May quietly rolls into southern Ontario, but conditions will change

Digital Writers
·3 min read
May quietly rolls into southern Ontario, but conditions will change
May quietly rolls into southern Ontario, but conditions will change

April certainly ended in a blustery fashion across southern Ontario, with howling winds sweeping through, downing trees in some areas. The start to May will be much quieter, though somewhat cool still. Saturday will be pleasant, but make sure to dress warmly if heading outdoors for some exercise. Sunday sees a warmup in parts of the south, though will come with some showers, thanks to a boundary that will be moving in place and sticking around into next week. This will allow for multiple systems to track in with bouts of precipitation through the week, with no signs of sustained warmth for the first half of May. A more detailed look, below.

SATURDAY: COOL SIDE OF SEASONAL, CHANCE OF EVENING SHOWERS

After frosty start Saturday morning to kick off May in southern Ontario, sunshine will make for a pleasant day across the region, though still on the cool side of seasonal.

SEE ALSO: After a strong start in April, spring sputters into May across Canada

Temperatures will range from the low double digits to the mid-teens in the south, with even single-digit daytime highs in cottage country.

ONTempSat
ONTempSat

While most of the day will be dry, an approaching boundary could bring a chance of scattered showers in the evening hours across the south.

SUNDAY: TEMPERATURES REBOUND, WITH MORE SHOWERS ON THE WAY

The southerly flow will hold over southwestern Ontario Sunday, pushing temperatures into the mid-20s, while under the boundary, the GTA and the central region will daytime highs in the mid-teens.

ONRAIN
ONRAIN

The showers accompanying the boundary Sunday morning won't be excessive by any stretch, but may be enough to deter any outdoor plans. Amounts of 5-10 mm are expected in a swath extending from cottage country to the GTA.

This won't be the end of the unsettled weather as a more significant and soggy system will track into the Great Lakes Sunday night.

LOOK AHEAD: MORE RAIN, LACK OF ANY CONSISTENT WARMTH INTO MOTHER'S DAY WEEKEND

Beyond the weekend, the boundary sticks around for the week to come, thanks to some ridging trying to develop along the U.S. East Coast, while a trough digs into northern Ontario. On Monday, a potent system will slowly track along the boundary draped southern Ontario, bringing widespread rain.

Another system is expected to track south of the Great Lakes on Wednesday, with the potential for more rain. Some models track this system too far to the south to impact the region. So sunshine will try to fight back on Wednesday, but likely won't last for long.

ONTempTues
ONTempTues

A rather chilly pattern is anticipated for the end of the week and on weekend with a threat for showers, and possibly some graupel. Forecasters will be keeping an eye on the potential for a hard freeze if there is clear and calm conditions during any of the nights.

The chilly pattern is expected to continue through at least May 10, and possibly through the second week of May. While March and early April brought an abundance of May-like temperatures, the first half of May will feel more like early April.

Be sure to check back for updates on the spring temperature rollercoaster across southern Ontario as we head into May.