Weather in Winnipeg in August

Prime time. August is about as good as Winnipeg gets. Highs average 25.5 °C, lows 13.7 °C, and rain falls on 12 days — nothing in the month is working against you.

August is the highest-scoring month of the twelve. The nearest rival is September, and the month at the other end of the year is November.

Rain on 12 days, 1 of them heavy. Enough to need a plan B, not enough to need a plan around it. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: 4 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest August day reached 38.1 °C and the coldest night fell to 4.1 °C, and the wettest single day dropped 35 mm — roughly 55% of the month's rain in one day.

August is moderately variable: 28 mm in the driest year against 133 mm in the wettest, around an average of 64 mm. Roughly two Augusts in three land near that average, and the third does something else entirely.

Wind is light at 10.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 66%.

How August sits in the year

Temperatures hold steady either side: 26.5 °C in July, 25.5 here, 19.8 in September. Nothing about the timing within the month matters much.

Daylight in August

14.5 hours of daylight, losing 1.6 hours across the month. That is between Winnipeg's extremes of 16.3 and 8.1 hours, so days are long enough not to constrain the plan.

An inland climate

Winnipeg has no sea to moderate it, and it shows: 48.9 °C separates the hottest afternoon of the year from the coldest night. That is a genuinely continental range, and it means summer and winter here are barely the same place.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

August in Winnipeg versus nearby

If Winnipeg is one option among several, the nearby comparison is worth making. Regina is close enough to be a coin toss — within a degree on temperature, 3 days less rain. Thunder Bay is close enough to be a coin toss — within a degree on temperature, the same number of rain days.

So: August is the answer for Winnipeg. If it is booked out or priced out, September is the next best thing at 0 points behind, and November is the month to keep off the shortlist.

Every month in Winnipeg

See all twelve months in Winnipeg, or where else to go in August.