NetNewsLedger Weather Desk – Tuesday, May 20, 2025
Good morning from a very crisp Greater Sudbury, where frost is biting through the early hours of this spring day. If you’re just waking up and peeking out the window wondering if winter made a comeback—you’re not alone.
Sudbury is currently sitting at -1°C, with a biting wind chill of -7°C, thanks to brisk northeast winds at 26 km/h. The humidity is at 73%, and the barometric pressure sits at 102.4 kPa and falling, indicating some changes in the works. The sky is clear, but don’t let that fool you—it’s a cold start.
Frost Advisory in Effect
Environment Canada has issued a Frost Advisory for Greater Sudbury. Near-freezing temperatures early this morning may damage sensitive plants and crops, especially in low-lying frost-prone areas. If you haven’t already, it’s a good idea to cover your gardens and hanging plants—or at least give them a warm wish.
Today – Sunshine and a Chill in the Air
Sunshine will take over as skies clear this morning, but those gusty northeast winds (up to 40 km/h) will keep it feeling brisk despite a forecasted high of 15°C. The UV index climbs to a strong 7, so don’t forget your sunscreen if you’re out soaking up the rays.
Tonight – Clouding Over Again
Skies will become increasingly cloudy early this evening, though winds will ease slightly, only to pick up again overnight. Expect a low of 6°C—a more seasonal night ahead compared to this morning’s frosty dip.
Wednesday – Clouds Roll In
Expect a mostly overcast day, with steady northeast winds continuing at 20 km/h, gusting to 40. Temperatures will reach a cool 13°C, and cloud cover will keep the UV index to a more moderate 4. There’s a 40 percent chance of showers by nightfall, and temperatures will drop to 7°C.
Looking Ahead
Thursday brings continued cloud cover with a 30 percent chance of showers, and a high of 12°C. The pattern continues into the evening with a low of 5°C.
What to Wear:
Layer up this morning—especially if you’re out before the sun gets to work. A light jacket will still be needed during the day, and you might want a scarf if you’re battling that wind. Don’t forget your sunscreen, especially in the midday sun.
Sudbury Weather Trivia:
The record low for May 20 in Sudbury is a chilly -4.4°C, set back in 1973. While today isn’t quite that frosty, it’s a good reminder that spring in Northern Ontario likes to keep us guessing.
