NetNewsLedger Weather Desk – May 19, 2025 – Northern Ontario is basking in sunshine this Victoria Day Monday, with clear skies forecast for Sudbury, Sault Ste. Marie, and Geraldton. Temperatures are running a few degrees cooler than seasonal averages today, but a gradual warm-up is expected through midweek.
🌞 Sudbury Weather Outlook
Victoria Day in Sudbury brings blue skies and bright sunshine with a daytime high of 13°C, just a touch cooler than the seasonal norm of 18°C. If you’re out for a hike or barbecue, you’ll want a light jacket. Tonight will be clear and cool with a low of +3°C, compared to the average low of 6°C.
Tuesday continues the sunny streak with a high of 16°C, perfect for enjoying the outdoors. The night stays clear with a forecast low of 6°C. Wednesday brings a pleasant mix of sun and cloud and a high near 17°C, followed by cloudy periods and a low of 7°C overnight.
🌤️ Sault Ste. Marie Weather Outlook
A beautiful Victoria Day is in store with sunny skies and a high of 13°C—a little cooler than the seasonal average of 17°C. Tonight, skies remain clear and temperatures dip to +3°C, which is near seasonal for this time of year.
Tuesday will be another sunny day with a high near 15°C. Some clouds roll in overnight, bringing a low of 7°C. Wednesday features a blend of sunshine and cloud cover with daytime highs steady at 15°C, and overnight skies will be mostly cloudy with a low of 7°C.
🌞 Geraldton and Greenstone Region
Geraldton is off to a cool but sunny Victoria Day, with today’s high reaching 13°C, just below the usual 17°C for this time of year. Tonight could see frost in low-lying areas, with temperatures expected to dip to 0°C, two degrees under the typical overnight low.
Tuesday brings a mix of sun and cloud and a high of 16°C. Expect cloudy periods overnight and a slightly milder low of +3°C. Wednesday will again feature a mix of sun and cloud with a high of 17°C, and nighttime brings more cloudy periods and a low of +4°C.
🎒 Wardrobe & Weather Tip
Today is a classic “sunny but deceiving” northern Ontario spring day. While it may look warm out your window, temperatures are still brisk in the mornings. Layer up, especially early in the day or after sunset, and don’t forget the sunscreen—the UV index is high!
🌡️ Did You Know?
Despite being a southern Ontario staple, Sudbury, Sault Ste. Marie, and Geraldton all average fewer than 10 completely clear days in May. So if you’re seeing the sun today, take a moment to soak it in—it’s not as common as it feels this week!
