | 10.3°C | 6.3°C | 20.4°C | -2.6°C | 74 mm | 79% | 0.6 m/s | 2.5 |
| 2005 | 14.4°C | 10.9°C | 7.5°C | 19.5°C | 2.7°C | 176 mm | 87% | 0.7 m/s | 1.9 |
| 2004 | 14.3°C | 11.0°C | 7.6°C | 25.0°C | 1.5°C | 127 mm | 85% | 0.7 m/s | 2.2 |
| 2003 🌧️ | 14.8°C | 11.4°C | 8.0°C | 22.7°C | -2.7°C | 334 mm | 85% | 0.7 m/s | 2 |
| 2002 | 14.5°C | 10.1°C | 5.8°C | 24.2°C | -1.8°C | 29 mm | 79% | 0.6 m/s | 2.5 |
| 2001 | 12.7°C | 9.2°C | 5.8°C | 22.1°C | 0.8°C | 179 mm | 86% | 0.7 m/s | 2.1 |
| 2000 | 14.1°C | 10.2°C | 6.4°C | 24.0°C | 2.2°C | 128 mm | 84% | 0.7 m/s | 2.3 |
| 1999 | 14.1°C | 9.9°C | 5.7°C | 23.1°C | 1.2°C | 163 mm | 81% | 0.7 m/s | 2.5 |
| 1998 | 14.5°C | 10.5°C | 6.5°C | 23.1°C | 1.5°C | 119 mm | 86% | 0.7 m/s | 2 |
| 1997 | 12.7°C | 9.7°C | 6.8°C | 20.4°C | 1.8°C | 213 mm | 89% | 0.7 m/s | 2.1 |
| 1996 | 12.9°C | 9.0°C | 5.1°C | 26.0°C | -2.0°C | 204 mm | 86% | 0.8 m/s | 2.1 |
| 1995 | 12.3°C | 9.1°C | 5.9°C | 17.0°C | -0.1°C | 179 mm | 88% | 0.7 m/s | 2.2 |
| 1994 | 13.7°C | 9.9°C | 6.2°C | 19.6°C | 2.8°C | 132 mm | 82% | 0.7 m/s | 2.4 |
| 1993 | 16.4°C | 12.1°C | 7.9°C | 27.6°C | 3.4°C | 84 mm | 79% | 0.6 m/s | 2.4 |
| 1992 | 13.9°C | 10.3°C | 6.7°C | 22.1°C | -1.4°C | 91 mm | 85% | 0.7 m/s | 2 |
| 1991 | 14.1°C | 9.7°C | 5.4°C | 27.2°C | -3.1°C | 37 mm | 76% | 0.7 m/s | 2.6 |
| 1990 | 11.3°C | 8.4°C | 5.4°C | 15.8°C | 2.1°C | 231 mm | 89% | 0.7 m/s | 2 |
| 1989 | 13.9°C | 10.0°C | 6.2°C | 19.7°C | -1.1°C | 125 mm | 83% | 0.7 m/s | 2.3 |
| 1988 | 16.4°C | 12.4°C | 8.4°C | 27.5°C | 1.1°C | 137 mm | 83% | 0.6 m/s | 1.7 |
| 1987 | 17.4°C | 12.6°C | 7.8°C | 29.9°C | 3.4°C | 21 mm | 69% | 0.6 m/s | 2.8 |
| 1986 | 16.4°C | 12.0°C | 7.6°C | 21.7°C | 4.2°C | 69 mm | 78% | 0.6 m/s | 2.2 |
| 1985 | 11.7°C | 8.5°C | 5.4°C | 17.9°C | -2.9°C | 269 mm | 85% | 0.8 m/s | 2 |
| 1984 ❄️ | 11.7°C | 8.1°C | 4.6°C | 20.2°C | -9.3°C | 154 mm | 83% | 0.8 m/s | 2 |
| 1983 | 13.3°C | 9.4°C | 5.6°C | 19.8°C | 2.3°C | 85 mm | 83% | 0.7 m/s | — |
| 1982 | 14.1°C | 10.1°C | 6.1°C | 24.8°C | -0.7°C | 138 mm | 83% | 0.8 m/s | — |
| 1981 | 13.3°C | 9.7°C | 6.1°C | 19.1°C | 2.0°C | 215 mm | 85% | 0.7 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 13.9°C with lows near 6.5°C (mean 10.2°C), based on 45 years of NASA POWER data.
October averages 149 mm of rainfall in Bellingham, a relatively wet time of year. The wettest on record was 334 mm in 2003.
The hottest October reached 29.9°C in 1987. The coldest dipped to -9.3°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1.1°C. Daytime highs moved from 12.8°C to 13.7°C and overnight lows from 5.6°C to 6.9°C over the same span.
October is one of the warmer months of the year in Bellingham and a relatively wet time of year, so plan for around 13.9°C daytime highs and 6.5°C at night.
Not quite — October is the 7th coolest month in Bellingham, averaging 10.2°C.
For October in Bellingham, pack warm layers and a jacket for chilly mornings, with typical highs of 13.9°C and lows of 6.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 84% — quite humid.
Average wind speed in October is 0.7 m/s. The windiest October on record averaged 0.8 m/s (1982).
The wettest October on record was 2003 with 334 mm. On average, October sees 149 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 Bellingham 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.
