What weather is T-shirt weather?
Short answer: A T-shirt from 16°C (61°F) feels-like, a tank top and thin clothes from 21°C (70°F). Rain pulls the level down to cardigan weather, and 38°C (100°F) and above is extreme heat.
T-shirt weather is the day you finally put the heavy layers away. The temperature is only part of the answer.
T-shirt and tank-top temperatures
| Feels like | What to wear | Note |
|---|---|---|
| 38°C (100°F) and above | Stay in | Extreme heat. Shade, water, avoid midday. |
| 21 - 37°C (70 - 99°F) | Tank top, thin cotton or linen, shorts | Sunscreen and a hat. |
| 16 - 20°C (61 - 68°F) | T-shirt, light trousers | Thin layer for the evening. |
Check before you go T-shirt only
- Rain: if wet, the level drops to cardigan weather, take a light jacket.
- Evening: a big day-night swing means a layer in the bag.
- Indoors: offices and trains can be colder than outside.
- Your climate: 18°C is summer in the Netherlands and cool in Adana. HIRKA shifts its limits to your location.
See also what to wear by temperature and layering for changing weather.
Frequently asked questions
What temperature is T-shirt weather?
On HIRKA's baseline scale 16°C (61°F) feels-like and above. At the "Normal" setting about 18°C (64°F).
Is 20°C T-shirt weather?
Yes, a T-shirt and thin trousers during the day. Carry a thin cardigan if you will be out in the evening.
Can I wear a T-shirt in the rain?
In warm rain yes, but HIRKA treats a wet day as cardigan weather at least, because wet fabric and wind chill you quickly.
When is it too hot to go out?
At 38°C (100°F) feels-like and above HIRKA says stay in. The limit moves up to 46°C in very hot climates. Stay in shade, drink water and avoid midday.
HIRKA tells you what to wear. The app is on the App Store and Google Play. Discover the app or visit support.
Related guides
What to wear todayA 30-second weather checklist before you leave the door.What temperature do you wear a coat?Coat, heavy coat and scarf limits in °C and °F.What temperature do you wear a cardigan?Cardigan, sweater and light jacket ranges.What to wear by temperatureA feels-like temperature chart in °C and °F.What is "Hırka havası" (cardigan weather)?The four levels, their thresholds and how they adapt to you.Layering for changing weatherThe three-layer rule for cool mornings and warm afternoons.What to wear in rain and windWind lowers the feels-like temperature, rain changes what you wear.