Temperature Guide
Dressing for the Temperature
The same number on a thermometer can feel completely different depending on humidity, wind, and how much the temperature swings over the day. Instead of reacting to a single number, it helps to check the "feels-like" temperature and the day's full range before you decide what to wear or whether to head outside. Here is how each temperature band tends to feel, and the habits that make dressing for it easier.
Updated: July 22, 2026
How to read a forecast properly
The temperature shown in a weather app is air temperature — what your body actually experiences depends on wind, humidity, sunlight, and how active you are. Strong wind makes it feel colder than the number suggests, while high humidity makes heat linger on your skin. If there's a big gap between the morning low and afternoon high, dressing only for midday often means being underdressed by evening, so it pays to check the day's low and high together rather than just "today's temperature."
- Check the daily low, high, and feels-like temperature together, not just one number
- If rain or wind is expected, carry a light jacket or umbrella as backup
- Account for the gap between indoor spaces (office, subway) and the outdoors when layering
- For long outdoor plans, build in rest breaks and a hydration plan ahead of time
30°C and above — Hot
This is the range where heat fatigue and dehydration risk climb quickly. Body temperature rises fast and focus can slip, so it helps to break outdoor time into shorter stretches and seek shade and water often. High humidity is especially deceptive, since sweat can't evaporate efficiently, making the heat feel worse than the thermometer suggests. If you notice a headache, dizziness, nausea, or unusual fatigue, stop pushing through it — get somewhere cool and rest first.
- Try to avoid outdoor activity between 11am and 4pm
- Wear breathable, sweat-wicking clothing along with a hat and sunscreen
- Drink water on a schedule, not just when you feel thirsty
- Rest in the shade immediately if you feel dizzy or nauseated
- Even with A/C or a fan running, keep airflow and hydration going at the same time
20–29°C — Comfortable to warm
This is a pleasant range for activity, but a large gap between morning and evening temperatures can make temperature regulation tricky. It might feel fine when you leave in the afternoon, but cool off noticeably by evening — keeping a light layer on hand helps prevent catching a chill. On days when your activity level changes, like a workout or commute, it's safer to dress for the temperature you'll return in rather than the temperature you leave in.
- Keep one light layer in your bag just in case
- Put a layer back on right after exercise once you start cooling down and sweating
- Bring a long-sleeve or cardigan for spaces with strong air conditioning
- During seasonal transitions, cover your neck and midsection to soften sudden temperature swings
10–19°C — Cool
This range tends to bring more colds and muscle tightness. Keep heat-losing areas like your neck and wrists warm, and use layers you can adjust as needed. Wind can make it feel noticeably colder than the number implies. If you're sitting still for long stretches — studying, working at a desk — your feet and shoulders often cool first, so a light jacket or a lap blanket indoors can make a real difference.
- Layer clothing so you can add or remove pieces as your activity level changes
- Use a scarf when moving between very different indoor and outdoor temperatures
- Keep your shoulders and knees warm during long periods of sitting
- Prioritize a windproof jacket for cycling or scooter commutes
Below 10°C — Cold
This is the range where blood vessels constrict and hypothermia risk becomes real. Minimizing exposed skin and wearing a wind-blocking outer layer is the key move. Fingers and toes cool first, so gloves and warm footwear matter. Temperatures tend to drop even faster in the early morning and at night, and roads can be slippery, so even a short errand deserves both warm layers and careful footing.
- Make a windproof coat or padded jacket non-negotiable
- Protect your extremities with gloves, a hat, and hand warmers
- Watch for icy patches and sharper temperature drops during early morning or night trips
- Change out of wet clothes or socks right away to prevent losing body heat
Outfit checklist
When a day spans multiple temperature bands, or your schedule runs long, a "base outfit plus an adjustable outer layer" combination rarely lets you down. Clothing recommendations on a weather app already factor in feels-like temperature, rain, and wind, so treat them as a starting point and add or remove a layer based on your commute and how warm your indoor spaces run.
- Map out your day first — commute, outdoor plans, exercise — before picking an outfit
- Toss a light jacket, spare socks, and a handkerchief in your bag
- If rain or snow is forecast, prioritize waterproofing and slip resistance
- When out with kids or older family members, dress them one notch warmer than yourself