July 4, 2025: Dryden and Vermilion Bay Weather Report – Heat and Thunderstorm Alert Issued

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DRYDEN – WEATHER – Heading into the weekend, expect a real mixed bag of weather conditions.

Today, residents of Dryden and Vermilion Bay are contending with a dual threat of weather hazards—a Heat Warning and a Special Weather Statement for thunderstorms. With humidex values approaching 39°C and potentially over 40 mm of rainfall, conditions may turn hazardous quickly. Flash flooding, strong winds, and even hail are possible through Saturday morning.

Today’s Weather Overview

Current Conditions

  • Morning Showers gradually easing to mostly cloudy skies

  • Afternoon Forecast: Showers return with a risk of thunderstorms

  • Rainfall: 15 to 25 mm locally

  • Wind: Southwest 20 km/h, gusting to 40

  • Temperature High: 30 °C

  • Humidex: 39 – Very humid and uncomfortable

  • UV Index: 6 – High, sun protection advised between cloud breaks

Tomorrow’s Forecast

Expected Conditions

  • Saturday, July 5: Cloudy start with a 40% chance of morning showers, becoming sunny in the afternoon

    • High: 25 °C | Low: 13 °C

    • Winds: North 20 km/h, gusting to 40

    • Humidity: Drops to comfortable levels

  • Sunday, July 6: Partly sunny and cooler

    • High: 23 °C | Low: 12 °C

Wardrobe Recommendations

  • Today: Light, breathable clothes for the heat—shorts, t-shirts, and a wide-brimmed hat. Bring a light raincoat or umbrella in case of sudden downpours.

  • Saturday & Sunday: Dress in layers—a windbreaker may be helpful in gusty conditions. Enjoy the drop in humidity with comfortable casual wear.


Health & Safety Advisory

  • Heat Precautions:

    • Drink water regularly—even if not thirsty

    • Avoid physical activity during peak heat hours

    • Keep blinds closed and use fans or air conditioning

    • Watch for symptoms of heat exhaustion: dizziness, nausea, fatigue

    • Heat stroke is an emergency – call 9‑1‑1 if symptoms arise

  • Thunderstorm Hazards:

    • Risk of strong wind gusts, hail, and flash flooding in low-lying areas

    • Keep an emergency kit ready and stay indoors during storm activity

    • Avoid driving through water-covered roads or under tall trees

For flood updates, check Ontario.ca/floods.


Weather Trivia

Did you know? On July 5, 1999, a severe thunderstorm dropped over 50 mm of rain on Dryden in under two hours. This led to flash flooding downtown and caused temporary power outages—highlighting the speed at which localized storms can impact infrastructure.

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