25°C needs no permission. The question isn't whether you can wear shorts — it's whether you'll be comfortable enough, or whether the heat becomes an issue.
Heat, not cold, is the factor
At 25°C in direct sun with low wind, the feels-like temperature often exceeds 28–30°C. That's warm. Shorts help with that: less fabric means less trapped heat and better air circulation around your legs.
High humidity at 25°C is when it gets sticky. At 80% humidity and 25°C the heat index reaches around 28–29°C. Still manageable in shorts — long trousers would make it worse.
When it might feel too warm
Sitting in full sun at 25°C on a dark surface (tarmac, stone) can feel very hot on exposed legs. The surface temperature of asphalt in direct sun can reach 50°C or more. A beach towel or sitting somewhere shaded solves this.
Can you wear shorts today?
Check it now for your location — free, no account needed.
Is there a reason not to wear shorts at 25°C?
Practically no. Some workplaces or venues have dress codes. Some people find their legs get sunburned more easily at this temperature if they're outside for hours. SPF on exposed skin is worth considering from around 24–25°C onwards on sunny days.