How To Dress For Hot Weather

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By David Kim, Consumer Tech EditorReviewed by Priya SharmaForecast data: Open-Meteo & Environment and Climate Change Canada

Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the BuzzLayer Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.

For Toronto and the Great Lakes region, the live forecast above shows the heat is on. To stay comfortable, choose lightweight, light-coloured, loose-fitting clothing made of natural fibres like cotton or linen. A wide-brimmed hat and sunglasses are essential, and don’t forget sunscreen on exposed skin.

What fabrics work best in a heat wave?

Natural fibres such as cotton, linen, and bamboo allow air to circulate and wick moisture away from your body. Avoid synthetic materials like polyester or nylon, which trap heat and increase sweating. If you must wear synthetics, look for “cooling” or moisture-wicking technologies.

How should you protect your head and eyes?

A wide-brimmed hat shades your face, ears, and neck — areas that burn easily. UV-blocking sunglasses reduce glare and protect your eyes from harmful radiation. For extra cooling, dampen a neck gaiter with cool water before heading out.

UV IndexCheck Environment Canada’s UV index before heading outside; ratings 7+ require extra protection.

HydrationDrink water every 15–20 minutes, even if you don’t feel thirsty. Avoid caffeine and alcohol.

Heat Illness SignsSymptoms include headache, nausea, dizziness, and muscle cramps. Seek shade and cool down immediately.

Best Times to Go OutPlan outdoor activities before 11 a.m. or after 4 p.m. when the sun is less intense.

Can I wear jeans in hot weather?

Jeans are heavy and absorb sweat, making you feel hotter. Choose loose shorts or lightweight trousers instead. If you prefer denim, pick a loose, light-coloured pair and roll up the cuffs for better airflow.

Is sunscreen necessary on cloudy days?

Yes, up to 80% of UV rays penetrate cloud cover. Apply a broad-spectrum SPF 30+ sunscreen to all exposed skin, even when the sky is overcast. Reapply every two hours or after swimming.

What about hats — do baseball caps work?

Baseball caps leave your ears, neck, and temples exposed. A wide‑brimmed hat or a legionnaire‑style cap with a neck flap provides far better sun protection for those vulnerable areas.