August · Finland
Best time to visit Helsinki in August Weather, crowds & prices
Weather in Helsinki in August
Average temperature 18°C, 86 mm of rain, about 27 days with 6+ hours of sunshine and 80% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
August score
8.2/10
Ranked #4 of 12 months
- Avg temp
- 18°C
- Rainfall
- 86 mm
- Humidity
- 80%
- Days with 6h+ sun
- 27
- Crowd Density
- Peak Tourist Rush
- Average Expenses
- $$$ · Peak Season Rates ($$$)
August in Helsinki scores 8.2/10 for sightseeing and cultural travel - an above-average month (#4 of 12). Expect around 18°C, 86 mm of rain, and roughly 27 days with 6+ hours of sunshine this month.
Helsinki spreads across a Baltic archipelago, with a design-led center, ferry-linked islands, and a strong sauna habit.
August holds up well in Helsinki — 4th best month
Temperatures hover around 18°C (64°F) — the kind of month where neither heat nor cold forces the schedule.
Budget for roughly 86 mm of rain this month — a flexible day or two helps — with about 27 days with 6+ hours of sunshine and 15.6 hours of daylight to work around it.
That is 8.2/10 on the same scale — 4th of 12 months, versus 9.6/10 for the best month here.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
Expect peak pricing, and this is one of the busiest months here.
Frequently asked
- What is the weather like in Helsinki in August?
- In August, Helsinki averages 18°C, 86 mm of rain, and about 27 days with 6+ hours of sunshine. Its climate-comfort score is 8.2/10.
- Is August a good time to visit Helsinki?
- August earns a 8.2/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Helsinki in August?
- Expect about 86 mm of rain in August. Average humidity is 80% and there are about 27 days with 6+ hours of sunshine.
Curated in Helsinki
Tickets & experiences
Things to do in Helsinki
Helsinki, Finland. Live activities and tours from GetYourGuide, matched to this destination.