Air from the Yukon brought the temperature in southeast Saskatchewan down considerably.
A high of -3.7 C, recorded around noon Sunday, fell to a low of -25.2 C around 6 a.m. Monday.
Meteorologist Robyn Dyck said a cold front followed a low-pressure system that tracked just south of Estevan, along the US border.
"What followed is an arctic ridge of high pressure that basically came from the Yukon. It brought a whole bunch of cold temperatures with it."
Environment Canada warns of the risk of frostbite in their forecast, with wind chill values around -36 C Monday morning, -23 C Monday afternoon, and back down to the -35 C realm Monday night.
But temperatures will soon rise to more-typical levels.
"The next few days we should have a bit of a reprieve as we get to a bit of a westerly push," said Dyck. "Even though we got cold overnight, today we're back to minus 14. Which, I guess is still colder than normal. Our normals for Estevan are high minus 6. But by mid-week we're back to normal temperatures."
Snow is forecast for Wednesday, though Dyck said the majority of that will be further north in the province.
"We have a system that's going to track across the northern prairies. So again, because it's going to the north of Estevan, most of the snow will be in central and northern areas. So not much accumulation expected for Estevan then either."
Dyck said a monitoring station near Estevan reported five centimetres of snow on the weekend. A station near Assiniboia, where a snowfall warning was in effect, recorded 10 centimetres.
She said accumulation can be tough to gauge, as snow tends to drift.