From Clear Skies to Cotton Skies – Sudbury’s Forecast is a Mixed Bag

Sudbury starts sunny but cold, with snow arriving tonight and continuing into Monday. Wind chills linger, and the week stays snowy and chilly overall

Sudbury, ON – Sunday, March 23, 2025 – Sudburians woke up to a crisp and clear morning that practically sparkles under the sunshine. But don’t let the beautiful blue skies trick you – winter is still calling the shots. While today brings a sunny reprieve, snow is knocking on the door tonight and into Monday, making it clear that spring isn’t quite ready to take the reins just yet.

A Glorious (and Glacial) Start to Sunday

As of 5:00 AM EDT, the mercury at Greater Sudbury Airport sits at a frosty -16.3°C. With only a whisper of wind from the west-northwest at 3 km/h, the wind chill hovers around -19. Humidity is at 78%, and the barometric pressure is steady and rising at 102.3 kPa – the kind of pressure change that signals some fair, though brief, weather.

Today’s sunshine will stick around most of the day, and winds will shift southward and strengthen to 20 km/h this afternoon. Temperatures will climb to a high of -1°C, though the morning wind chill of -23 will make for a bitter start. Even by afternoon, it will still feel closer to -5°C. The UV index hits a moderate 4, so throw on a bit of sunscreen if you’re soaking up the rays – yes, even in -16°C, you can still catch a sunburn!

Tonight – Snow Creeps In After Midnight

After basking in that sunshine, tonight takes a turn. Clouds will gradually move in through the evening, with snow expected to begin after midnight. We could see 2 to 4 cm by morning. Winds will shift again, this time from the east at 20 km/h and gusting up to 40 km/h, giving a slight wind chill bite. Overnight temperatures will dip to -6°C, but it will feel more like -12°C with that gusty wind.

Monday and Tuesday – A Snowy and Chilly Duo

Monday brings more snow, with 5 cm expected to blanket the region. Winds will remain from the east at 20 km/h, gusting to 40, but will ease later in the morning. The daytime high will be -2°C, and wind chills will make it feel like -14 in the morning and -6 by afternoon. The UV index slips down to a low 1 – a good day to focus on staying warm rather than sun-kissed.

Monday night remains cloudy with a 60% chance of flurries and a low of -7°C. On Tuesday, expect continued cloudy skies and a 40% chance of flurries with a high near -2°C. The night cools down further to -10°C with a 30% chance of light snow.

Wardrobe Wisdom – Bundle Smart, Not Bulky

Layer up with insulated outerwear and a wind-resistant jacket today. A good base layer and thermal gloves are your best bet for staying warm during that harsh wind chill. Add a scarf and toque for style points and survival. As snow moves in overnight and into Monday, waterproof boots will be essential – you don’t want soggy socks sabotaging your Monday mood.

Historical Weather Trivia – March Madness, Weather-Style

Did you know that Sudbury’s warmest March 23rd ever hit a surprising 14.2°C in 2012? On the other end of the spectrum, the coldest recorded was a bone-numbing -26.1°C back in 1974. So if you’re feeling a little grumbly about today’s -16°C, just remember – it could be much worse.