Brr. It was 18 degrees in northern Minnesota this morning

The Twin Cities still hasn't seen its first frost.

It's been another cold morning in Minnesota.

The coldest place in Minnesota Monday morning was Embarass, where temperatures dipped down to 18 degrees. Much of northern Minnesota saw temperatures in the low 20s Monday, according to the National Weather Service in Duluth.

It was 21 degrees in International Falls and 23 degrees in Hibbing, while the low temperature in Duluth was 29 degrees.

It was chilly in the Twin Cities as well (a low in the mid-30s), but the metro is still waiting its first true frost, National Weather Service data shows. This is pretty rare – since 1871, 75 percent of the time the first frost has occurred by Oct. 19, the Minnesota Department of Natural Resources says.

Temperatures Monday are expected to climb to near seasonal levels, ranging in the mid-40s in far northern Minnesota to the mid-50s in the southern part of the state, the weather service says. (The average high for this time of year in Minneapolis is around 56 degrees, according to Mark Seeley's WeatherTalk blog, while the low is 38 degrees.)

Rain is coming

Enjoy the sunny day while it lasts, though. A storm is in the forecast, which will bring "widespread ran showers" to the area Tuesday and Wednesday, the National Weather Service says. The rain could turn into snow in northeastern Minnesota Tuesday night, while isolated thunderstorms are possible in southern Minnesota.

Meteorologist Paul Douglas says southern Minnesota could see 1-2 inches of rain by the middle of the week, according to the Star Tribune weather blog.

There's another chance for rain this weekend, and then temperatures are expected to get colder. Douglas writes the Twin Cities could be close to seeing its first official frost Sunday morning.

But overall, the longterm forecast shows the Twin Cities will see warmer than average temperatures through the end of the month and into November, Seeley says.

The NWS also had this depressing update on Sunday evening.

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