A Chilly Change Settles In – Fall Jackets Now in Season
SUDBURY – WEATHER – Sudbury may have kicked off this morning with a humid haze, but don’t let the 16°C start fool you. The fog is on its way out, and the autumn air is about to remind everyone that we are, in fact, halfway through September. So, if you were clinging to shorts and T-shirts—this might be your nudge to start transitioning to cozy layers and maybe even the f-word… frost.
Thursday: Cloud Cover and Crisp Breezes
At 7:00 AM EDT, Greater Sudbury Airport reported mainly clear skies with a temperature of 16.1°C, and a very damp humidity level of 94%. The dew point sits at 15.1°C, confirming the clingy, foggy feel in the air. A northerly wind at 14 km/h is beginning to build, expected to strengthen to 20 km/h later this morning. Visibility is excellent at 32 km, once those lingering fog patches clear.
The barometer is currently at 101.6 kPa and falling, signalling that the stable air mass won’t last forever—but today should remain relatively calm. Skies will turn mainly cloudy as the morning progresses, with a high of 18°C and a moderate UV index of 5. It’s not cold by any means, but compared to the sizzle Toronto’s seeing today, it’s a gentle reminder that Northern Ontario doesn’t mess around when autumn arrives.
Tonight: Partly Cloudy With Frost on the Horizon
Tonight will be partly cloudy, and temperatures are set to plunge to just +3°C. There’s a risk of frost, particularly in lower-lying and rural areas—so if you’re still hanging onto summer blooms or sensitive garden plants, tonight might be the time to tuck them in. It’s also the perfect night to rediscover your coziest sweater and maybe put the kettle on.
Friday Through Sunday: Stable, Sunny, and Slowly Warming
Friday, September 19, brings full sun and a high of 18°C, offering a crisp but beautiful day to get outside and breathe in some fresh northern air. Friday night dips again to +3°C, so the frost risk remains, especially in the outskirts.
Saturday, September 20, will bring a mix of sun and cloud, and again a high of 18°C, with the overnight low nudging up to 7°C—slightly milder, but still on the cool side.
Sunday, September 21, gives us a slight warm-up with a high of 20°C under partly sunny skies, and a mild overnight low of 10°C. It’s shaping up to be the kind of weekend that makes you want to visit the farmers’ market or take a long, crunchy-leafed walk through Bell Park.
What to Wear?
Today calls for layered outfits—start with long sleeves and bring a jacket, especially with the wind picking up. Tonight and Friday morning? You’ll want your fall coat, and possibly gloves if you’re heading out early. It’s also time to retire the sandals—trust us.
Weather Trivia: Sudbury’s Frosty Fame
Sudbury’s high elevation and proximity to northern air masses often make it one of the first Ontario cities to experience frost each fall. And yes—frost in mid-September is not unusual here. In fact, Sudbury has seen frost as early as late August, making it a true harbinger of the seasonal shift.
