The switch to Fall continues Labour Day Monday, with below average temperatures arriving after a very windy day throughout much of Southern Manitoba.

"Strong northwesterly winds in the wake of a passing cold front Sunday brought blustery conditions to many areas, and also the arrival of a chilly air-mass sliding down from Canada's north," explained CMOS Accredited Weathercaster Chris Sumner Monday morning.

The following wind gusts were reported across southern Manitoba on Sunday, with the information from the Environment Canada Manitoba Agricultural networks. All values are in kilometres per hour.

Victoria Beach 102
Oakpoint 89
Winnipeg International Airport/Elie/Stonewall 87
Narcisse 85
Altona 84
Lac du Bonnet 83
Elm Creek 82
Brandon/Green Lake/St. Pierre/Teulon 80

"And with the strong winds behind us, that cold air-mass will keep temperatures well below average for the next couple days, and also mean a widespread risk of frost Monday night and Tuesday night," said Sumner.

Tonight, a ridge of high pressure, building southward from the Northwest Territories, will settle into the Prairies. As a result, with light winds and clearing skies, temperatures over some areas will likely fall below the zero mark by Tuesday morning. Frost advisories are expected to be issued later today.

"The southwestern corner of the province is the most likely area to see frost tonight," noted Sumner. "That's not to say areas further east like the Red River Valley and Southeast won't see a touch of frost, but temperatures are expected to remain slightly above zero in those regions. Tuesday night it's quite likely all regions of Southern Manitoba will see some frost."

Sumner doesn't believe this will be a "killing frost", but noted that will depend entirely on how low temperatures get, and for how long. Overnight lows tonight are expected to be between +2 and -1, while Tuesday night they are expected to be around -1 to -2. Average overnight lows for this time of year are 7 to 8.

"The unseasonably cold temperatures aren't expected to last long, with warmer temperatures and a southerly flow returning later this week," added Sumner.

Daytime highs are expected to recover to the upper teens by Wednesday, and hit the low 20's Thursday through Sunday.