Weather in Jasper in April

The month to avoid. Of the twelve, April is the one to avoid. Highs sit at 6.2 °C and the day is short; this is an indoors-with-excursions month, not an outdoors-all-day one.

April ranks 7 of 12 in Jasper: past the worst of the year but short of August, which is the month to book if the dates are open.

This is persistent light rain rather than storms: 15 wet days but only 0 heavy ones. It rarely cancels anything outright, and it rarely fully clears either. A jacket beats an umbrella. Layers, and a genuinely waterproof outer — at 6.2 °C the difference between a good day and a miserable one is entirely down to what you are wearing.

What the averages hide

Averages flatten a month, and this one hides a few things: 24 nights drop below freezing, so anything left outside stays frozen. Across the twenty years measured, the hottest April day reached 22 °C and the coldest night fell to -22 °C.

April is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest April on record still delivered 83 mm against 24 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 50 mm average is a reasonable planning figure, not a promise.

Wind is light at 1.5 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 83%, which at 6.2 °C means damp rather than muggy — the kind of cold that gets into a coat and stays there.

How April sits in the year

The month is on the way up: 4.6 °C warmer than March, and May adds another 7.6 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in April

13.9 hours of daylight, gaining 2 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

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

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

April in Jasper versus nearby

If Jasper is one option among several, the nearby comparison is worth making. Banff is the weaker option in April — 2.7 °C cooler, 2 days more rain. Edmonton is a better bet in April — 3.8 °C warmer, 7 days less rain.

So: April is a compromise. August is 46 points better and is what Jasper is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Jasper

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