King County (Seattle)
October
Weather in King County for October 2025
Your guide to King County weather in October - trends and predictions
In general, the average temperature in King County at the beginning of October is 20 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12.1 °F by the end of October.
King County experiences heavy rainfall in October, with over 20 rainy days and an average total precipitation 134.1 mm.
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Temperatures
Rain 🌧️
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9
Dry days
22
Rainy days
0
Snow days
16°/8°
Temperatures
12 km/h
Avg max wind
74 %
Avg humidity
King County in October average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  20° | 2 18° | 3  20° | 4 19° | 5 19° | ||
| 6  22° | 7 22° | 8  21° | 9 17° | 10 16° | 11  16° | 12 19° |
| 13  20° | 14 17° | 15 19° | 16  19° | 17 16° | 18 18° | 19 19° |
| 20 17° | 21 15° | 22 14° | 23 12° | 24  12° | 25 11° | 26 12° |
| 27 12° | 28 12° | 29 12° | 30 12° | 31 14° |
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Temperatures trend during October in King County
See the weather trend as well as the moving average line
October weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Oct. 1 | Cloudy | 20° /8° | 0.2 mm | 5 | |
| Oct. 2 | Cloudy | 18° /9° | 0.3 mm | 4 | |
| Oct. 3 | Moderate rain at times | 20° /9° | 0.7 mm | 5 | |
| Oct. 4 | Cloudy | 19° /10° | 3.5 mm | 5 | |
| Oct. 5 | Moderate or heavy rain shower | 19° /10° | 1.5 mm | 5 | |
| Oct. 6 | Partly cloudy | 22° /8° | 2.9 mm | 6 | |
| Oct. 7 | Cloudy | 22° /10° | 0 mm | 5 | |
| Oct. 8 | Sunny | 21° /10° | 0.8 mm | 6 | |
| Oct. 9 | Moderate rain at times | 17° /9° | 3.1 mm | 4 | |
| Oct. 10 | Moderate or heavy rain shower | 16° /8° | 6.1 mm | 4 | |
| Oct. 11 | Patchy rain possible | 16° /7° | 2.9 mm | 4 | |
| Oct. 12 | Sunny | 19° /6° | 0.9 mm | 5 | |
| Oct. 13 | Overcast | 20° /8° | 0.5 mm | 5 | |
| Oct. 14 | Patchy rain possible | 17° /9° | 3.6 mm | 4 | |
| Oct. 15 | Moderate rain at times | 19° /10° | 3.6 mm | 5 | |
| Oct. 16 | Moderate rain | 19° /10° | 4.6 mm | 5 | |
| Oct. 17 | Patchy rain possible | 16° /8° | 1.1 mm | 4 | |
| Oct. 18 | Overcast | 18° /8° | 0 mm | 5 | |
| Oct. 19 | Sunny | 19° /8° | 0 mm | 5 | |
| Oct. 20 | Moderate rain at times | 17° /10° | 3.3 mm | 4 | |
| Oct. 21 | Patchy rain possible | 15° /8° | 5.5 mm | 4 | |
| Oct. 22 | Patchy rain possible | 14° /7° | 1.8 mm | 3 | |
| Oct. 23 | Moderate rain at times | 12° /6° | 1.2 mm | 3 | |
| Oct. 24 | Heavy rain at times | 12° /6° | 12.2 mm | 3 | |
| Oct. 25 | Moderate rain at times | 11° /5° | 6.3 mm | 3 | |
| Oct. 26 | Moderate rain at times | 12° /5° | 6.4 mm | 3 | |
| Oct. 27 | Patchy rain possible | 12° /6° | 14 mm | 3 | |
| Oct. 28 | Moderate or heavy rain shower | 12° /6° | 20.8 mm | 3 | |
| Oct. 29 | Moderate rain at times | 12° /5° | 2.6 mm | 3 | |
| Oct. 30 | Moderate or heavy rain shower | 12° /4° | 14.1 mm | 3 | |
| Oct. 31 | Overcast | 14° /4° | 9.6 mm | 4 | |
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Important Notice
Our weather forecast for King County in October is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the King County forecast closer to your planned date for the most up-to-date weather information.
King County in October - FAQ
What are the expected maximum and minimum temperatures in King County during October?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in King County during October?
Significant rainfall exceeding 134.1 mm is expected in King County during October, occurring over more than 22 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in King County during October?
The average wind speed in King County during October is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
October rainfall patterns in King County
Explore the daily rainfall trends and prepare for King Countys October weather 💧
UV exposure in King County during October
Stay informed about UV levels for safe outdoor activities throughout the month of October ☀️
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Where is King County?Get accurate weather forecasts for King County, located at latitude 47.606 and longitude -122.332. Stay updated with localized weather information tailored for King County.
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