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Ontario: Below seasonal temperatures before pleasant weekend warmup

Tuesday, May 19th 2020, 5:00 am - Parts of southwestern Ontario will see some rain on Tuesday morning before calm, below seasonal weather moves in.

A stretch of calm, below seasonal weather will move into southern Ontario after a rainy long weekend. Temperatures will remain in the low teens and the cool air will linger through most of the week before a pleasant warmup by the weekend. Details and timing, below.


WEATHER HIGHLIGHTS:

  • Potential for 20-30 mm of rain in southwest on Tuesday morning
  • Temperatures remain cool until late week, warming up for the weekend
  • Keep on top of active weather ALERTS here.

TUESDAY: EASTERLY WIND KEEPS TEMPERATURES COOL

Aside from showers in southwestern regions of southern Ontario during the morning, dry weather will return on Tuesday with a mix of sun and clouds. However, an easterly wind off Lake Ontario will remain, keeping temperatures below seasonal, especially around the west end of the lake.

ONICONS

WEDNESDAY AND BEYOND: WARMER TEMPERATURES IN SIGHT

Wednesday will feature similar conditions and near seasonal temperatures across much of southern Ontario, but the easterly wind off Lake Ontario will continue to keep temperatures quite cool across the GTA.

The persistent easterly wind is the regult of a large area of low pressure near the East Coast of the U.S. and high pressure over Quebec, which will stall through the end of this week. Showers could return Friday.

"Several days ago it looked like the end of next week would bring a taste of summer weather to Ontario and Quebec. The warm weather is still on the way, but a persistent easterly flow off Lake Ontario will keep temperatures cooler than originally expected across the Golden Horseshoe through Friday," says Weather Network meteorologist Dr. Doug Gillham.

ontemps

At this point, indictations are that the east wind will relax for the weekend, allowing for temperatures to climb into the 20s across the region.

Check back as we continue to monitor the forecast.

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