For this forecast period, it looks like the upper ridge will slowly flatten and drop southwards as a series of weak lows track across the northern Prairies. This will result in a reduction in the extreme temperatures. Daytime highs and overnight lows should fall back to more seasonable values.
weather — page 9

Prairie forecast: More typical summer weather
Forecast issued July 10, covering July 10 to 17, 2024

Prairie forecast: A switch in the weather pattern?
Forecast issued July 3, covering July 3 to 10, 2024
Over the last couple weeks, I've been asked repeatedly, “when will summer actually get here?” This is especially true over the eastern Prairies. It just doesn't and hasn’t felt like summer yet. Well, it looks like the cool, unsettled weather pattern will be breaking down during this forecast period. This will allow much more summer-like temperature to move in.

Prairie forecast: Drier pattern overall with unsettled patches
Forecast issued June 19, covering June 19 to 26, 2024
While it looks like we'll see a slightly more stable pattern develop during this forecast period, there will still be some unsettled weather to deal with.

Prairie forecast: Drier with a slow warming trend
Now—for those of you who still need rain, the developing pattern doesn't look like an overall dry pattern. It's just not all clouds with the threat of showers every couple of days. For those of you on the eastern Prairies who are tired of rain then a little sunshine and heat is what the doctor ordered.

Prairie forecast: Mild and dry weather right up to the holidays
Issued Dec. 13, covering Dec. 13 to Dec. 25
Here is the big picture: there are two current storm tracks across North America. The first, which is well to our north, is the storm track that would normally be across our region. So far this winter, it has been displaced to our north – one of the reasons we have been dry. The second storm track is well to the south across the southern U.S. This places us under a rather slack flow as we oscillate between pushes of warm and cool air with each passage of low-pressure to our north.