Friday, June 7th 2019, 8:45 am - What Canada can expect for the month of June
The first week of June has featured a familiar pattern from Ontario to Atlantic Canada with cooler than seasonal temperatures dominating the region.
The map below shows the temperature anomalies so far during June (blues and greens represent colder than normal temperatures while orange and red represent warmer than normal temperatures). This does highlight the one exception across eastern Canada, with much of Newfoundland seeing warmer weather so far during the first week of June.
Across the northern Prairies, northern B.C. and adjacent territories, June has brought a much cooler pattern, while across parts of southwestern Canada it's been much warmer than normal.
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BRIEF PATTERN REVERSAL OVER THE WEEKEND
This weekend will feature a temporary pattern change which will bring widespread colder than normal temperatures across western Canada. Meanwhile, much warmer weather will make an appearance from Ontario to the Maritimes. This region will have a spectacular summer-like weekend with sunshine for much of the region.
The hottest weather in the country this weekend will be found in an unlikely region – near the shores of James Bay. The temperature highs on Sunday reach near 30°C from Kapuskasing and Timmins and western Quebec, hit the lower 30s around Moosonee.
Meanwhile, temperatures across southern Ontario will be around the low to mid-20s, with temperatures locally cooler near the shores of the Great Lakes.
FAMILIAR PATTERN RETURNS FOR MID-JUNE
The pattern change mentioned above will be rather temporary. Mid-June will bring a return to a familiar pattern with warmer than normal temperatures expected for B.C. and Alberta, and cooler than normal temperatures from Manitoba to Atlantic Canada.
The map below shows the dominant pattern that we expect for June 10th through June 20th.
At this point, we do not see any signs of an extended period with warmer than normal temperatures from Manitoba to Atlantic Canada through the end of June. However, the rest of June will still feature periods of pleasant late spring weather across this region - just not the hot summer weather that we often see this time of year. The consistent heat is expected to be confined to western Canada through the end of the month.