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United States weather

Weather in King County, Washington for March 2026

Your guide to King County weather in March - trends and predictions

    Official Weather Alert ⚠️

  • Flood Warning - See hour by hour.

    • Snow Forecast ❄️

  • With an average of 4 snowy days, King County usually enjoys a light touch of snow in March.
    According to King County snow forecast for March 2026, 2 snowy days are expected until the end of the month. The closest date with snow is Sunday, March 29.

    • Temperatures

  • Until now, March 2026 in King County is slightly cooler than the historical average by -0.9 °F.

  • The forecast for the next days in King County predicts temperatures to be around 11 °F, close to the historical average.

  • In general, the average temperature in King County at the beginning of March is 9.1 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 11 °F by the end of March.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
4
Dry days
Average rainy days
23
Rainy days
Average snowy days
4
Snow days
Average temperatures
11°/3°
Temperatures
Average wind speed
13 km/h
Avg max wind
Average humidity
77 %
Avg humidity

King County Weather March

Move between months or click on a day
February
April
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Overcast
11°
2
Patchy rain possible
9°
3
Partly cloudy
8°
4
Heavy rain at times
9°
5
Overcast
9°
6
Moderate rain at times
9°
7
Moderate rain at times
9°
8
Overcast
10°
9
Overcast
10°
10
Overcast
8°
11
Overcast
10°
12
Partly cloudy
12°
13
Patchy rain possible
10°
14
Moderate or heavy rain shower
10°
15
Patchy rain possible
11°
16
Partly cloudy
12°
17
Overcast
13°
18
Moderate or heavy rain shower
13°
19
Heavy rain at times
13°
20
Moderate rain at times
11°
21
Moderate rain at times
9°
22
Weather Alert Overcast
9°
23
Cloudy
10°
24
Heavy rain
8°
25
Patchy rain possible
10°
26
Patchy rain possible
11°
27
Partly cloudy
12°
28
Overcast
14°
29
Patchy rain possible
10°
30
Patchy rain possible
9°
31
Cloudy
11°

Temperatures trend during March in King County

See the weather trend as well as the moving average line

March weather in King County day by day

Click on a date for more information
February April
Date Weather Temperatures Rain Snow More
Mar. 1 Overcast
Overcast
 11° /2° 2.3 mm 0.8 cm
Mar. 2 Patchy rain possible
Patchy rain possible
 9° /2° 1.4 mm 0 cm
Mar. 3 Partly cloudy
Partly cloudy
 8° /3° 4.2 mm 0.1 cm
Mar. 4 Heavy rain at times
Heavy rain at times
 9° /2° 5 mm 0.2 cm
Mar. 5 Overcast
Overcast
 9° /2° 3.4 mm 0 cm
Mar. 6 Moderate rain at times
Moderate rain at times
 9° /1° 5.7 mm 0 cm
Mar. 7 Moderate rain at times
Moderate rain at times
 9° /2° 1.7 mm 0 cm
Mar. 8 Overcast
Overcast
 10° /2° 3.7 mm 0 cm
Mar. 9 Overcast
Overcast
 10° /1° 7.4 mm 0 cm
Mar. 10 Overcast
Overcast
 8° /1° 4 mm 0.1 cm
Mar. 11 Overcast
Overcast
 10° /2° 3.1 mm 0 cm
Mar. 12 Partly cloudy
Partly cloudy
 12° /2° 5 mm 0 cm
Mar. 13 Patchy rain possible
Patchy rain possible
 10° /2° 11.9 mm 2.3 cm
Mar. 14 Moderate or heavy rain shower
Moderate or heavy rain shower
 10° /2° 8 mm 0 cm
Mar. 15 Patchy rain possible
Patchy rain possible
 11° /2° 4.3 mm 0 cm
Mar. 16 Partly cloudy
Partly cloudy
 12° /3° 4.8 mm 0 cm
Mar. 17 Overcast
Overcast
 13° /4° 3.3 mm 0 cm
Mar. 18 Moderate or heavy rain shower
Moderate or heavy rain shower
 13° /4° 5.7 mm 0 cm
Mar. 19 Heavy rain at times
Heavy rain at times
 13° /5° 4.8 mm 0 cm
Mar. 20 Moderate rain at times
Moderate rain at times
 11° /4° 5.8 mm 0 cm
Mar. 21 Moderate rain at times
Moderate rain at times
 9° /4° 6.9 mm 0 cm
Mar. 22 Overcast
Overcast
 9° /3° 0 mm 0 cm
Mar. 23 Cloudy
Cloudy
 10° /1° 0 mm 0 cm
Mar. 24 Heavy rain
Heavy rain
 8° /3° 29.4 mm 0 cm
Mar. 25 Patchy rain possible
Patchy rain possible
 10° /4° 1.9 mm 0 cm
Mar. 26 Patchy rain possible
Patchy rain possible
 11° /0° 0.3 mm 0 cm
Mar. 27 Partly cloudy
Partly cloudy
 12° /2° 0 mm 0 cm
Mar. 28 Overcast
Overcast
 14° /4° 0.1 mm 0 cm
Mar. 29 Patchy rain possible
Patchy rain possible
 10° /3° 0.7 mm 0.1 cm
Mar. 30 Patchy rain possible
Patchy rain possible
 9° /3° 1.6 mm 0 cm
Mar. 31 Cloudy
Cloudy
 11° /0° 0 mm 0 cm
Next
Important Notice
Our weather forecast for King County in March 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.
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King County in March - FAQ

What are the expected maximum and minimum temperatures in King County during March?

Prepare for cooler days with highs just around 11° and colder nights, dipping below 3°.

How much rainfall should be expected in King County during March?

Significant rainfall exceeding 131 mm is expected in King County during March, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.

Will it snow in King County in March 2026?

King County experiences an average snowfall of 2.808 cm during March, occurring over 4 days.

What are the typical wind conditions in King County during March?

The average wind speed in King County during March is 13 km/h, suggesting breezy to windy conditions, depending on your activities.

King County snow forecast March 2026

Track daily snowfall levels and discover King County’s snowy potential this March ❄️
On average, King County sees 4 snowy days during March, with approximately 2.8 cm of total snowfall.

March rainfall patterns in King County

Explore the daily rainfall trends and prepare for King Countys March weather 💧
Typically, King County has 23 rainy days in March with a total of 131 mm of rainfall.
Top locations in King County
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Seattle
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Location coordinates 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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