Bangkok · May
Run in the pre-dawn.
Average high is 93°F with a 80°F overnight low. Humidity averages 75% — the limiting factor on most runs. Expect 25 rain days — plan around the radar. Humid heat punishes mid-morning — get out before sunrise for the only truly comfortable window.
Avg high / low
93° / 80°F
Humidity
75%
Rain days
25/mo
Wind
10 mph
What May feels like in Bangkok
Sunrise
05:51
Mid-month average
Sunset
18:37
Mid-month average
Time-of-day breakdown
Morning
Cool relative to the day's peak, but heat builds fast. By 10 AM you're already chasing comfort.
Midday
Heat peaks here. Skip unless you've got shade and pace tolerance.
Evening
Cools off after sunset but still warm. Good for easy efforts; avoid hard intervals if you're chasing pace.
What to wear running in Bangkok in May
The kit for May in Bangkok: light, breathable, and moisture-wicking — singlet or short-sleeve only, a water-resistant cap or jacket on standby.
May vs the surrounding months
vs April
-1° avg high
+9 rain days
Bangkok in April →
May
93°F avg high
25 rain days
Best: pre-dawn
vs June
+2° avg high
-2 rain days
Bangkok in June →
Frequently Asked Questions
What is the best time of day to run in Bangkok in May?+
Pre-dawn. Humid heat punishes mid-morning — get out before sunrise for the only truly comfortable window.
What's the average temperature in Bangkok in May?+
Average high 93°F, average low 80°F.
How does May compare to surrounding months in Bangkok?+
Compared to April (avg high 93°F), May is cooler. Compared to June (avg high 91°F), May is warmer.
Does it rain often in Bangkok in May?+
Expect about 25 measurable rain days in May, on average.