October is one of the warmer months of the year in Olympia, with average highs near 15.1°C and lows around 6.5°C (mean 10.8°C). It is a relatively wet time of year, averaging 166 mm of rainfall and 88% relative humidity across the period.
October is one of the warmer months of the year in Olympia. Across 45 years of records, the warmest October in Olympia was 2022 — when the month averaged 14.3°C — while the coldest was 1984 at 8.8°C. Typical October days reach 15.1°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 Olympia, averaging 166 mm of rainfall. The wettest October on record was 2016 with 434 mm, while the driest was 1987 at 21 mm.
Relative humidity in Olympia during October averages 88%. The most humid October was 2016 at 94%, and the least humid was 1987 at 71%.
October receives about 2.3 kWh/m²/day of solar energy in Olympia. The sunniest October was 1987 at 2.9 kWh/m²/day, and the cloudiest was 2016 at 1.8.
Average wind speed in Olympia during October is 0.3 m/s. The windiest Octobers were 2020, 2022 and 2023, among others at 0.3 m/s, while the calmest were 2021, 2024 and 2025, among others at 0.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.9°C | 10.4°C | 10.6°C | 11.0°C | 11.2°C | +0.3°C |
| Avg High | 15.7°C | 14.7°C | 14.8°C | 15.1°C | 15.2°C | -0.5°C |
| Avg Low | 6.2°C | 6.2°C | 6.5°C | 7.0°C | 7.2°C | +1°C |
| Avg Rain | 154 mm | 168 mm | 144 mm | 205 mm | 152 mm | -2 mm |
October temperatures in Olympia have risen by about 1.3°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -3.8°C (1991) to a record high of 29.3°C (1988).
Rainfall in October is a relatively wet time of year, averaging 166 mm, with a wettest year of 434 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.3°C per decade, narrowing the gap between day and night.
A good time to visit Olympia
October is a good time to visit Olympia, with days averaging 15.1°C and nights around 6.5°C (mean 10.8°C, close to Olympia'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 | 12.9°C | 9.5°C | 6.1°C | 22.0°C | 0.9°C | 175 mm | 93% | 0.2 m/s | 2.3 |
| 2024 | 13.3°C | 9.9°C | 6.6°C | 19.4°C | 4.0°C | 170 mm | 93% | 0.2 m/s | 2.3 |
| 2023 | 16.3°C | 11.7°C | 7.0°C | 26.2°C | -1.7°C | 118 mm | 89% | 0.3 m/s | 2.5 |
| 2022 🔥 | 19.5°C | 14.3°C | 9.1°C | 29.1°C | 4.9°C | 115 mm | 83% | 0.3 m/s | 2.8 |
| 2021 | 13.6°C | 10.3°C | 7.0°C | 18.3°C | 2.9°C | 213 mm | 91% | 0.2 m/s | 2.1 |
| 2020 | 15.5°C | 11.3°C | 7.1°C | 23.6°C | -1.2°C | 124 mm | 89% | 0.3 m/s | 2.5 |
| 2019 | 13.4°C | 9.1°C | 4.7°C | 19.3°C | -3.0°C | 138 mm | 86% | 0.3 m/s | 2.5 |
| 2018 | 15.7°C | 11.1°C | 6.5°C | 24.8°C | 3.4°C | 150 mm | 87% | 0.3 m/s | 2.5 |
| 2017 | 15.1°C | 10.6°C | 6.1°C | 20.4°C | 2.9°C | 195 mm | 87% | 0.3 m/s | 2.6 |
| 2016 🌧️ | 13.8°C | 10.9°C | 8.0°C | 16.7°C | 2.8°C | 434 mm | 94% | 0.2 m/s | 1.8 |
| 2015 | 17.6°C | 13.4°C | 9.3°C | 26.5°C | 6.1°C | 203 mm | 88% | 0.3 m/s | 2.1 |
| 2014 | 16.9°C | 13.2°C | 9.4°C | 25.1°C | 6.2°C | 257 mm | 91% | 0.3 m/s | 2.1 |
| 2013 | 14.8°C | 10.0°C | 5.3°C | 19.1°C | 2.1°C | 46 mm | 88% | 0.3 m/s | 2.6 |
| 2012 | 14.7°C | 10.9°C | 7.1°C | 24.1°C | 2.8°C | 273 mm | 88% | 0.2 m/s | 2.3 |
| 2011 | 13.8°C | 10.2°C | 6.6°C | 20.2°C | 2.6°C | 140 mm | 92% | 0.3 m/s | 2.1 |
| 2010 | 14.7°C | 10.7°C | 6.7°C | 20.5°C | 1.4°C | 218 mm | 90% | 0.3 m/s | 2.4 |
| 2009 | 14.2°C | 10.1°C | 6.1°C | 18.1°C | 0.9°C | 223 mm | 86% | 0.2 m/s | 2.1 |
| 2008 | 13.9°C | 9.9°C | 5.9°C | 22.9°C | 0.3°C | 105 mm | 88% | 0.3 m/s | 2.3 |
| 2007 | 13.3°C | 9.4°C | 5.5°C | 22.1°C | 0.1°C | 161 mm | 92% | 0.3 m/s | 2.1 |
| 2006 | 15.7°C | 11.0°C | 6.3°C | 22.4°C | -3.6°C | 60 mm | 84% | 0.3 m/s | 2.6 |
| 2005 | 14.4°C | 11.0°C | 7.6°C | 21.2°C | 2.6°C | 178 mm | 93% | 0.3 m/s | 2 |
| 2004 | 15.3°C | 11.3°C | 7.4°C | 23.8°C | 2.3°C | 155 mm | 90% | 0.3 m/s | 2.3 |
| 2003 | 16.0°C | 12.1°C | 8.1°C | 24.6°C | -1.6°C | 266 mm | 89% | 0.3 m/s | 2.1 |
| 2002 | 16.3°C | 10.9°C | 5.5°C | 23.4°C | -3.2°C | 23 mm | 80% | 0.3 m/s | 2.6 |
| 2001 | 13.7°C | 9.8°C | 6.0°C | 23.5°C | -0.2°C | 155 mm | 89% | 0.3 m/s | 2.2 |
| 2000 | 14.8°C | 10.5°C | 6.2°C | 22.3°C | 2.2°C | 115 mm | 89% | 0.3 m/s | 2.4 |
| 1999 | 15.3°C | 10.6°C | 5.9°C | 23.3°C | 1.8°C | 142 mm | 86% | 0.3 m/s | 2.5 |
| 1998 | 14.7°C | 10.7°C | 6.7°C | 25.3°C | 1.9°C | 137 mm | 90% | 0.3 m/s | 2.3 |
| 1997 | 13.8°C | 10.2°C | 6.7°C | 20.1°C | 1.7°C | 277 mm | 92% | 0.3 m/s | 2.1 |
| 1996 | 14.0°C | 9.8°C | 5.7°C | 23.9°C | -0.7°C | 224 mm | 90% | 0.3 m/s | 2.2 |
| 1995 | 14.0°C | 10.0°C | 6.0°C | 19.9°C | -3.0°C | 192 mm | 90% | 0.3 m/s | 2.3 |
| 1994 | 14.6°C | 10.1°C | 5.6°C | 23.6°C | 2.6°C | 220 mm | 86% | 0.3 m/s | 2.5 |
| 1993 | 16.8°C | 12.0°C | 7.2°C | 26.3°C | 3.8°C | 73 mm | 87% | 0.3 m/s | 2.4 |
| 1992 | 15.4°C | 11.2°C | 6.9°C | 20.9°C | -0.6°C | 121 mm | 87% | 0.2 m/s | 2.2 |
| 1991 | 15.5°C | 10.5°C | 5.4°C | 26.3°C | -3.8°C | 63 mm | 81% | 0.3 m/s | 2.7 |
| 1990 | 13.2°C | 9.3°C | 5.5°C | 18.2°C | 2.4°C | 231 mm | 91% | 0.3 m/s | 2.2 |
| 1989 | 15.2°C | 10.7°C | 6.2°C | 22.4°C | -0.3°C | 137 mm | 86% | 0.3 m/s | 2.3 |
| 1988 | 17.6°C | 12.9°C | 8.1°C | 29.3°C | 0.9°C | 97 mm | 88% | 0.3 m/s | 2 |
| 1987 | 20.0°C | 13.5°C | 7.1°C | 28.7°C | 3.1°C | 21 mm | 71% | 0.3 m/s | 2.9 |
| 1986 | 17.7°C | 12.2°C | 6.7°C | 22.0°C | 2.7°C | 140 mm | 83% | 0.3 m/s | 2.4 |
| 1985 | 13.5°C | 9.3°C | 5.2°C | 20.2°C | -2.3°C | 297 mm | 88% | 0.3 m/s | 2.1 |
| 1984 ❄️ | 12.6°C | 8.8°C | 5.0°C | 21.5°C | -2.7°C | 189 mm | 89% | 0.3 m/s | 2 |
| 1983 | 14.8°C | 10.0°C | 5.3°C | 18.4°C | 1.7°C | 72 mm | 87% | 0.3 m/s | — |
| 1982 | 15.1°C | 10.7°C | 6.4°C | 23.9°C | 0.1°C | 205 mm | 88% | 0.3 m/s | — |
| 1981 | 14.6°C | 10.2°C | 5.8°C | 21.0°C | 0.8°C | 230 mm | 88% | 0.3 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 15.1°C with lows near 6.5°C (mean 10.8°C), based on 45 years of NASA POWER data.
October averages 166 mm of rainfall in Olympia, a relatively wet time of year. The wettest on record was 434 mm in 2016.
The hottest October reached 29.3°C in 1988. The coldest dipped to -3.8°C in 1991.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1.3°C. Daytime highs moved from 14.1°C to 15.1°C and overnight lows from 5.5°C to 7.2°C over the same span.
October is one of the warmer months of the year in Olympia and a relatively wet time of year, so plan for around 15.1°C daytime highs and 6.5°C at night.
Not quite — October is the 7th coolest month in Olympia, averaging 10.8°C.
For October in Olympia, pack warm layers and a jacket for chilly mornings, with typical highs of 15.1°C and lows of 6.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 88% — quite humid.
Average wind speed in October is 0.3 m/s. The windiest October on record averaged 0.3 m/s (1981).
The wettest October on record was 2016 with 434 mm. On average, October sees 166 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 Olympia 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.
