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50° 46° 42° 38° 34° Dec. *1 *2 *3 *4 *5 *6 *7 *8 *9 *10 *11 *12 *13 *14 *15 *16 *17 *18 *19 *20 *21 *22 *23 *24 *25 *26 *27 *28 *29 *30 *31. Avg. Hi.
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- Precipitation
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December is the coldest month for Seattle and overall the 19th and 27th are its chilliest days. They have daily highs averaging 46 degrees Fahrenheit (8 degrees Celsius) and lows of 37 °F (3 °C). Nearly every December day warms to over 40 °F (4 °C) in Seattle. Temperatures above 60 °F (16 °C) are uncommon here this month. Typically one entire day d...
Half the time, the Seattle receives 3.9 to 7.2 inches (100 to 183 mm) of precipitation for December. One in four years has drier weather, while another one in four is wetter.
Most Decembers remain free of snow. Only in one out of four years does the city receive 1.1 inches (3 cm) or more of snow for the month.
The sun's rays reach the ground in Seattle during 23 percent of daylight hours on average in December, for a total of 60 hours in the month. Typically on 3 days this month the sky is mainly clear, with at most 30 percent cloud cover. Sunlight in December at Seattle averages 8 hours and 29 minutes a day. The shortest days of the year, from around De...
The relative humidity in Seattle during December usually peaks at 83 percent in the morning then drops to 76 percent by early afternoon.
December is among the stormiest of months for Seattle. A December storm in Seattle usually means heavy rain and only rarely snow. The city has a December thunderstorm on an average of once every few years.
In December, Seattle typically experiences low temperatures and high rainfall. December falls within the winter season. Throughout the day, temperatures typically settle at around 8°C . But by evening, they drop to around 2°C . Typically, it's the chilliest month of the year.
In Seattle, Washington, the lowest average temperatures are observed in December, with a high of 43.7°F (6.5°C) and a low of 35.1°F (1.7°C). Humidity In December, the average relative humidity in Seattle is 84%.
- With its average high temperature of 43.7°F and a low of 35.1°F , December is regarded as the coldest month in Seattle.
- During December, Seattle experiences an average high-temperature of 43.7°F and a low-temperature of 35.1°F .
- In December, the average relative humidity in Seattle, Washington, is 84% .
- December is the month with the most rainfall in Seattle, Washington. Rain falls for 8.9 days and accumulates 0.87" of precipitation .
- In December, the rain falls for 8.9 days . Throughout December, 0.87" of precipitation is accumulated.
- In Seattle, snow does not fall in April through October and December .
- In December, in Seattle, it doesn't snow . November is the latest month when it typically snows.
- In Seattle, Washington, the average seawater temperature in December is 46.6°F . At temperatures below 50°F, swimming in a suitably protected sw...
- December has the shortest days of the year in Seattle, with an average of 8h and 30min of daylight .
Dec 9, 2021 · The average temperature in Seattle in December for a typical day ranges from a high of 43°F (6°C) to a low of 34°F (1°C). Some would describe it as cold with a gentle breeze. For comparison, the hottest month in Seattle, August, has days with highs of 77°F (25°C) and lows of 56°F (13°C).
The weather in december in Seattle is wet (with 3in of precipitation over 5 days). This is better than the previous month since in november it receives an average of 3.4in of rainfall over 6 days. The climate is quite cold in this city this month. Do not forget to cover yourself!
Feb 14, 2024 · Winter in Seattle, spanning December to February, is the coldest period with average high temperatures within 43.7°F (6.5°C) and 46.2°F (7.9°C), and average lows hovering between 35.1°F (1.7°C) and 36°F (2.2°C). The relative humidity remains fairly high during these months at 84% to 85%.
