19°C (66°F) is the number that causes the most hesitation. One degree below the 20 that many people treat as their threshold, one degree above the 18 that many people see as the lower limit, even though the real line is a feels-like of 15°C. And that is exactly why the number itself tells you almost nothing: at 19°C, sun and wind decide practically on their own whether shorts are comfortable.
Why 19 degrees is such an awkward number
At 19°C the feels-like temperature ranges from roughly 12°C to 25°C. That is a thirteen-degree spread at an identical thermometer reading. At 25°C wind makes a difference too, but it stays warm enough regardless. At 19°C the threshold sits right in the middle: one 19-degree day is summery, the next calls for long trousers.
Sun and wind at 19 degrees
| Scenario | Air temperature | Feels-like temperature |
|---|---|---|
| Sunny, no wind | 19°C | ~24–25°C |
| Overcast, no wind | 19°C | ~18°C |
| Overcast, 20 km/h wind | 19°C | ~15°C |
| Overcast, 35 km/h wind | 19°C | ~12°C |
| Rain, 15 km/h wind | 19°C | ~14°C |
Can you wear shorts today?
Check it now for your location — free, no account needed.
The sun counts for more than the degree
At these temperatures, direct sunlight adds 5 to 6 degrees to what your skin registers. The difference between 18, 19 and 20 degrees is one degree. The difference between sun and cloud is five. So if you only check the thermometer at 19°C, you are watching the smaller of the two numbers.
In practice that means 19°C under a clear blue sky feels warmer than 22°C under a thick cloud deck. The thermometer gives you exactly the wrong advice.
Wind is the decider at 19 degrees
Up to force 2 (around 10 km/h) your legs barely notice the wind. From force 3 it starts to matter, and at around force 4 (25 km/h) the feels-like drops below 14°C. Bare skin then loses heat faster than your body can replace it.
On the coast this is often the difference between yes and no. The same 19°C with a sea breeze is regularly too chilly on the beach, while twenty kilometres inland it is perfectly good shorts weather.
How to decide in practice
Three questions, in this order:
- Is the sun out? If so, shorts at 19°C are almost always fine.
- Is the wind above force 3? If so, and it is overcast, most people will find it too cool.
- Will you be moving or standing still? Cycling and walking generate extra body heat. Sitting on a terrace does not.
Conclusion
At 19°C there is no default answer. With sun and little wind it is comfortable shorts weather; with cloud and wind it is not. Check the feels-like temperature and the chance of sunshine, not the single degree that separates it from 18 or 20.
Learn more
Read next
Can I wear shorts at 18 degrees? Yes, if it's sunny
18°C (64°F) is shorts weather when the sun is out: it feels like 23°C. Overcast and windy it feels like 14°C and trousers are the better call.
Can I wear shorts at 20 degrees? Usually, yes
Yes, 20°C (68°F) is usually shorts weather. Only overcast skies with wind or rain drop the feels-like to 13–16°C. When to think twice.
Can I wear shorts at 17 degrees? With sun, yes
At 17°C shorts work, but only with sun or little wind. Overcast with a steady breeze it feels like 13°C, and long trousers are the better call.
Can I wear shorts at 21 degrees? Almost always
Yes: at 21°C (70°F) shorts are fine for almost everyone. The one exception is overcast and windy at once, when it feels like 14°C.
Why 20 degrees is not always shorts weather
20°C sounds like it should be comfortable. And often it is. But add enough wind or cloud cover and it stops feeling that way fairly quickly.