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Overnight temperatures to warm slightly, stay below freezing Thursday

Overnight lows will likely remain below freezing this week. Seattle has already set two record low temperatures.

After hitting lows in the 20s and low 30s Wednesday morning, overnight temperatures are expected to warm slightly through the rest of the week.

Wednesday morning's low temperatures were expected to be the coldest of the week. Thursday morning temps will still be chilly, but are expected to be a few degrees warmer.

The South Sound and Southwest Interior, including Olympia and Chehalis, saw some of the coldest temps, according to the National Weather Service. It was in the mid-20s in Olympia around 5 a.m.

Seattle set a record low Monday at 34 degrees, which broke the old record of 35 degrees that was set in 2001. Seattle also broke a 14-year-old record low on Sunday at 36 degrees.

We did not break Tuesday's record low temperature of 31 degrees, which was set in 1971. Wednesday and Thursday's record low is 30 degrees, which were set in 1991 and 2006, respectively.

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Temperatures have been cold lately as a ridge of high pressure strengthens in the Pacific Northwest. This time of year, that high pressure causes wind to move from eastern Washington (areas where a continental climate tends to be colder in the winter) and blow through the Cascade gaps and arrive in western Washington. 

The lack of cloud cover will allow for those temperatures to stay cold all night long which could hinder outdoor plants and other sensitive material. 

The average low temperature for this time of year is 44 degrees.

With the temperatures dropping, it's that time of year where we start bringing up the four 's – Pets, Pipes, Plants, and People. Bring your pets and plants inside, make sure you're taking action to prevent pipes from freezing, and check in on people who may need extra assistance.

Road conditions could be slick with frost during the morning commute, and officials urged drivers to use caution.