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Seattle in October: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Seattle in October is climatically mixed. The average daily high is around 15 °C, and the sea is about 10 °C. With about 15 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
33/100 · #6
Warmth
#6
Dryness
#6
Sun
#8
Sea warmth
#5
Published best categories: none
Seattle · OctoberPhoto: Daniel Schwen · CC BY-SA 4.0Climate facts
- Average high
- 15 °C
- Average low
- 7 °C
- Sea
- 10 °C
- Rainy days (est.)
- 15 rainy days (est.)
- Sun (est.)
- 3 h/day
- Humidity
- 84 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| September | 21 | 11 | 9 | 55 | 5.0 | 78 | 0.6 | 11 | 63 |
| October (selected) | 15 | 7 | 15 | 121 | 2.9 | 84 | 0.8 | 10 | 33 |
| November | 10 | 4 | 20 | 192 | 1.5 | 89 | 0.9 | 9 | 15 |
How do the previous and next months compare?
Baseline: October (33/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| September | +30 | +5.6 °C | +3.7 °C | -6.4 | -66.4 mm | +2.1 h | -5.9 % | -0.1 m/s | +1.2 °C |
| November | -18 | -5.2 °C | -3.3 °C | +4.7 | +70.7 mm | -1.4 h | +5.4 % | +0.1 m/s | -0.8 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Seattle in October?
The average daily high is around 15 °C, with an average daily low of about 7 °C.
Can you swim in Seattle in October?
The sea is about 10 °C (cold).
Does it rain a lot in Seattle in October?
The curated estimate is about 15 rainy days per month, not a directly measured long-term average. Total precipitation averages around 121 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Seattle?
By the climate score, July, August and September are the strongest months for Seattle. For a beach trip: July and August. October is not among them.