From Clear Skies to Showers as Sudbury’s Spring Rollercoaster Rolls On

SUDBURY – WEATHER REPORT – Greater Sudbury is off to a mild and humid start this Wednesday morning, as clear skies and unseasonably warm temperatures kick off what promises to be a damp, foggy, and cooler couple of days ahead. The city is enjoying an early taste of summer warmth today, but the change is lurking right around the corner as showers, drizzle, and fog make a return appearance.

From Muggy Mornings to Damp Days: Sudbury’s Midweek Forecast

At 5:00 AM EDT this morning, Greater Sudbury Airport reported clear skies and a warm 15.4°C. The humidity is sitting at a saturated 93%, thanks to a dew point of 14.2°C, making the air feel thick and muggy even before sunrise. Winds are from the southeast at 14 km/h, with excellent visibility of 24 km. The barometric pressure is at 101.4 kPa but falling—a sign that the pleasant start will be replaced by unsettled conditions soon.

Today will start mainly clear before clouds begin to fill in later this morning. The high will climb to a warm 17°C under mostly cloudy skies, with winds becoming southeast 20 km/h by late afternoon. There is a 30 percent chance of showers or drizzle developing in the afternoon, and fog patches will add a layer of springtime mystery. The UV index will hold at a moderate 5, lower than usual thanks to the cloud cover.

Tonight will remain cloudy with a 30 percent chance of showers or drizzle, and fog patches will develop thickening overnight. The low will sit at 13°C, adding to the muggy, damp feel.

Thursday will see a mix of sun and cloud with a 30 percent chance of showers, especially in the afternoon. The high will rise to 22°C, with humidex values making it feel closer to 26°C—yes, Sudbury gets sticky too. The UV index will bump back up to 7—high. Thursday night will bring increasing cloudiness and a mild low of 14°C.

Friday will see showers dominate the day, with a cooler high of 17°C and more rain expected into Friday night, where the low will dip to 11°C.

Saturday will bring a break from the showers, but clouds will linger, with a high of 18°C and a cloudy night dropping to 9°C.

What to Wear for Sudbury’s Soggy Spring Stretch

Today is your chance to enjoy short sleeves in the morning, but keep a raincoat handy by the afternoon. Thursday will be muggy but still overcast—perfect for lightweight, breathable layers. Foggy mornings midweek will also call for extra caution if you’re hitting the road early.

Sudbury’s Weather History for May 14

Sudbury’s record high for today is a summery 28.3°C, while the record low is -2.8°C. Today’s expected high of 17°C and the warm, muggy start is comfortably above average but well shy of any records.

Sudbury Weather Trivia

Did you know? Sudbury’s rocky Canadian Shield landscape and nearby lakes can trap moist air masses, often leading to persistent fog and drizzle when warm, humid air clashes with lingering cool surfaces—like we’ll see tonight and Thursday morning.