Helsinki
August
Weather in Helsinki for August 2025
Your guide to Helsinki weather in August - trends and predictions
In general, the average temperature in Helsinki at the beginning of August is 20.6 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 19.6 °C by the end of August.
Helsinki experiences heavy rainfall in August, with over 20 rainy days and an average total precipitation 100.6 mm.
Temperatures
Rain 🌧️
4
Dry days
27
Rainy days
0
Snow days
20°/14°
Temperatures
19 km/h
Avg max wind
77 %
Avg humidity
Helsinki in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  19° | 2  20° | 3 20° | ||||
| 4  21° | 5  22° | 6  21° | 7 21° | 8 21° | 9 21° | 10 20° |
| 11 21° | 12 21° | 13 22° | 14 22° | 15 21° | 16  22° | 17 22° |
| 18 20° | 19 20° | 20 20° | 21  20° | 22 20° | 23 19° | 24 18° |
| 25 20° | 26 19° | 27 20° | 28 21° | 29 20° | 30 19° | 31 18° |
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Temperatures trend during August in Helsinki
See the weather trend as well as the moving average line
August weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. | Moderate or heavy rain shower | 19° /13° | 7.1 mm | 4 | |
| 2 Aug. | Cloudy | 20° /14° | 3.9 mm | 5 | |
| 3 Aug. | Moderate rain at times | 20° /12° | 4.7 mm | 5 | |
| 4 Aug. | Patchy rain possible | 21° /14° | 5.1 mm | 5 | |
| 5 Aug. | Partly cloudy | 22° /14° | 1.2 mm | 6 | |
| 6 Aug. | Sunny | 21° /13° | 1.7 mm | 5 | |
| 7 Aug. | Moderate rain at times | 21° /15° | 1.3 mm | 6 | |
| 8 Aug. | Moderate or heavy rain shower | 21° /14° | 4.3 mm | 5 | |
| 9 Aug. | Partly cloudy | 21° /14° | 2.2 mm | 5 | |
| 10 Aug. | Patchy rain possible | 20° /13° | 7.4 mm | 5 | |
| 11 Aug. | Partly cloudy | 21° /14° | 0.7 mm | 5 | |
| 12 Aug. | Patchy rain possible | 21° /13° | 1.1 mm | 5 | |
| 13 Aug. | Moderate or heavy rain shower | 22° /14° | 0.5 mm | 6 | |
| 14 Aug. | Moderate or heavy rain shower | 22° /15° | 2 mm | 5 | |
| 15 Aug. | Sunny | 21° /14° | 2.4 mm | 6 | |
| 16 Aug. | Overcast | 22° /16° | 2.2 mm | 5 | |
| 17 Aug. | Moderate or heavy rain shower | 22° /15° | 7.6 mm | 5 | |
| 18 Aug. | Partly cloudy | 20° /14° | 2.7 mm | 5 | |
| 19 Aug. | Moderate or heavy rain shower | 20° /14° | 5.1 mm | 5 | |
| 20 Aug. | Cloudy | 20° /13° | 0.1 mm | 5 | |
| 21 Aug. | Heavy rain at times | 20° /14° | 1.2 mm | 5 | |
| 22 Aug. | Patchy rain possible | 20° /13° | 2.9 mm | 5 | |
| 23 Aug. | Patchy rain possible | 19° /11° | 2.7 mm | 4 | |
| 24 Aug. | Overcast | 18° /12° | 2.1 mm | 4 | |
| 25 Aug. | Moderate or heavy rain shower | 20° /12° | 7.3 mm | 5 | |
| 26 Aug. | Patchy rain possible | 19° /13° | 2.2 mm | 5 | |
| 27 Aug. | Patchy rain possible | 20° /13° | 1.8 mm | 5 | |
| 28 Aug. | Partly cloudy | 21° /13° | 6 mm | 5 | |
| 29 Aug. | Overcast | 20° /14° | 0.7 mm | 4 | |
| 30 Aug. | Partly cloudy | 19° /12° | 2 mm | 5 | |
| 31 Aug. | Partly cloudy | 18° /11° | 8.6 mm | 4 | |
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Important Notice
Our weather forecast for Helsinki in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Helsinki forecast closer to your planned date for the most up-to-date weather information.
Helsinki in August - FAQ
What are the expected maximum and minimum temperatures in Helsinki during August?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Helsinki during August?
Significant rainfall exceeding 100.6 mm is expected in Helsinki during August, occurring over more than 27 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Helsinki during August?
The average wind speed in Helsinki during August is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Helsinki
Explore the daily rainfall trends and prepare for Helsinkis August weather 💧
UV exposure in Helsinki during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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