Winnipeg will see summer warmth continue through the first half of the week followed by a return to more seasonal temperatures.

Winnipeg will see mainly sunny skies today courtesy a ridge that extends south through Manitoba from a high near the 60th parallel. With light winds, temperatures will climb to a high near 29 °C this afternoon. Along with the warmth, humidity levels will stay comfortable and make for a beautiful afternoon. Temperatures will dip to a low near 15 °C tonight with clear skies.

On Tuesday, temperatures will again climb to a high near 29 °C but a warm front will spread cloud into the region through the day. There will be a chance of scattered showers as the warm front passes midday, and again as a cold front sweeps southeast on Tuesday night. After the warm front pushes through, winds will increase out of the southeast to 30–40 km/h for the afternoon. The winds will ease after midnight, then pick up out of the northwest with the cold front early Wednesday morning.

With both the warm and cold fronts, there will be a chance of a thunderstorms. The environment will not likely support a widespread severe weather threat, but isolated severe thunderstorms may be possible. If any severe thunderstorms develop, the primary threat associated with them would be large hail and damaging wind gusts. For any thunderstorms at night, the primary threat will be hail.

On Wednesday, northwest winds will persist at 20–30 km/h through the day and usher in more seasonal temperatures. Skies will be on the cloudier side through the morning, but should clear out for the afternoon. Winnipeg will see a high near 25 °C in the afternoon and a low near 13 °C on Wednesday night.

Long Range Outlook

A cooler air mass will move into the region for the second half of the week. Winnipeg will see highs cool to the low 20s and lows to the mid- to low teens. Skies will be variably cloudy through the second half of the week with another chance for showers or thunderstorms later Thursday.

Today’s seasonal daytime high in Winnipeg is 23°C while the seasonal overnight low is 10°C.

Winnipeg will see warm summer temperatures return with a good chance of thunderstorms on Thursday evening.

Before any unsettled weather arrives in Winnipeg, the city will get to enjoy a beautiful summer day. Under sunny skies, temperatures will climb to around 27°C with light winds. Thunderstorms moving into southwestern Manitoba overnight will spread some cloud into the Red River Valley as temperatures head to a low near 11°C.

The city will see mixed skies on Thursday as a low pressure system moves into the Red River Valley. There’s a slight chance of an early morning shower or thunderstorm as nocturnal convection weakens heading into the Red River Valley. Through the rest of the day, skies will likely err on the cloudier side. A southerly wind will develop to around 25 km/h as temperatures climb to a high near 28°C.

Notably, the humidity will build on Thursday with dew points climbing into the upper teens. This moisture will help support a severe weather threat on Thursday evening as a low moves through. Moderate amounts of instability supported by favourable wind shear will support the development of scattered thunderstorms over western Manitoba in the afternoon. This activity will shift into the Red River Valley through the evening, quickly exiting with a slight chance of a few lingering showers overnight. Strong to severe thunderstorms are possible with primary threats of damaging hail and wind gusts.

Temperatures will dip to a low near 17°C on Thursday night with diminishing winds.

A few lingering showers are possible Friday morning, then Winnipeg will see mixed skies with some clearing later in the day. Temperatures will stay warm with a high near 27°C, but humidity levels will return to more comfortable levels. Winds will pick up out of the northwest into the 20 to 30 km/h range for the day, then ease in the evening. The city will see a low near 14°C on Friday night under clear skies.

Long Range Outlook

Through the weekend, a digging west-coast upper trough will build an upper ridge over Manitoba. As a result, hot weather will develop this weekend with highs climbing back over 30°C alongside gradually increasing humidity. Skies should stay on the sunnier side through the weekend.

Heading into next week, it’s looking as though temperatures will stay hot and humid! Unsettled conditions and several chances for showers or thunderstorms.

Today’s seasonal daytime high in Winnipeg is 24°C while the seasonal overnight low is 12°C.