King County Weather Forecast
King County weather: 64°F, mainly clear. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Summary
King County is a county in Washington. King County is a county in the United States. It has a population of about 2.3 million.
Right now it is 64°F (18°C) in King County with mainly clear. It feels like 66°F. Today runs from 49°F to 64°F. Chance of precipitation is 0%. Sightseeing conditions score 9.9/10 - excellent - go now.
The best time to visit King County is June, July and August. The climate is temperate. January, November and December tend to be the least comfortable months. July is the warmest month with average highs near 78°F, while January is the coldest with lows near 37°F.
The closest major airport is Seattle-Tacoma International Airport (SEA), about 11 mi away. Nearby highlights include Space Needle, Deception Pass State Park, Mount Rainier National Park and Mount Rainier.
In plain terms. Today is slightly warmer than average for October. The forecast high of 64°F is 4.9°F above the 59°F typical for this month. The best window to be outside is roughly 3 PM to 6 PM, when temperature, rain chance and wind line up best. sightseeing is the strongest bet in King County today at 9.9/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Weather in King County right now
Wear sunglasses and use SPF 30+ if you are outside for long.
Source: Open-Meteo. Updated 8:21 PM, Oct 4 local time.
See the King County forecast by time range
Next 24 hours
Hour-by-hour temperature, precipitation chance and wind.
16-day forecast for King County
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Sun, Oct 4 | 🌥️ Fog | 64° / 49° | 0% | 5 mph | 4 |
| Mon, Oct 5 | ☁️ Overcast | 65° / 49° | 1% | 6 mph | 4 |
| Tue, Oct 6 | ☁️ Overcast | 66° / 49° | 0% | 8 mph | 4 |
| Wed, Oct 7 | ⛅ Partly cloudy | 68° / 50° | 0% | 8 mph | 4 |
| Thu, Oct 8 | ☁️ Overcast | 70° / 51° | 1% | 7 mph | 4 |
| Fri, Oct 9 | ☁️ Overcast | 71° / 52° | 28% | 6 mph | 3 |
| Sat, Oct 10 | 🌦️ Drizzle | 59° / 49° | 31% · 0,2 in | 7 mph | 1 |
| Sun, Oct 11 | 🌤️ Mainly clear | 61° / 45° | 6% | 8 mph | 4 |
| Mon, Oct 12 | ☁️ Overcast | 64° / 44° | 6% | 8 mph | 4 |
| Tue, Oct 13 | 🌤️ Mainly clear | 65° / 44° | 23% | 5 mph | 4 |
| Wed, Oct 14 | ☁️ Overcast | 66° / 44° | 18% | 7 mph | 3 |
| Thu, Oct 15 | ☁️ Overcast | 67° / 46° | 4% | 6 mph | 3 |
| Fri, Oct 16 | ☁️ Overcast | 64° / 49° | 6% | 10 mph | 3 |
| Sat, Oct 17 | ☁️ Overcast | 65° / 48° | 3% | 9 mph | 3 |
| Sun, Oct 18 | ☀️ Clear sky | 74° / 47° | 16% | 4 mph | 3 |
| Mon, Oct 19 | ☀️ Clear sky | 74° / 50° | 17% | 4 mph | 3 |
Climate in King County month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 46° | 37° | 5,6 in | ★★☆☆☆ |
| February | 48° | 38° | 4,3 in | ★★★☆☆ |
| March | 52° | 41° | 5,6 in | ★★★☆☆ |
| April | 58° | 44° | 2,4 in | ★★★★☆ |
| May | 65° | 49° | 1,9 in | ★★★★☆ |
| June | 71° | 55° | 1,3 in | ★★★★★ |
| July | 78° | 58° | 0,5 in | ★★★★★ |
| August | 76° | 59° | 1,3 in | ★★★★★ |
| September | 69° | 56° | 1,7 in | ★★★★☆ |
| October | 59° | 48° | 4,1 in | ★★★☆☆ |
| November | 51° | 43° | 6,1 in | ★★☆☆☆ |
| December | 49° | 41° | 8,6 in | ★★☆☆☆ |
Climate type: Temperate. Source: Open-Meteo archive (ERA5).
Weather map for King County
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Air quality and pollen in King County
Air quality: Open-Meteo (CAMS). US AQI scale.
Sun, twilight and moon
Golden and blue hour are the standard photographic approximation around sunrise and sunset.
Best time to visit King County
Go in June, July and August. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, November and December - expect the least comfortable mix of heat, cold or rain.
Explore King County
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is King County?
King County is a county in Washington. Its coordinates are 47.6062, -122.3321. It lies in North America.
What is the weather like in King County right now?
It is currently 64°F (18°C) with mainly clear. Humidity is 84% and wind is 2 mph.
When is the best time to visit King County?
June, July and August offer the most comfortable conditions in King County, which has a temperate climate. January, November and December are usually the hardest months for outdoor plans.
What time zone is King County in?
King County observes America/Los_Angeles (UTC-07:00). The local time is 8:21 PM.
How many people live in King County?
King County has a population of approximately 2.3 million.
What is the nearest airport to King County?
The closest airports are Seattle-Tacoma International Airport (SEA), 11 mi away, Vancouver International Airport (YVR), 117 mi away and Portland International Airport (PDX), 140 mi away.
What are the top things to do in King County?
Popular options include Space Needle, Deception Pass State Park, Mount Rainier National Park, Mount Rainier, Olympic National Park and North Cascades National Park.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (us-counties) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated October 4, 2026 at 8:21 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
