Canada looking for its first 30 C after a lacklustre spring so far

Canada has been searching for its first 30-degree reading this year, but as luck may have it, the feat could be achieved before the end of April.

We have experienced a truly Canadian spring so far this year, with a roller-coaster of temperatures and conditions across the country.

The majority of Canada has seen near-normal temperatures with teases of summer. Most major cities have cracked 20°C, so what's next on the checklist? 30°C?

Temperature anomaly last 30 days Canada

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Seeing 30 degrees is not unprecedented across Canada before summer really sets in.

Canada 2025 20 C club

Most major cities have seen the earliest 30°C in April and into May.

We can rule out Western Canada for potentially grabbing the first 30°C reading before the month ends. A more active storm track has spilled across the region with temperatures hovering around the seasonal to below-seasonal mark to end off April.

One place in particular is inching towards the coveted 30-degree mark heading into Tuesday.

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A Colorado low is expected to inch into southern Ontario on Tuesday, and the warm front will be bringing a surge of warm, humid air with it. The southerly flow will bring temperatures close to 30 degrees. Windsor is forecast to be 29°C, but it may just crack the 30-degree mark.

Earliest 30 C daytime highs in Canada

However, it will definitely feel like the low- to mid-30s across southwestern Ontario as a result of the surge of the humid air mass. Portions of southern Ontario will have temperatures feeling like the high 20s.

But it's not all lollipops and rainbows as the warmth comes with a potential price.

Ontario humidex values Tuesday

There is a risk of severe thunderstorms behind the warm front on Tuesday.

While meteorologists see a solid signal for potential thunderstorms, three days in advance is still too soon for specifics on the intensity and precise location of storms—or even if they’ll turn severe.

Ontario thunderstorm energy Tuesday afternoon

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