Seattle Weather in December: Temperature, Precipitation, Wind
In December, Seattle has an average temperature of 7.3°C (45.1°F), with highs of 10.1°C (50.2°F) and lows of 4.5°C (40.1°F). The city experiences strong winds, with an average speed of 15.3 km/h (9.5 mph) and gusts up to 27.3 km/h (17.0 mph). The humidity is relatively high, averaging 85.2%.
What is the temperature in Seattle in December?
Average air temperature in Seattle is 7.3°C (45.1°F) in December. The outside temperature in Seattle feels like 6.4°C (43.5°F) on a typical December day. The highest average temperature during sunny days is 10.1°C (50.2°F) and feels like 9.8°C (49.7°F). The lowest average temperature after dark is 4.5°C (40.1°F) which feels like 2.7°C (36.8°F).
How hot is Seattle in December?
The hot temperature in December in Seattle rises to 16.4°C (61.5°F) on sunny days with low cloud coverage and 85.2% humidity. During hottest days of December it feels like 16.4 °C (61.5°F). The average maximum temp in Seattle is 10.1°C (61.5°F) during day time in December.
How cold is Seattle in December?
The coldest temp in Seattle in December drops to -1.3°C (29.7°F) during the cold nights. With 15.3km/h (9.5mph) winds and 85.2% humidity it feels like -4.7°C (23.5°F) on the coldest nights. The average minimum temperature is 4.5°C (40.1°F) during night time in December.
Does it rain in Seattle in December?
Yes, it rains for 18 days in Seattle, United States in December averaging 3.43 mm of precipitation. Seattle has a 58.1% chance for rain throughout the entire month of December.
How much does it rain in Seattle throughout December?
Seattle has 3.43 mm (0.13 inch) of rain per day on average in December. It rains for an average of 18 days out of the entire month.
Is Seattle windy in December?
The average speed of wind in Seattle, United States during December is 15.3km/h (9.5mph) and average windgust is 27.3km/h (17mph). On some days in December wind can reach up to 33.8km/h (21mph).
What is the direction of the wind in Seattle in December?
Most days of December the wind is blowing from South-Southeast direction in Seattle.
What are the humidity levels in Seattle in December?
The average humidity levels in Seattle in December are 85.2%. Daily humidity levels in Seattle range from 61.2% to 95.2% during December.
How many hours of daylight are in Seattle in December?
Seattle has 8 hours 30 minutes of daylight in December on average. Sunset and sunrise times gradually change throughout the month. Sunrise in Seattle in December is at 7:50:02 and the sunset is at 16:20:11.
What is the cloud coverage in Seattle in December?
Clouds cover 73.8% of the sky on average throughout December in Seattle. The cloud coverage ranges from 20.8% to 99.9% depending on the day of the month.
What is the UV level in December in Seattle?
The average UV index in Seattle is 1.8 in December. UV levels change throughout the month and range from 0 to 4.
What is the solar radiation in Seattle in December?
The average solar radiation is 29.4 W/m2 (Watts per square meter) in Seattle during December. However solar radiation levels change throughout the month and range from 5.3 W/m2 to 61.5 W/m2.
What is the solar energy during December in Seattle?
The average solar energy during December in Seattle is 2.5 MJ/m2 (megajoules per square metre). Solar energy ranges from 0.5 MJ/m2, to 5.2 MJ/m2 during December.
Are there severe weather risks in Seattle in December?
Yes, there is a 10% risk for severe weather in Seattle, United States in December.
What is the air pressure in Seattle in December?
On average the air pressure in Seattle in December is 1016.4 mb (millibars). Throughout the month the sea level pressure ranges from 1002.4 mb to 1027.2 mb.
What is the visibility in Seattle in December?
The average daylight visibility in Seattle in December is 12.5 km (7.8 miles). Depending on the precipitation the visibility ranges from 6 km (3.7 miles) to 15.9 km (9.9 miles) throughout December.
What is the dew point in Seattle in December?
The average dew point in Seattle during December is 4.8°C (40.6°F).
Where is the data for Seattle climate in December coming from?
The climate data for Seattle, Washington, United States in December is collected from the following weather stations.
- SEATTLE TACOMA AIRPORT, WA US
- RENTON MUNICIPAL AIRPORT, WA US
- SEATTLE BOEING FIELD, WA US
- FW0821 Seattle WA US
- KBFI
- KRNT
- KSEA