Seattle Weather in October
United States · Oceanic climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
October in Seattle sees average temperatures ranging from a low of 9.3°C (48.7°F) to a high of 15.4°C (59.7°F), with a mean of 12.0°C (53.6°F). Compared to the annual average of 11.3°C (52.3°F), this month is 0.7°C warmer than the yearly norm. Precipitation averages 107.1mm, making it approximately 10.0mm wetter than the monthly average of 97.0mm. The city receives an average of 6.4 hours of sunshine per day during October, with relative humidity averaging 82.1%. Wind speeds reach an average maximum of 19.4 km/h. For travelers, this month offers a temperature experience in Seattle, with wetter-than-average conditions compared to the rest of the year.
Seattle's reputation for rain is exaggerated but not entirely wrong. The city receives about 950mm of annual precipitation, but the rain comes as frequent light drizzle rather than heavy downpours. I've tracked the data and found that the summer months from July to September are remarkably dry and pleasant, with temperatures around 22°C. The best time for visiting is clearly August, when the city is at its sunniest.
October vs Adjacent Months
| Metric | September | October | November |
|---|---|---|---|
| Mean Temp | 16.5°C (61.7°F) | 12.0°C (53.6°F) | 7.5°C (45.5°F) |
| Rainfall | 60.7mm | 107.1mm | 171.0mm |
| Sunshine | 9.2 hrs | 6.4 hrs | 4.5 hrs |
| Humidity | 75.6% | 82.1% | 83.1% |
| Wind | 18.0 km/h | 19.4 km/h | 21.7 km/h |
| Rainy Days | 12.4 | 16.6 | 20.6 |
| Snowfall | 0.0 cm | 0.0 cm | 3.4 cm |
Seasonal Context
October falls in Autumn in the Northern Hemisphere. Autumn sees temperatures gradually cooling from summer highs. For travelers visiting Seattle in October, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Seattle in October?
The average temperature in Seattle during October ranges from 9.3°C (48.7°F) to 15.4°C (59.7°F), with a mean of 12.0°C (53.6°F).
How much does it rain in Seattle in October?
Seattle receives an average of 107.1mm of precipitation in October, spread across approximately 16.6 rainy days.
What should I pack for Seattle in October?
Based on October weather data, pack warm layers, a medium jacket, and waterproof outerwear. Rain gear is essential — this month averages 107.1mm of precipitation.
Is October a good time to visit Seattle?
October is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Seattle
Cities with Similar October Climate (Oceanic)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 47.61°, -122.33°. Timezone: America/Los_Angeles. Last updated: 2026-07-30.