Sweltering Summer Heat Returns To Winnipeg

A hot and increasingly humid air mass will bring sweltering summer heat back to Winnipeg.

Get the sunscreen out and make sure that A/C is working: sweltering summer conditions are on their way to Winnipeg! An upper ridge will develop a deep southerly flow through the American Plains and southeastern Prairies, pushing heat and humidity northwards into the region.

Today, Winnipeg will see a high near 27°C with brisk southerly winds of 30 gusting 50 km/h develop. A passing upper disturbance will bring a few clouds to the region this morning, followed by mainly sunny skies for the afternoon. Humidity levels will stay comfortable today. The winds will persist out of the south at around 20 km/h tonight with clear skies and a low near 16°C.

On Thursday, the southerly winds will pick up to 40 gusting 60 km/h as muggier conditions develop over the region. The city will see a high near 29°C with dew points climbing into the upper teens. The muggier conditions will be slightly offset by the wind, but it’ll still feel fairly muggy. Winds will keep up out of the south at around 30 km/h on Thursday night with a low near 20°C.

GDPS 2m Dew Point Temperature Forecast valid 18Z Friday July 24, 2020
Very muggy conditions will develop over southern Manitoba on Friday.

A trough of low pressure pushing eastwards on Thursday night will bring a risk of thunderstorms to southern Manitoba. For Winnipeg and the Red River Valley, the main threat looks to exist between 4 A.M. and 7 A.M. early Friday morning. These thunderstorms, if they develop, could be severe with a primary threat of damaging wind gusts and large hail. Rainfall with these thunderstorms may be intense, but the storms will be moving quickly which will limit accumulations.

Friday morning will see cloudy conditions in the wake of any potential convection, then skies should mix out midday. It will be an oppressively hot afternoon in Winnipeg with a high near 34°C and dew point in the low 20s. Humidex values in the the low 40s will seem even more oppressive as winds ease in the afternoon.

Winnipeg will see partly cloudy skies on Friday night with a low near 22°C.

Long Range Outlook

Saturday will bring more hot and humid weather to Winnipeg alongside unsettled conditions as a cold front sweeps through later in the day. Brisk northwest winds will bring seasonal conditions and plenty of sunshine back to the region for Sunday. Next week looks to bring seasonably mild conditions with plenty of sunshine and comfortable humidity levels.

Today’s seasonal daytime high in Winnipeg is 26°C while the seasonal overnight low is 13°C.


Brad lives in Winnipeg with his wife and two children and is the founder of A Weather Moment. He has loved weather from a very young age and has followed that passion through his life so far. He received a B.Sc. in Earth Sciences with Specialization in Atmospheric Sciences and is currently employed in the field of meteorology. You can find the author as @WeatherInThePeg on Twitter.