King County Climate and Average Weather
Climate of King County: average temperatures, rainfall and seasons month by month.
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 | 77° | 60° | 1,2 in | ★★★★★ |
| September | 70° | 55° | 2,0 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).
Recent extremes in King County
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How King County compares with nearby places
Annual averages, and the difference against King County.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Area Code 206 | 0 mi | 53°F | about the same | 43 in |
| Seattle | 0 mi | 53°F | about the same | 43 in |
| ZIP Code 98101 | 0 mi | 53°F | about the same | 43 in |
| Space Needle | 1 mi | 53°F | about the same | 43 in |
| Seattle-Tacoma International Airport | 11 mi | 52°F | 33°F cooler | 51 in |
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.
What this means for King County
Today is about average for August. The forecast high of 76°F is in line with the 77°F typical for this month.
Rain is very unlikely today - plans do not need a backup.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 58°F.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- If your dates are flexible, avoid January, November and December - historically the least comfortable months here.
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 71°F (22°C) in King County with clear sky. It feels like 72°F. Today runs from 56°F to 76°F. Chance of precipitation is 0%. Sightseeing conditions score 9.7/10 - 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 about average for August. The forecast high of 76°F is in line with the 77°F typical for this month. The best window to be outside is roughly 9 AM to 12 PM, when temperature, rain chance and wind line up best. sightseeing is the strongest bet in King County today at 9.7/10. 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.
Quick facts about King County
| Type | County |
|---|---|
| State | Washington |
| Country | United States |
| Continent | North America |
| Coordinates | 47°36′22.3″N 122°19′55.6″W (47.6062, -122.3321) |
| Population | 2.270.000 |
| Local time | 3:45 AM (UTC-07:00) |
| Best months | June, July and August |
| Climate | Temperate |
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.
Explore King County
Every topic we hold for this place, and the same topic for the places around it.
Climate 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 71°F (22°C) with clear sky. Humidity is 68% and wind is 5 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 3:45 AM.
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 August 25, 2026 at 3:45 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
