Weather in Jasper in August

A good month. August is a solid month to be in Jasper. You should expect rain on 16 days of the month, which is more days wet than dry.

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

This is persistent light rain rather than storms: 16 wet days but only 1 heavy ones. It rarely cancels anything outright, and it rarely fully clears either. A jacket beats an umbrella. 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: it never really gets hot: not one day in an average August reaches 30 °C. Across the twenty years measured, the hottest August day reached 30.8 °C and the coldest night fell to 1.2 °C.

August is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest August on record still delivered 132 mm against 30 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 69 mm average is a reasonable planning figure, not a promise.

Wind is light at 0.8 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 74%.

How August sits in the year

Temperatures hold steady either side: 21.5 °C in July, 20.8 here, 15.8 in September. Nothing about the timing within the month matters much.

Daylight in August

14.8 hours of daylight, losing 1.9 hours across the month. That is between Jasper's extremes of 16.9 and 7.6 hours, so days are long enough not to constrain the plan.

An inland climate

With no coast nearby, the year swings a fair way — 33.4 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage. At 1062 m the air is thin enough to matter — sun that burns faster than the temperature suggests, and nights that cool off quickly.

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 Jasper versus nearby

If Jasper is one option among several, the nearby comparison is worth making. Banff is close enough to be a coin toss — within a degree on temperature, 3 days less rain. Edmonton is close enough to be a coin toss — 2 °C warmer, 5 days less rain.

So: August is the answer for Jasper. If it is booked out or priced out, July is the next best thing at 6 points behind, and March is the month to keep off the shortlist.

Every month in Jasper

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