Late-Summer Warmth Persists

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Temperatures will head back towards the upper 20s as the new school year gets started.

An upper ridge building across the Prairies will bring plenty of sun to Winnipeg through the rest of the week. Skies will stay fairly sunny right through Friday with just a few cloudy periods. As that upper ridge builds eastwards, temperatures will also climb with highs increasing from the low 20s today to near the 30 °C mark by Friday. With little humidity around, overnight lows will range from the high single digits to the low teens.

RDPS 2m Temperature Forecast valid 21Z Friday September 10, 2021
Warm summer temperatures will return to southern Manitoba by Friday.

That northwest wind will return today, although not as strong as the city saw yesterday. The wind will pick up through the morning hours to 30 gusting 50 km/h for the rest of the day. Once the sun goes down this evening, the winds will quickly ease. A surface ridge moving across the province will keep winds light out of the south on Thursday. Then on Friday, the southerlies will strengthen back to around 30 km/h as a low pressure system moves into the province.

The region will stay dry through much of the week, although there is a slight chance of showers or thunderstorms on Friday night.

Long Range Outlook

A cold front will pass through the region on Friday night, ushering in a cooler air mass for the weekend. Highs will fall into the upper teens with a brisk northwest wind on Saturday that eases for Sunday. Skies will be mixed to mostly cloudy through the weekend.

Today’s seasonal daytime high in Winnipeg is 20 °C while the seasonal overnight low is 8 °C.

Temperatures Soaring For the Weekend

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After a week bringing welcome reprieve from the heat, more rain than Winnipeg has seen in months, and some clean air back to the region, sun and summer heat will return this weekend.

Winnipeg will see one more seasonably cool day today as an upper trough exits the region. Temperatures will climb into the low 20s with light northwest winds. A few morning clouds will clear out for the afternoon leaving sunshine and a pleasant summer day. Tonight will bring seasonal temperatures down to the low teens and clear skies.

An upper ridge will build across the province this weekend, bringing light winds on Saturday strengthening to moderate southwesterlies on Sunday. Temperatures will climb into the low to mid-30s both days with plenty of sunshine. Humidity levels should stay comfortable through the weekend.

RDPS 2m Temperature Forecast valid 21Z Saturday August 14, 2021
Very warm temperatures will spread back across the southern Prairies this weekend.

This system will also bring very warm nights to the region with lows climbing to the upper teens on Saturday night and low 20s on Sunday night.

Fortunately, the region should stay smoke-free for the weekend. Smoke models show no notable smoke levels right through into Sunday. That said, there’s a chance some hazy conditions could return to the region late Sunday into Monday, sourced from the wildfires over southern British Columbia.

All in all, it will be a hot and beautiful summer weekend across southern Manitoba.

Long Range Outlook

Conditions are forecast to turn more unsettled next week beginning on Tuesday and persisting much of the week. Temperatures will gradually ease back towards seasonal values with several chances of showers or thunderstorms over a multi-day period.

Today’s seasonal daytime high in Winnipeg is 25 °C while the seasonal overnight low is 12 °C.

Unsettled Conditions Break The Heat

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A cold front pushing through southern Manitoba will bring a chance of showers to Winnipeg along with some relief from the heat.

Temperatures will climb to a high near 30 °C today as the summer heat continues across southern Manitoba. Smoke will also be sticking around for much of the day as well with a southerly wind near 30 km/h. By late in the day, a low pressure system will cross the province and drag a cold front south. This will bring some scattered showers to the region with the chance of a thunderstorm or two.

Winds will switch to the northwest behind the low, likely ushering one more shot of thicker smoke. Air quality be substantially degraded this evening. Cloudy periods will persist through the night with a chance of showers late in the night into Thursday morning. The smoke will begin to clear out overnight as temperature dip to a low near 18 °C.

RDPS 2m Temperature Forecast valid 12Z Thursday August 5, 2021
Showers are possible across much of central and southern Manitoba on Wednesday into Thursday morning.

There will be a small chance of a shower early Thursday morning as the cold front swings through, then skies will begin to clear out.Northerly winds pick up into the 20–30 km/h range with a high near 25 °C in Winnipeg. The city should see better air quality through the day and some sunshine through the afternoon hours. Temperatures will head to a low near 15 °C on Thursday night with easing winds.

For Friday, a ridge of high pressure to the north will bring partly cloudy skies to the region. Temperatures will climb to a high near 28 °C with light easterly winds.

The forest fire smoke should stay primarily to the east of Winnipeg on Thursday and Friday, but there will be a small chance that some of it drifts into the region from time to time.

Long Range Outlook

Warm weather will return to the region this weekend with highs climbing back towards the 30 °C mark. Another low pressure system working its way across the region will bring more humid conditions to the region with a chance of showers or thunderstorms Saturday night into Sunday.

The potential for more unsettled weather is possible to start next week, followed by a return to seasonal temperatures.

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