With the Winter Olympics underway, snow and cold weather are on the mind!
However, here in the Pacific Northwest, the coldest part of winter is now behind us. Average high temperatures are beginning to warm, we’re gaining daylight every day - right now roughly three minutes per day - and our chances for lowland snow get smaller and smaller.
During the past 30 years, the average latest date we’ve measured snow at Sea-Tac is February 19th. However, we have certainly seen snow fall on later dates.
The latest Sea-Tac has recorded snow was April 17th. That happened back in 1972 when 1.2” of snow fell. Snow can fall in April, but it’s rare.
Once we get into the latter part of February and beyond, it gets exceedingly difficult to get snow down to sea level. The sun is just too high in the sky, the atmosphere just can’t get cold enough to produce snow. Based on our current forecast, we may be waiting until next year to find any white stuff in the lowlands.
As far as frost is concerned, the latest Seattle has seen temperatures at or below freezing occurred on May 1st. On average, our last frost occurs around March 24th.