Boise · May
Run in the morning.
Comfortable average high of 72°F, dipping to 48°F at night. Comfortable conditions all day, but morning consistently delivers the best combination of cool air and clear skies.
Avg high / low
72° / 48°F
Humidity
49%
Rain days
11/mo
Wind
12 mph
What May feels like in Boise
Sunrise
06:19
Mid-month average
Sunset
21:03
Mid-month average
Time-of-day breakdown
Morning
Steady cool air, low wind, and good light. The standard runner window in most months.
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 Boise in May
The kit for May in Boise: a long-sleeve or light jacket for the first mile.
May vs the surrounding months
vs April
+10° avg high
0 rain days
Boise in April →
May
72°F avg high
11 rain days
Best: morning
vs June
-10° avg high
+5 rain days
Boise in June →
Frequently Asked Questions
What is the best time of day to run in Boise in May?+
Morning. Comfortable conditions all day, but morning consistently delivers the best combination of cool air and clear skies.
What's the average temperature in Boise in May?+
Average high 72°F, average low 48°F.
How does May compare to surrounding months in Boise?+
Compared to April (avg high 62°F), May is warmer. Compared to June (avg high 82°F), May is cooler.
Does it rain often in Boise in May?+
Expect about 11 measurable rain days in May, on average.