King County (Seattle)
May
Weather in King County for May 2025
Your guide to King County weather in May - trends and predictions
In general, the average temperature in King County at the beginning of May is 14.6 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 18.3 °F by the end of May.
King County sees moderate rainfall in May, averaging 6 rainy days.
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25
Dry days
6
Rainy days
0
Snow days
22°/7°
Temperatures
13 km/h
Avg max wind
69 %
Avg humidity
King County in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  14° | 2 19° | 3  21° | 4  13° | |||
| 5  10° | 6 12° | 7 13° | 8 16° | 9 19° | 10  24° | 11 24° |
| 12 25° | 13 20° | 14 24° | 15 27° | 16 22° | 17 23° | 18 21° |
| 19 21° | 20 23° | 21 14° | 22 15° | 23 18° | 24 20° | 25 19° |
| 26 20° | 27 21° | 28  16° | 29 17° | 30 17° | 31 18° |
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Temperatures trend during May in King County
See the weather trend as well as the moving average line
May weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 | Overcast | 14° /5° | 0.6 mm | 3 | |
| May 2 | Overcast | 19° /4° | 0.2 mm | 5 | |
| May 3 | Partly cloudy | 21° /6° | 2.5 mm | 5 | |
| May 4 | Patchy rain possible | 13° /8° | 2.5 mm | 4 | |
| May 5 | Moderate or heavy rain shower | 10° /6° | 12.3 mm | 3 | |
| May 6 | Patchy rain possible | 12° /6° | 3.4 mm | 3 | |
| May 7 | Patchy rain possible | 13° /5° | 0.5 mm | 3 | |
| May 8 | Patchy rain possible | 16° /4° | 0.2 mm | 4 | |
| May 9 | Patchy rain possible | 19° /6° | 0.1 mm | 5 | |
| May 10 | Sunny | 24° /7° | 0 mm | 7 | |
| May 11 | Overcast | 24° /9° | 0 mm | 6 | |
| May 12 | Partly cloudy | 25° /8° | 0 mm | 7 | |
| May 13 | Sunny | 20° /9° | 1.3 mm | 5 | |
| May 14 | Sunny | 24° /10° | 0 mm | 6 | |
| May 15 | Patchy rain possible | 27° /11° | 0.2 mm | 7 | |
| May 16 | Sunny | 22° /11° | 0.4 mm | 6 | |
| May 17 | Sunny | 23° /10° | 0.5 mm | 6 | |
| May 18 | Sunny | 21° /10° | 2.6 mm | 5 | |
| May 19 | Sunny | 21° /8° | 0.2 mm | 6 | |
| May 20 | Sunny | 23° /8° | 0 mm | 6 | |
| May 21 | Patchy rain possible | 14° /9° | 10.9 mm | 4 | |
| May 22 | Patchy rain possible | 15° /7° | 8.5 mm | 4 | |
| May 23 | Overcast | 18° /7° | 0.5 mm | 4 | |
| May 24 | Overcast | 20° /6° | 0 mm | 6 | |
| May 25 | Sunny | 19° /7° | 2.7 mm | 5 | |
| May 26 | Sunny | 20° /9° | 0.5 mm | 5 | |
| May 27 | Overcast | 21° /8° | 0 mm | 6 | |
| May 28 | Cloudy | 16° /8° | 1.2 mm | 4 | |
| May 29 | Patchy rain possible | 17° /7° | 2.8 mm | 4 | |
| May 30 | Patchy rain possible | 17° /7° | 0.4 mm | 4 | |
| May 31 | Patchy rain possible | 18° /6° | 0.1 mm | 4 | |
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Important Notice
Our weather forecast for King County in May 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 May - FAQ
What are the expected maximum and minimum temperatures in King County during May?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in King County during May?
Moderate rainfall is anticipated in King County during May, with a total of 96 mm spread over approximately 6 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in King County during May?
The average wind speed in King County during May is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in King County
Explore the daily rainfall trends and prepare for King Countys May weather 💧
UV exposure in King County during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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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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