Cool Morning Gives Way to a High of 21°C as the Nickel City Embraces Late-May Warmth
From Morning Fog to Afternoon Glow – Sudbury’s Spring Forecast Has It All
SUDBURY – WEATHER – Monday, May 26, 2025 – The new week is off to a fresh and bright start in Greater Sudbury, with fog slowly lifting to reveal mainly sunny skies and mild spring air. While the early morning hours were a touch brisk, today is shaping up to be a classic late-May day, with warm sunshine and a high of 21°C.
As of 5:00 AM EDT, conditions at Sudbury Airport were mainly clear with a temperature of 8.5°C and a dew point of 4.5°C, producing a relative humidity of 76%. Winds are from the north at a light 15 km/h, visibility is strong at 24 km, and the barometric pressure is 102.4 kPa and rising—a strong sign that we’re in for fair weather, at least for now.
Today’s forecast promises sunny skies for most of the day, with fog patches dissipating this morning. The UV index hits 7, which is high—so even under cooler conditions, sun protection is important if you’re out and about.
Tonight will bring just a few clouds and a low of 6°C, making for a peaceful, cool evening.
What’s Coming Next: Sunshine Early, Showers Later
Tuesday will be another winner, with sunshine early and a mix of sun and cloud near noon. Temperatures will climb a bit higher, reaching a pleasant high of 22°C with the UV index once again at 7. Clouds increase Tuesday night, with cloudy periods and a mild low of 12°C.
Wednesday turns the page toward a damper trend, with cloudy skies and a high of 20°C, followed by a 60 percent chance of showers overnight and a low of 10°C.
Thursday continues the unsettled pattern, with cloudy skies and another 60 percent chance of showers, and a cooler high of 15°C. The rain risk lingers into the night, with cloudy periods and a 40 percent chance of showers, and another mild low of 10°C.
Wardrobe Suggestion
A light jacket or hoodie will do the trick this morning, but you’ll want to shed layers by early afternoon. Toss on a hat and apply sunscreen—especially if you’re heading out for a walk, hike, or errands in the midday sun.
Weather Trivia: Sudbury’s Foggy Secrets
Did you know? Sudbury’s landscape of rock and lakes creates ideal conditions for early morning radiation fog, especially in spring. When calm, cool nights meet clear skies, all that heat escapes—and fog forms right where it pooled the day before.
