October is one of the warmer months of the year in Bellevue, with average highs near 13.8°C and lows around 5.4°C (mean 9.6°C). It is a relatively wet time of year, averaging 168 mm of rainfall and 82% relative humidity across the period.
October is one of the warmer months of the year in Bellevue. Across 45 years of records, the warmest October in Bellevue was 2022 — when the month averaged 14.2°C — while the coldest was 1984 at 7.1°C. Typical October days reach 13.8°C with nights near 5.4°C. The long-term October temperature trend is broadly flat.
October is a relatively wet time of year in Bellevue, averaging 168 mm of rainfall. The wettest October on record was 2016 with 332 mm, while the driest was 1987 at 14 mm.
Relative humidity in Bellevue during October averages 82%. The most humid October was 2025 at 91%, and the least humid was 1987 at 58%.
October receives about 2.3 kWh/m²/day of solar energy in Bellevue. The sunniest October was 1987 at 2.9 kWh/m²/day, and the cloudiest was 2016 at 1.8.
Average wind speed in Bellevue during October is 0.3 m/s. The windiest October was 1987 at 0.4 m/s, while the calmest were 2024 and 2025 at 0.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.9°C | 9.2°C | 9.3°C | 9.8°C | 9.7°C | -0.2°C |
| Avg High | 14.6°C | 13.4°C | 13.3°C | 13.8°C | 13.7°C | -0.9°C |
| Avg Low | 5.2°C | 5.1°C | 5.3°C | 5.8°C | 5.7°C | +0.5°C |
| Avg Rain | 144 mm | 181 mm | 150 mm | 196 mm | 163 mm | +19 mm |
October temperatures in Bellevue have risen by about 1.4°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -5.1°C (1991) to a record high of 31.9°C (1987).
Rainfall in October is a relatively wet time of year, averaging 168 mm, with a wettest year of 332 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 Bellevue
October is a good time to visit Bellevue, with days averaging 13.8°C and nights around 5.4°C (mean 9.6°C, close to Bellevue'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 | 10.6°C | 7.2°C | 3.8°C | 18.5°C | -1.1°C | 189 mm | 91% | 0.2 m/s | 2.3 |
| 2024 | 11.4°C | 7.8°C | 4.3°C | 21.7°C | 0.1°C | 160 mm | 90% | 0.2 m/s | 2.3 |
| 2023 | 15.5°C | 10.8°C | 6.1°C | 28.9°C | -3.0°C | 85 mm | 80% | 0.3 m/s | 2.5 |
| 2022 🔥 | 19.4°C | 14.2°C | 9.0°C | 29.2°C | 3.5°C | 128 mm | 72% | 0.3 m/s | 2.8 |
| 2021 | 12.0°C | 8.5°C | 5.0°C | 17.9°C | -0.6°C | 197 mm | 86% | 0.3 m/s | 2.1 |
| 2020 | 13.5°C | 9.7°C | 6.0°C | 26.2°C | -5.1°C | 222 mm | 87% | 0.3 m/s | 2.5 |
| 2019 | 11.5°C | 7.4°C | 3.2°C | 16.4°C | -3.7°C | 178 mm | 80% | 0.3 m/s | 2.5 |
| 2018 | 15.3°C | 10.6°C | 5.8°C | 24.3°C | 1.4°C | 145 mm | 78% | 0.3 m/s | 2.5 |
| 2017 | 13.6°C | 9.2°C | 4.8°C | 21.0°C | 0.7°C | 216 mm | 82% | 0.3 m/s | 2.6 |
| 2016 🌧️ | 12.7°C | 9.3°C | 5.9°C | 17.3°C | 1.4°C | 332 mm | 88% | 0.3 m/s | 1.8 |
| 2015 | 16.5°C | 12.5°C | 8.6°C | 25.0°C | 5.0°C | 215 mm | 81% | 0.3 m/s | 2.1 |
| 2014 | 15.6°C | 12.0°C | 8.5°C | 24.2°C | 4.5°C | 225 mm | 86% | 0.3 m/s | 2.1 |
| 2013 | 13.6°C | 9.0°C | 4.5°C | 20.3°C | 0.1°C | 60 mm | 83% | 0.3 m/s | 2.6 |
| 2012 | 13.7°C | 9.6°C | 5.5°C | 25.5°C | 0.7°C | 265 mm | 83% | 0.3 m/s | 2.3 |
| 2011 | 12.1°C | 8.7°C | 5.3°C | 17.6°C | -0.1°C | 162 mm | 88% | 0.3 m/s | 2.1 |
| 2010 | 13.8°C | 9.9°C | 6.1°C | 22.2°C | 0.4°C | 161 mm | 84% | 0.3 m/s | 2.4 |
| 2009 | 12.0°C | 8.2°C | 4.3°C | 16.7°C | -0.2°C | 228 mm | 80% | 0.3 m/s | 2.1 |
| 2008 | 13.2°C | 9.1°C | 5.0°C | 27.6°C | 0.5°C | 89 mm | 81% | 0.3 m/s | 2.3 |
| 2007 | 12.0°C | 8.1°C | 4.3°C | 22.6°C | -0.6°C | 169 mm | 88% | 0.3 m/s | 2.1 |
| 2006 | 13.8°C | 9.7°C | 5.5°C | 22.8°C | -4.4°C | 84 mm | 79% | 0.3 m/s | 2.6 |
| 2005 | 13.7°C | 10.1°C | 6.4°C | 20.8°C | 1.0°C | 160 mm | 88% | 0.3 m/s | 2 |
| 2004 | 13.9°C | 10.0°C | 6.1°C | 25.7°C | 1.3°C | 148 mm | 85% | 0.3 m/s | 2.3 |
| 2003 | 15.2°C | 10.9°C | 6.6°C | 27.6°C | -4.1°C | 248 mm | 82% | 0.3 m/s | 2.1 |
| 2002 | 14.5°C | 9.6°C | 4.6°C | 24.0°C | -4.0°C | 32 mm | 72% | 0.3 m/s | 2.6 |
| 2001 | 11.5°C | 8.2°C | 4.9°C | 22.5°C | -0.2°C | 231 mm | 86% | 0.3 m/s | 2.2 |
| 2000 | 13.5°C | 9.2°C | 4.9°C | 20.7°C | 0.2°C | 114 mm | 83% | 0.3 m/s | 2.4 |
| 1999 | 14.6°C | 9.7°C | 4.9°C | 24.8°C | -1.3°C | 147 mm | 79% | 0.3 m/s | 2.5 |
| 1998 | 13.6°C | 9.5°C | 5.4°C | 23.3°C | -0.2°C | 137 mm | 84% | 0.3 m/s | 2.3 |
| 1997 | 11.8°C | 8.5°C | 5.2°C | 21.7°C | 1.7°C | 250 mm | 90% | 0.3 m/s | 2.1 |
| 1996 | 12.7°C | 8.7°C | 4.8°C | 26.4°C | -1.7°C | 254 mm | 85% | 0.3 m/s | 2.2 |
| 1995 | 12.1°C | 8.4°C | 4.6°C | 22.5°C | -2.9°C | 231 mm | 86% | 0.3 m/s | 2.3 |
| 1994 | 13.4°C | 9.0°C | 4.7°C | 23.6°C | 0.6°C | 240 mm | 82% | 0.3 m/s | 2.5 |
| 1993 | 15.8°C | 11.3°C | 6.8°C | 28.1°C | 3.5°C | 87 mm | 81% | 0.3 m/s | 2.4 |
| 1992 | 14.0°C | 9.8°C | 5.7°C | 21.6°C | -2.7°C | 99 mm | 82% | 0.3 m/s | 2.2 |
| 1991 | 14.6°C | 9.7°C | 4.8°C | 29.9°C | -5.1°C | 78 mm | 72% | 0.3 m/s | 2.7 |
| 1990 | 11.2°C | 7.5°C | 3.9°C | 16.8°C | -0.1°C | 288 mm | 89% | 0.3 m/s | 2.2 |
| 1989 | 13.9°C | 9.3°C | 4.7°C | 23.0°C | -1.5°C | 123 mm | 80% | 0.3 m/s | 2.3 |
| 1988 | 17.8°C | 12.7°C | 7.6°C | 29.0°C | 0.1°C | 154 mm | 80% | 0.3 m/s | 2 |
| 1987 | 19.5°C | 13.5°C | 7.5°C | 31.9°C | 3.0°C | 14 mm | 58% | 0.4 m/s | 2.9 |
| 1986 | 17.0°C | 11.7°C | 6.4°C | 21.6°C | 3.7°C | 99 mm | 74% | 0.3 m/s | 2.4 |
| 1985 | 11.3°C | 7.5°C | 3.7°C | 20.3°C | -2.1°C | 316 mm | 85% | 0.3 m/s | 2.1 |
| 1984 ❄️ | 11.1°C | 7.1°C | 3.1°C | 23.2°C | -4.8°C | 169 mm | 84% | 0.3 m/s | 2 |
| 1983 | 13.5°C | 8.8°C | 4.1°C | 19.5°C | -1.1°C | 82 mm | 82% | 0.3 m/s | — |
| 1982 | 13.5°C | 9.2°C | 4.9°C | 23.2°C | -0.3°C | 164 mm | 83% | 0.3 m/s | — |
| 1981 | 13.4°C | 9.1°C | 4.8°C | 22.0°C | -0.4°C | 177 mm | 83% | 0.3 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 13.8°C with lows near 5.4°C (mean 9.6°C), based on 45 years of NASA POWER data.
October averages 168 mm of rainfall in Bellevue, a relatively wet time of year. The wettest on record was 332 mm in 2016.
The hottest October reached 31.9°C in 1987. The coldest dipped to -5.1°C in 1991.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1.4°C. Daytime highs moved from 12.6°C to 13.8°C and overnight lows from 4.1°C to 5.6°C over the same span.
October is one of the warmer months of the year in Bellevue and a relatively wet time of year, so plan for around 13.8°C daytime highs and 5.4°C at night.
Not quite — October is the 7th coolest month in Bellevue, averaging 9.6°C.
For October in Bellevue, pack warm layers and a jacket for chilly mornings, with typical highs of 13.8°C and lows of 5.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 82% — quite humid.
Average wind speed in October is 0.3 m/s. The windiest October on record averaged 0.4 m/s (1987).
The wettest October on record was 2016 with 332 mm. On average, October sees 168 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 Bellevue 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.
