Rio de Janeiro · May
Run in the morning.
Comfortable average high of 78°F, dipping to 67°F at night. Humidity averages 82% — the limiting factor on most runs. Humidity rises with the sun — morning runs catch the driest, coolest window.
Avg high / low
78° / 67°F
Humidity
82%
Rain days
15/mo
Wind
9 mph
What May feels like in Rio de Janeiro
Sunrise
06:19
Mid-month average
Sunset
17:19
Mid-month average
Time-of-day breakdown
Morning
Coolest, driest air of the day. The window before sunrise is the most reliable comfortable hour.
Midday
Mild but UV and traffic peak. Workable if you don't mind shifting your pace.
Evening
Warm and runnable. Crowded routes but the air's typically calm.
What to wear running in Rio de Janeiro in May
The kit for May in Rio de Janeiro: shorts and a short-sleeve are the standard kit, a water-resistant cap or jacket on standby.
May vs the surrounding months
vs April
-3° avg high
-2 rain days
Rio de Janeiro in April →
May
78°F avg high
15 rain days
Best: morning
vs June
+1° avg high
+3 rain days
Rio de Janeiro in June →
Frequently Asked Questions
What is the best time of day to run in Rio de Janeiro in May?+
Morning. Humidity rises with the sun — morning runs catch the driest, coolest window.
What's the average temperature in Rio de Janeiro in May?+
Average high 78°F, average low 67°F.
How does May compare to surrounding months in Rio de Janeiro?+
Compared to April (avg high 81°F), May is cooler. Compared to June (avg high 77°F), May is warmer.
Does it rain often in Rio de Janeiro in May?+
Expect about 15 measurable rain days in May, on average.