Helsinki · August
Run in the morning.
Cool month: average high 68°F, low 57°F. Humidity averages 79% — the limiting factor on most runs. Expect 17 rain days — plan around the radar. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
Avg high / low
68° / 57°F
Humidity
79%
Rain days
17/mo
Wind
13 mph
What August feels like in Helsinki
Sunrise
05:36
Mid-month average
Sunset
21:11
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 Helsinki in August
The kit for August in Helsinki: shorts and a short-sleeve are the standard kit, a water-resistant cap or jacket on standby.
August vs the surrounding months
vs July
-1° avg high
-2 rain days
Helsinki in July →
August
68°F avg high
17 rain days
Best: morning
vs September
+8° avg high
+3 rain days
Helsinki in September →
Frequently Asked Questions
What is the best time of day to run in Helsinki in August?+
Morning. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
What's the average temperature in Helsinki in August?+
Average high 68°F, average low 57°F.
How does August compare to surrounding months in Helsinki?+
Compared to July (avg high 69°F), August is cooler. Compared to September (avg high 59°F), August is warmer.
Does it rain often in Helsinki in August?+
Expect about 17 measurable rain days in August, on average.