{"id":40197,"date":"2026-05-11T09:55:13","date_gmt":"2026-05-11T09:55:13","guid":{"rendered":"https:\/\/www.europesays.com\/canada\/40197\/"},"modified":"2026-05-11T09:55:13","modified_gmt":"2026-05-11T09:55:13","slug":"another-chill-brings-southern-ontario-a-rare-mid-may-frost-threat","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/canada\/40197\/","title":{"rendered":"Another chill brings southern Ontario a rare, mid-May frost threat"},"content":{"rendered":"

Published on May. 10, 2026, 5:00 PM<\/p>\n

Updated on May. 10, 2026, 5:54 PM<\/p>\n

A good rule of thumb for planting frost-sensitive plants is to wait until after the May long weekend, and this year is no exception.<\/p>\n

A rare, mid-May hard freeze<\/a>, is coming to a city near you.<\/p>\n

A widespread, potentially damaging frost is forecast across a large chunk of southern Ontario this week as we accelerate towards mid-May.<\/p>\n

“Damage to plants, trees, and crops is possible,” warns Environment and Climate Change Canada (ECCC) in the frost advisory. “Cover up plants, especially those in frost-prone areas.”<\/p>\n

\"Key<\/p>\n

SEE ALSO: The ‘3Cs’ you need to know to protect your plants from frost<\/a><\/p>\n

The pattern<\/p>\n

A textbook recipe for a hard-freeze is imminent, with the pattern beginning to develop on Monday. An unusually chilly, high-pressure system migrates in from the northwest on Monday.<\/p>\n

\"Sunday<\/p>\n

By Monday night, the centre of the high with the lightest winds crosses southern Ontario, allowing ground temperatures to reach lower temperatures.<\/p>\n

RELATED: Stuck in a lull: Will pleasant spring weather ever reach Ontario?<\/a><\/p>\n

Wind speeds are forecast to be approximately 5 km\/h in the pre-dawn hours on Tuesday, with even calmer conditions locally likely.<\/p>\n","protected":false},"excerpt":{"rendered":"Published on May. 10, 2026, 5:00 PM Updated on May. 10, 2026, 5:54 PM A good rule of…\n","protected":false},"author":2,"featured_media":40198,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[17,17497,94,58,931,865,60],"class_list":["post-40197","post","type-post","status-publish","format-standard","has-post-thumbnail","category-canada","tag-canada","tag-frost","tag-ontario","tag-rain","tag-snow","tag-southern-ontario","tag-temperatures"],"_links":{"self":[{"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/posts\/40197","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/comments?post=40197"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/posts\/40197\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/media\/40198"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/media?parent=40197"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/categories?post=40197"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/tags?post=40197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}