Helsinki weather in August
Helsinki in August averages 17°C (63°F), 84 mm of rain and 7.6 hours of sun a day.
Of the twelve months in Helsinki, August is the second warmest, the wettest and the fourth sunniest.
- Average temp
- 17°C (63°F)
13–21°C · 56–69°F
- Rainfall
- 84 mm
Showers likely
- Sunshine
- 7.6 h
hours per day
What is Helsinki like in August?
Daytime
Days are mild.
Rain
Some rain is likely; pack for showers.
Evening
Evenings are cooler. A layer helps after sunset.
What should I pack for Helsinki in August?
A light rain jacket
About 84 mm falls this month — showers rather than washouts.
A layer for the evening
Evenings cool off noticeably once the sun is down.
August compared with July and September
August in Helsinki is 1.2°C cooler than July and 26 mm wetter than it, which averages 18°C (65°F).
August in Helsinki is 4.8°C warmer than September and 30 mm wetter than it, which averages 12°C (54°F).
Daylight in Helsinki in August
On 15 August the sun is up for 15 hours 39 minutes in Helsinki, rising about 05:34 and setting about 21:13 local time.
August ends 2 hours 37 minutes shorter than it begins, so the last week of the month is a different length of day from the first.
That is 3 hours 14 minutes short of June, the longest-lit month here.
Where to stay in Helsinki
Dates are a starting point for August.
Travel guides for Helsinki
What to read before you book.
Helsinki weather by month
TemperatureRainfall
How August compares with the rest of the year
August is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | -3°C / 26°F | 54 mm |
| February | -4°C / 25°F | 38 mm |
| March | -1°C / 31°F | 35 mm |
| April | 5°C / 40°F | 32 mm |
| May | 10°C / 51°F | 41 mm |
| June | 15°C / 59°F | 56 mm |
| July | 18°C / 65°F | 58 mm |
| August | 17°C / 63°F | 84 mm |
| September | 12°C / 54°F | 55 mm |
| October | 7°C / 44°F | 75 mm |
| November | 2°C / 36°F | 70 mm |
| December | -1°C / 30°F | 59 mm |
Similar weather in August
Other destinations whose August averages sit close to this one.
Check another month
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FAQs about Helsinki in August
August climate averages for Helsinki, 1991–2020.
Helsinki averages 17°C (63°F) in August, ranging from about 13°C (56°F) at night to 21°C (69°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 84 mm falls across August, enough to need a light jacket but not enough to reshape a trip.
Yes. August averages 17°C (63°F) against 12°C (54°F) in September — 4.8°C warmer.
August is 1.2°C cooler than July, and 26 mm wetter.
Yes. August falls inside the most comfortable stretch of the year here, May to October, on temperature and rainfall together.
About 7.6 hours of sun a day on the 1991–2020 average.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what August is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 15 hours 39 minutes of daylight in mid-August, against 18 hours 53 minutes in June and 5 hours 52 minutes in December.
On 15 August, sunrise is about 05:34 and sunset about 21:13 local time. Both shift across the month — the month ends 2 hours 37 minutes shorter than it starts.
