Edmonton weather: Heat streak begins tomorrow

An aerial image of Rogers Place in downtown Edmonton on June 17, 2025. (Cam Wiebe / CTV News Edmonton)

The “cool” spell is coming to an end after today.

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Six of the last nine days have been cooler than average in Edmonton.

The average high for the back half of July is 24 C.

Today will run that streak to seven of 10 days below normal.

We’ve only been above 24 C once since July 18 (29 C last Thursday) and we’ll be below that threshold again today, with a high of 21 or 22 C.

But, daytime highs will climb into the 25/26 C range Tuesday and then up around 30 C for Wednesday-Friday as a big upper ridge takes over.

That’ll help kick in some heat AND keep skies clear through to the weekend.

Again...that’s AFTER today. We’ll have a mix of sun and cloud over the Edmonton region today with temperatures in the upper teens by midday and low 20s this afternoon.

Showers and thunderstorms are expected in the foothills and across southern Alberta once again.

Severe storms are possible, especially in the south, with large hail.

Most (probably all) of that activity will steer clear of the Edmonton region.

There’s a slight chance of a scattered showers and possibly a few flashes of lightning, but most of the area should stay dry today.

The upper ridge brings sunshine and heat for Tuesday-Friday. But, it looks like it’ll break down by the weekend.

There’s some uncertainty with the timing and location of showers/rain for the weekend.

The GDPS model has Saturday looking wet and then drier conditions for Sunday.

But, the GFS modelling keeps showers over most of central and north-central Alberta through both days.

So...we’ll watch and see how that develops over the course of the week.

It definitely looks like the heat streak will end by the weekend, though. Daytime highs will very likely be back in the low 20s for Saturday/Sunday.

Here’s the forecast for Edmonton and area:

Today - Mix of sun & cloud. Slight chance of a scattered shower or thunderstorm late this afternoon.

High: 22

Tonight - Slight chance of a shower or thunderstorm early this evening. Clearing overnight.

9pm: 18

Tuesday - Mainly sunny.

Morning Low: 13

Afternoon High: 25

Wednesday - Mainly sunny.

Morning Low: 14

Afternoon High: 28

Thursday - Mainly sunny.

Morning Low: 16

Afternoon High: 29

Friday - Mainly sunny.

Morning Low: 17

Afternoon High: 29

Saturday - Mostly cloudy. 40% chance of showers.

Morning Low: 16

Afternoon High: 23