Spring Heat Peaks Today Before a Turn to Showers, Thunder, and a Weekend Cool-Down

GERALDTON – WEATHER REPORT – It’s a warm and sunny start across the Geraldton and Greenstone region this Wednesday morning, with the thermometer already nudging toward 16°C. But as with much of Northern Ontario this week, it’s a classic case of springtime bait and switch. The sunshine won’t last, as clouds, scattered showers, and the risk of an afternoon thunderstorm move in by late day. Expect a stretch of unsettled weather continuing into the weekend, with a dramatic temperature tumble by Saturday night.

Warm Today, Stormy This Afternoon: The Forecast Snapshot

At 5:00 AM EDT, Geraldton Airport reported clear skies and a mild 15.7°C. Humidity is at 83%, with a dew point of 12.8°C, giving the early morning a muggy, almost summery feel. Winds are light from the south at 13 km/h but will pick up later this morning. Barometric pressure is 100.8 kPa and holding steady for now.

Today will start sunny, but by this afternoon, expect a mix of sun and cloud with a 40 percent chance of showers and the risk of a thunderstorm rolling through. Winds will become south at 20 km/h, gusting to 40 km/h by late morning. Temperatures will climb to a balmy 25°C with a humidex of 27, and the UV index will reach 7—high—so sunscreen is still on the must-have list.

Tonight will stay mainly cloudy with a 40 percent chance of showers, especially early in the evening when there is also a risk of a thunderstorm. Winds will ease to light overnight, and the low will dip to 10°C.

Thursday brings a cloudier and cooler day with a 40 percent chance of showers and another risk of an afternoon thunderstorm. Winds will shift from the east at 20 km/h by late afternoon. The high will reach 21°C, but the UV index will drop to 3—moderate—thanks to thicker clouds.

Thursday night will remain cloudy with a 30 percent chance of showers and a low of 12°C.

Friday will be a wet one, with showers expected all day and a cooler high of just 16°C. Skies will finally clear by Friday night, with a low of 9°C.

Saturday brings a return to cloudier skies with a 40 percent chance of showers and a cool high of 14°C. The night will see a sharp drop in temperatures, with cloudy periods and a low plunging to -2°C—yes, welcome to springtime in Greenstone, where winter isn’t ready to fully let go just yet.

Wardrobe and Safety Tips for a Shifty Spring Forecast

Today is a day for layers and keeping the umbrella handy for the afternoon. Be prepared for sudden thunderstorms—stay indoors if skies darken quickly. Thursday and Friday will stay damp, while Saturday’s dramatic cool-down will call for the return of heavier jackets and possibly scraping frost off the windshield again Sunday morning.

Geraldton’s Weather History for May 14

Geraldton’s record high for today is a summery 28.9°C, while the record low is -3.9°C. Today’s forecasted high of 25°C is well above average, but the sudden swing to near-freezing by the weekend is a classic reminder that May in the north can be wildly unpredictable.

Geraldton Weather Trivia

Did you know? Geraldton often sees some of Ontario’s most dramatic spring temperature swings thanks to its location between air masses from the Prairies and the Arctic. It’s not uncommon for the region to see frost advisories just days after heat warnings—and this week is no exception.