snow in seattle in december

Does Seattle Really See Snow in December?

Yes, Seattle does experience snowfall in December, although it’s not always a guarantee. While Seattle winters are generally mild compared to other northern cities, December often sees a mix of rain and snow, with the possibility of accumulating snow, especially during colder years. Snowfall amounts can vary greatly from year to year, and even within the city itself.

Seattle December Snow: A Detailed Look

Seattle’s location and climate contribute to its unpredictable December snowfall. Situated near Puget Sound and the Cascade Mountains, the city experiences a maritime climate, which brings relatively mild temperatures and high levels of precipitation. However, cold air outbreaks from the Fraser River Valley in British Columbia can occasionally push south, bringing freezing temperatures and snow to the Puget Sound region.

Factors Influencing December Snowfall

Several factors play a role in determining whether Seattle will see a white December:

• Temperature: The most crucial factor is temperature. For snow to accumulate, the air temperature needs to be at or below freezing (32°F or 0°C).
• Precipitation Type: Even with freezing temperatures, precipitation can still fall as rain if the air is warm enough aloft. The depth of the cold air layer is critical.
• Elevation: Higher elevations in Seattle are more likely to receive snow than lower areas.
• Weather Patterns: Large-scale weather patterns, such as the position of the jet stream and the presence of low-pressure systems, can influence the likelihood of snow.

Snowfall Amounts in December

The amount of snow Seattle receives in December varies significantly. Some years see little to no snow, while others can experience several inches. According to Seattle’s climate data on Wikipedia, the average December snowfall is around 2.3 inches. However, this is just an average, and actual snowfall can deviate considerably.

Impact of Snow on Seattle

Even relatively small amounts of snow can have a significant impact on Seattle. The city is not well-equipped to handle heavy snowfall, and even a few inches can lead to traffic congestion, school closures, and airport delays. Seattle’s hilly terrain also makes driving in snowy conditions particularly challenging.

Frequently Asked Questions About Seattle Snow in December

Is it common for Seattle to have a white Christmas?

While not impossible, a white Christmas in Seattle is not very common. The odds are relatively low and vary from year to year.

What months does it usually snow in Seattle?

Snow is most likely to fall in Seattle between December and February. However, it can snow as early as November and as late as March.

Why does Seattle shut down with just a little snow?

Seattle’s infrastructure and driving habits are not designed for snowy conditions. The hills, combined with a lack of snowplows and salt trucks, make it difficult to navigate the city safely.

What is the coldest month in Seattle?

January is typically the coldest month in Seattle, with average temperatures in the low 40s Fahrenheit.

Does Seattle salt the roads when it snows?

Seattle primarily uses de-icer, like magnesium chloride, on roads to prevent ice formation. Salt is sometimes used, but de-icer is more common.

Summary

December in Seattle can be a mixed bag when it comes to snow. While not a guarantee, snowfall is certainly possible, and sometimes even probable. The city’s unique climate and geographical features contribute to the unpredictable nature of Seattle’s winter weather, making each December a unique experience. Keep an eye on the forecast and be prepared for anything from rain to snow!