October is one of the warmer months of the year in Snohomish, with average highs near 13°C and lows around 5.2°C (mean 9.1°C). It is a relatively wet time of year, averaging 186 mm of rainfall and 85% relative humidity across the period.
October is one of the warmer months of the year in Snohomish. Across 45 years of records, the warmest October in Snohomish was 2022 — when the month averaged 13.4°C — while the coldest was 2025 at 6.3°C. Typical October days reach 13°C with nights near 5.2°C. The long-term October temperature trend is broadly flat.
October is a relatively wet time of year in Snohomish, averaging 186 mm of rainfall. The wettest October on record was 2016 with 385 mm, while the driest was 1987 at 18 mm.
Relative humidity in Snohomish during October averages 85%. The most humid October was 2025 at 94%, and the least humid was 1987 at 63%.
October receives about 2.3 kWh/m²/day of solar energy in Snohomish. The sunniest October was 1987 at 2.9 kWh/m²/day, and the cloudiest was 2016 at 1.8.
Average wind speed in Snohomish during October is 0.3 m/s. The windiest Octobers were 2013, 2018 and 2019, among others at 0.4 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.3°C | 8.7°C | 8.9°C | 9.4°C | 9.1°C | -0.2°C |
| Avg High | 13.7°C | 12.5°C | 12.6°C | 13.2°C | 12.7°C | -1°C |
| Avg Low | 4.9°C | 4.9°C | 5.1°C | 5.7°C | 5.5°C | +0.6°C |
| Avg Rain | 166 mm | 198 mm | 167 mm | 209 mm | 193 mm | +27 mm |
October temperatures in Snohomish have risen by about 1.1°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -7.8°C (1984) to a record high of 29.8°C (1987).
Rainfall in October is a relatively wet time of year, averaging 186 mm, with a wettest year of 385 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A good time to visit Snohomish
October is a good time to visit Snohomish, with days averaging 13°C and nights around 5.2°C (mean 9.1°C, close to Snohomish'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 ❄️ | 9.3°C | 6.3°C | 3.4°C | 15.4°C | -1.1°C | 223 mm | 94% | 0.3 m/s | 2.3 |
| 2024 | 10.1°C | 7.1°C | 4.1°C | 18.7°C | 1.4°C | 209 mm | 93% | 0.3 m/s | 2.3 |
| 2023 | 14.6°C | 10.3°C | 6.0°C | 27.2°C | -2.5°C | 97 mm | 83% | 0.3 m/s | 2.5 |
| 2022 🔥 | 18.2°C | 13.4°C | 8.7°C | 27.6°C | 3.4°C | 154 mm | 76% | 0.3 m/s | 2.8 |
| 2021 | 11.3°C | 8.1°C | 4.9°C | 16.2°C | -1.2°C | 247 mm | 89% | 0.3 m/s | 2.1 |
| 2020 | 12.7°C | 9.3°C | 5.9°C | 22.2°C | -7.0°C | 225 mm | 89% | 0.3 m/s | 2.5 |
| 2019 | 11.1°C | 7.0°C | 3.0°C | 15.0°C | -4.2°C | 188 mm | 82% | 0.4 m/s | 2.5 |
| 2018 | 14.3°C | 10.0°C | 5.6°C | 23.7°C | 1.1°C | 148 mm | 82% | 0.4 m/s | 2.5 |
| 2017 | 13.2°C | 8.9°C | 4.7°C | 20.4°C | 0.7°C | 216 mm | 84% | 0.3 m/s | 2.6 |
| 2016 🌧️ | 12.3°C | 9.1°C | 5.9°C | 16.9°C | 0.1°C | 385 mm | 90% | 0.3 m/s | 1.8 |
| 2015 | 15.4°C | 11.7°C | 8.0°C | 24.2°C | 4.1°C | 203 mm | 84% | 0.3 m/s | 2.1 |
| 2014 | 14.6°C | 11.4°C | 8.3°C | 21.8°C | 3.5°C | 262 mm | 89% | 0.3 m/s | 2.1 |
| 2013 | 13.3°C | 8.9°C | 4.4°C | 19.1°C | 1.0°C | 61 mm | 83% | 0.4 m/s | 2.6 |
| 2012 | 12.9°C | 9.2°C | 5.4°C | 24.7°C | -0.2°C | 291 mm | 85% | 0.3 m/s | 2.3 |
| 2011 | 11.6°C | 8.4°C | 5.3°C | 17.5°C | 1.0°C | 170 mm | 90% | 0.3 m/s | 2.1 |
| 2010 | 13.2°C | 9.6°C | 6.0°C | 21.4°C | 1.1°C | 162 mm | 86% | 0.3 m/s | 2.4 |
| 2009 | 11.4°C | 7.8°C | 4.2°C | 15.8°C | -0.6°C | 260 mm | 83% | 0.3 m/s | 2.1 |
| 2008 | 12.3°C | 8.5°C | 4.6°C | 24.5°C | 0.1°C | 103 mm | 84% | 0.3 m/s | 2.3 |
| 2007 | 11.6°C | 8.0°C | 4.4°C | 21.3°C | -0.2°C | 182 mm | 89% | 0.3 m/s | 2.1 |
| 2006 | 13.3°C | 9.2°C | 5.2°C | 21.4°C | -4.4°C | 85 mm | 81% | 0.3 m/s | 2.6 |
| 2005 | 13.0°C | 9.7°C | 6.3°C | 19.4°C | 1.0°C | 174 mm | 90% | 0.3 m/s | 2 |
| 2004 | 13.0°C | 9.6°C | 6.1°C | 23.3°C | 1.4°C | 160 mm | 87% | 0.3 m/s | 2.3 |
| 2003 | 14.4°C | 10.6°C | 6.8°C | 25.1°C | -3.7°C | 308 mm | 84% | 0.3 m/s | 2.1 |
| 2002 | 13.7°C | 9.0°C | 4.2°C | 22.7°C | -2.7°C | 32 mm | 77% | 0.4 m/s | 2.6 |
| 2001 | 10.6°C | 7.6°C | 4.5°C | 21.0°C | -1.5°C | 248 mm | 89% | 0.3 m/s | 2.2 |
| 2000 | 13.1°C | 9.0°C | 5.0°C | 19.6°C | 1.3°C | 119 mm | 85% | 0.3 m/s | 2.4 |
| 1999 | 13.5°C | 9.1°C | 4.6°C | 23.4°C | -0.4°C | 186 mm | 82% | 0.3 m/s | 2.5 |
| 1998 | 13.0°C | 9.3°C | 5.5°C | 22.1°C | 0.5°C | 157 mm | 86% | 0.3 m/s | 2.3 |
| 1997 | 11.5°C | 8.3°C | 5.2°C | 21.2°C | 0.1°C | 277 mm | 90% | 0.3 m/s | 2.1 |
| 1996 | 11.7°C | 7.9°C | 4.2°C | 23.1°C | -2.6°C | 283 mm | 88% | 0.3 m/s | 2.2 |
| 1995 | 11.4°C | 8.0°C | 4.6°C | 18.6°C | -2.7°C | 250 mm | 88% | 0.3 m/s | 2.3 |
| 1994 | 12.5°C | 8.5°C | 4.6°C | 20.9°C | 1.3°C | 229 mm | 84% | 0.3 m/s | 2.5 |
| 1993 | 15.2°C | 10.9°C | 6.6°C | 27.0°C | 2.1°C | 94 mm | 83% | 0.3 m/s | 2.4 |
| 1992 | 12.9°C | 9.3°C | 5.6°C | 21.3°C | -3.1°C | 110 mm | 86% | 0.3 m/s | 2.2 |
| 1991 | 13.4°C | 8.9°C | 4.4°C | 27.8°C | -4.7°C | 74 mm | 77% | 0.3 m/s | 2.7 |
| 1990 | 10.3°C | 7.0°C | 3.8°C | 15.1°C | -0.9°C | 315 mm | 91% | 0.3 m/s | 2.2 |
| 1989 | 13.2°C | 8.9°C | 4.6°C | 21.2°C | -2.4°C | 156 mm | 82% | 0.3 m/s | 2.3 |
| 1988 | 16.5°C | 12.0°C | 7.4°C | 26.6°C | -1.3°C | 163 mm | 82% | 0.3 m/s | 2 |
| 1987 | 18.3°C | 12.6°C | 6.9°C | 29.8°C | 2.8°C | 18 mm | 63% | 0.4 m/s | 2.9 |
| 1986 | 16.0°C | 10.9°C | 5.8°C | 20.2°C | 2.3°C | 106 mm | 78% | 0.4 m/s | 2.4 |
| 1985 | 10.6°C | 7.0°C | 3.5°C | 19.3°C | -3.3°C | 362 mm | 87% | 0.3 m/s | 2.1 |
| 1984 | 10.4°C | 6.7°C | 2.9°C | 20.4°C | -7.8°C | 182 mm | 87% | 0.3 m/s | 2 |
| 1983 | 12.7°C | 8.4°C | 4.1°C | 18.1°C | -0.2°C | 98 mm | 85% | 0.3 m/s | — |
| 1982 | 13.0°C | 8.8°C | 4.6°C | 23.9°C | -0.9°C | 177 mm | 86% | 0.3 m/s | — |
| 1981 | 12.6°C | 8.6°C | 4.6°C | 20.7°C | -0.4°C | 231 mm | 85% | 0.4 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 13°C with lows near 5.2°C (mean 9.1°C), based on 45 years of NASA POWER data.
October averages 186 mm of rainfall in Snohomish, a relatively wet time of year. The wettest on record was 385 mm in 2016.
The hottest October reached 29.8°C in 1987. The coldest dipped to -7.8°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 11.9°C to 12.7°C and overnight lows from 3.9°C to 5.4°C over the same span.
October is one of the warmer months of the year in Snohomish and a relatively wet time of year, so plan for around 13°C daytime highs and 5.2°C at night.
Not quite — October is the 7th coolest month in Snohomish, averaging 9.1°C.
For October in Snohomish, pack warm layers and a jacket for chilly mornings, with typical highs of 13°C and lows of 5.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 85% — quite humid.
Average wind speed in October is 0.3 m/s. The windiest October on record averaged 0.4 m/s (1981).
The wettest October on record was 2016 with 385 mm. On average, October sees 186 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 Snohomish 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.
