Weather in Helsinki for the month
The full August calendar: model forecast through August 30, then the long-term climate normal.
🔮 What August will be like
📅 August calendar2-week forecast →
🌅 August astronomy
🌊 Water in August
📒 Weather diary in Helsinki
Ready-made observation table for August: past days are already filled in with weather-station data — for school and beyond. Open the diary →
✉️ Weather forecast by email
Get the forecast for this city by email — every day at 17:00 Moscow time.
FAQ about weather in Helsinki ❓
What will the weather be like in August in Helsinki?
The forecast part of August: +16°…+22° by day, 2 of 11 days rainy.
When are the best days of August?
The forecast points to 25–26 August: +21°, precipitation 6%. Models don’t see beyond two weeks — check back, the page updates daily.
How accurate is a monthly forecast?
Honestly: models are reliable up to ~14 days. So through August 30 we show the model forecast, and beyond that — each day’s climate normal from long-term observations (ERA5). It is a statistical expectation, not a guarantee.
Weather in Helsinki — in detail
Weather forecast in Helsinki for the month: from +13° to +22° day and night. Warmest day — Monday, August 24 (up to +22°). Coolest — Friday, August 21 (+13°). Precipitation chance up to 83%. Trend: it warms toward the end. See also the forecast for 2 weeks and the weather archive.
To quickly check the weather in Helsinki anytime, add the city to favorites — and get a daily forecast by email at 17:00 (Moscow time). Note: the forecast may be refined as new data arrives. Data: OpenWeather, Open-Meteo, met.no.