Colleen Bready’s forecast: Hot start to summer

Colleen Bready has your current conditions and updated weather forecast for June 20, 2025.

Summer officially begins in Manitoba Friday night with the arrival of the solstice at 9:42 p.m.

Until then, Friday afternoon will be hot and humid across southern Manitoba, particularly in the southeast.

Daytime highs in Winnipeg and surrounding areas will reach the upper 20s, with humidex values that will feel in the low to mid-30s.

Temperatures and humidex values in Brandon and nearby southwestern regions won’t be quite as high Friday, but not far off.

Environment and Climate Change Canada (ECCC) said a moisture-laden, unstable air mass will push into southeastern Manitoba from the Dakotas on Friday.

The air mass is part of a mix of conditions spreading north from the US that could produce thunderstorms in southern Manitoba later Friday afternoon and at night.

The chance of afternoon storms is lower in the afternoon but increases in the evening hours.

ECCC said the higher threat of severe storms will be in the Dakotas, but they can’t be ruled out in the southeast and extreme southern Manitoba.

According to the weather agency, the more likely scenario sees general showers and isolated thunderstorms Friday night into Saturday morning across southern Manitoba.

Conditions on Friday are more stable in northern Manitoba. Most areas will be sunny with highs in the low 20s in the afternoon.

The next meaningful chance of precipitation in wildfire-affected Flin Flon is on Sunday night, with rain expected. The rain is expected to continue until Tuesday as showers or rain.

Air quality in the south could deteriorate this weekend. ECCC said smoke plumes from wildfires near Island Lake and Nopiming Provincial Park will spread into southern Manitoba from Friday night into Saturday morning.

Poorer air quality is possible east of Lake Winnipeg and the Interlake, according to ECCC.