It will be a cool start to the week in Winnipeg, but summer heat will quickly build back into the region this week.

Southern Manitoba will continue to see cooler weather today thanks to a broad vortex over Hudson Bay. It has brought a northerly flow the province and sent a pipeline of Arctic air southwards over the eastern Prairies. The seasonably cool temperatures will stick around today, supported by a northwest wind near 30 km/h. Winnipeg will likely start the day with some sunshine, but skies will become mixed through the morning. There will be a small chance of some midday showers today as the winds shift the Lake Manitoba streamers towards the city. Temperatures will reach a high near 17 °C. A few clouds will linger tonight as winds ease and temperatures drop to a low near 6 °C.

Seasonal temperatures will return to southern Manitoba on Tuesday an upper ridge pushes eastwards across the Prairies. A weak ridge will bring sunny skies to the Red River Valley with a high near 25 °C in Winnipeg. Winds will be light out of the southwest at 15–25 km/h. A warm front will push across southern Manitoba on Tuesday night, bringing a few clouds to Winnipeg with a mild low near 16 °C. Winds will strengthen out of the south overnight as well, increasing into the 30–40 km/h range by Wednesday morning.

The heat will be back on Wednesday with temperatures climbing to a high near 31 °C. Those moderate southerly winds will ease midday as a trough of low pressure moves into the Red River Valley. Winds look to switch to westerly at 20–30 km/h for the afternoon with a few clouds. A cold front pushing into the region later in the day will bring a chance of showers or thunderstorms to Winnipeg. Any storms would have limited energy to work with, but the winds will be favourable to help organize any thunderstorms that develop. The forecasted environment would suggest that some scattered thunderstorms are possible with a risk of isolated marginally severe storms.

Everything will settle down on Wednesday night with a low near 15 °C under mixed skies.

Long Range Outlook

Winnipeg should see near-seasonal temperatures through the rest of the work week, followed by a return of hotter conditions for the weekend into next week. Forecasts show little precipitation ahead with mainly sunny conditions this weekend into next week.

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

Winnipeg’s temperatures will continue above seasonal values as a Colorado Low pushes warmer air northwards. This storm system will bring blizzard conditions with 30 to 50 cm of snow across parts of southern Saskatchewan into central Manitoba as well as a swath of rain and freezing rain. Winnipeg will avoid the worst of it with comparatively pleasant conditions.

Today will mark the transition from the mild, dry Pacific flow of the past few days towards a developing Colorado Low. Winnipeg will see northerly winds in the 20–30 km/h range today. Those winds will keep things cooler with a high near 5 °C under mixed skies. The winds will ease a bit tonight as they shift to the east under cloudy skies. Temperatures should dip to a low near 0 °C.

On Saturday, the storm system will be gathering strength south of the border and supporting a blanket of cloud cover across southern Manitoba. Temperatures should reach a high near 7 °C with easterly winds at 15–25 km/h. The cloud cover and a push of warmer air from the Colorado Low will keep temperatures mild on Saturday night with a low near +3 °C.

Sunday will start with a warm front pushing northwards through the Red River Valley. It will bring some drizzle or light rain as it moves through, with mild temperatures afterwards. Winnipeg should see a high near 12 °C but could end up ±2–3 °C depending on the exact low track. A cold front will sweep through on Sunday evening, bringing another chance of showers. Winds will sift to the west overnight as temperatures head to a low near -1 °C.

Long Range Outlook

Much cooler air will push into the region behind this system, triggering more lake-effect precipitation off the Manitoba Lakes on Monday. Winnipeg may end up seeing some flurries through the day as the winds gradually taper off. Things should settle down for Tuesday and the rest of the week, but highs will likely hover just below freezing.

The long-range forecast looks fairly dry with near-seasonal temperatures.

Today’s seasonal daytime high in Winnipeg is 2 °C while the seasonal overnight low is -7 °C.

Winnipeg will see more cloud with a chance of flurries over the next few days as northwest winds stream lake-effect cloud into the Red River Valley.

Cool weather continues in Winnipeg and will persist right through the weekend. Daytime highs over the coming days of 0 to -2 °C will be some 7 to 10 °C below seasonal values. These cool temperatures will combine with west-northwest winds to generate a fair amount of lake-effect cloud. Overnight lows will also dip well below seasonal values, generally into the -5 to -10 °C range.

Today, the west-northwest wind will pick up into the 20–30 km/h range this morning. This wind will support lake-effect cloud and snow that will move off Lake Manitoba and towards Winnipeg. The wind will ease off tonight and turn more westwards, which will weaken the lake effect snow and bring some clear patches into the city.

On Saturday, winds will turn back northwesterly, but be lighter than Friday. As a result, Winnipeg will likely see a mix of sun and cloud, but flurries are unlikely for the day. Skies will stay mixed to mostly cloudy on Saturday night.

On Sunday, Winnipeg will see mostly cloudy skies with another chance of flurries off Lake Manitoba as west-northwest winds once again pick up into the 15–25 km/h range. Winds will shift west-southwest on Sunday night and clear things out.

Long Range Outlook

Monday should bring sunshine to the region, but then cloudier conditions will return as a much more unsettled pattern develops over the region. While temperatures will continue with highs near the freezing mark, there will likely be several chances of widespread snow events through the week.

Today’s seasonal daytime high in Winnipeg is 7 °C while the seasonal overnight low is -2 °C.