
Monday Starts Bright and Calm, But Watch for a Stormy Turn by Tuesday Afternoon
Monday, June 16 – Warm, Pleasant, and Nearly Perfect
Toronto kicks off the week on a bright note under mainly sunny skies and a comfortable 15°C as of 6:00 AM at Pearson International Airport. The air is relatively dry for June with 62% humidity and a dew point of 7.6°C. Winds from the north-northeast at 8 km/h make for a calm morning, and visibility is excellent at 24 km. The pressure sits at 101.9 kPa and is trending downward — a quiet start before a possible weather shift.
Expect a beautiful summer day ahead with a mix of sun and cloud and temperatures climbing to a high of 25°C. Factor in the humidity and it will feel closer to 29°C, so it’s a great day for patios, strolls through High Park, or beach lounging at the Island. But don’t forget the sunscreen — the UV index is a scorching 9, rated very high.
Tonight – Mild and Mostly Clear
Tonight will be partly cloudy with a low of 16°C — perfect for sleeping with the windows cracked open or catching a late-night breeze on the balcony. Enjoy it while you can, because Tuesday heats up fast!
Tuesday, June 17 – Heat, Humidex, and Thunderstorm Risk
Summer will flex its muscles on Tuesday. The city will wake up to warm and muggy conditions, with skies offering a mix of sun and cloud. The high will reach 27°C, but with a humidex of 34, it’ll feel like you’re in the tropics — minus the palm trees.
By late morning, winds will shift to the southeast at 20 km/h, ushering in even more moisture. As the afternoon progresses, there’s a 30% chance of showers, and a risk of a thunderstorm to go with the summer heat.
Tuesday night brings cloudy periods and a lingering 30% chance of showers, with a mild low of 17°C.
Wednesday, June 18 – Grey Skies and a Wetter Outlook
Hump day brings cloudy skies and a 60% chance of showers through the day and into the night. Temperatures will ease slightly with a high of 25°C and a low of 18°C — still warm, but not quite as tropical as Tuesday.
What to Wear
Today’s the day for breathable summer fabrics — light shirts, sunglasses, and sunscreen are essentials. Tomorrow, dress for the heat but carry an umbrella or rain jacket, especially if you’re commuting or out in the late afternoon. And for anyone sensitive to humidity — brace yourself.
Weather Trivia – Hot Enough to Fry an Egg?
Toronto’s highest recorded temperature in June was a sizzling 37.8°C, set in 1944. While we’re not quite there yet, humidex values like Tuesday’s are your cue that summer has officially clocked in.