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 slightly decrease, reaching an average of 20.1 °C by the end of August.
Expect significant rainfall in Helsinki during August, with an average of 19 rainy days.
Is August a good time to visit Helsinki? check out the best time to travel to Helsinki page.
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12
Dry days
19
Rainy days
0
Snow days
20°/14°
Temperatures
19 km/h
Avg max wind
80 %
Avg humidity
Helsinki in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  18° | 2 19° | 3 20° | ||||
| 4 20° | 5  21° | 6  22° | 7  24° | 8 22° | 9  21° | 10 19° |
| 11 19° | 12  19° | 13 22° | 14 22° | 15 22° | 16  22° | 17 22° |
| 18 19° | 19 19° | 20 19° | 21 20° | 22 20° | 23 19° | 24 20° |
| 25 22° | 26 19° | 27 20° | 28  19° | 29 20° | 30  22° | 31 19° |
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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 | 18° /12° | 6.4 mm | 4 | |
| 2 Aug. | Moderate rain at times | 19° /14° | 7.6 mm | 5 | |
| 3 Aug. | Moderate rain at times | 20° /14° | 8.6 mm | 5 | |
| 4 Aug. | Moderate or heavy rain shower | 20° /14° | 10.1 mm | 5 | |
| 5 Aug. | Cloudy | 21° /14° | 2.5 mm | 5 | |
| 6 Aug. | Overcast | 22° /14° | 0 mm | 6 | |
| 7 Aug. | Sunny | 24° /17° | 0.3 mm | 6 | |
| 8 Aug. | Moderate or heavy rain shower | 22° /15° | 3.9 mm | 6 | |
| 9 Aug. | Partly cloudy | 21° /15° | 1.6 mm | 5 | |
| 10 Aug. | Moderate or heavy rain shower | 19° /13° | 14.2 mm | 4 | |
| 11 Aug. | Overcast | 19° /13° | 1 mm | 5 | |
| 12 Aug. | Patchy rain possible | 19° /12° | 0.5 mm | 4 | |
| 13 Aug. | Partly cloudy | 22° /12° | 0 mm | 6 | |
| 14 Aug. | Patchy rain possible | 22° /15° | 0.1 mm | 5 | |
| 15 Aug. | Partly cloudy | 22° /14° | 0 mm | 6 | |
| 16 Aug. | Heavy rain at times | 22° /16° | 2 mm | 5 | |
| 17 Aug. | Patchy rain possible | 22° /14° | 0.9 mm | 5 | |
| 18 Aug. | Partly cloudy | 19° /13° | 0.6 mm | 6 | |
| 19 Aug. | Moderate or heavy rain shower | 19° /13° | 2.8 mm | 5 | |
| 20 Aug. | Cloudy | 19° /11° | 0 mm | 5 | |
| 21 Aug. | Moderate rain at times | 20° /13° | 0.8 mm | 5 | |
| 22 Aug. | Patchy rain possible | 20° /13° | 3.6 mm | 5 | |
| 23 Aug. | Moderate or heavy rain shower | 19° /12° | 5.4 mm | 4 | |
| 24 Aug. | Moderate or heavy rain shower | 20° /13° | 3.6 mm | 5 | |
| 25 Aug. | Moderate rain at times | 22° /13° | 0.8 mm | 5 | |
| 26 Aug. | Partly cloudy | 19° /14° | 0 mm | 5 | |
| 27 Aug. | Light rain shower | 20° /13° | 3.4 mm | 5 | |
| 28 Aug. | Moderate rain | 19° /12° | 11.9 mm | 5 | |
| 29 Aug. | Overcast | 20° /13° | 0 mm | 5 | |
| 30 Aug. | Light drizzle | 22° /14° | 0.9 mm | 5 | |
| 31 Aug. | Light rain shower | 19° /14° | 17 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 130.4 mm is expected in Helsinki during August, occurring over more than 19 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.
What to pack to Helsinki in August?
As you prepare for your trip to Helsinki in August, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Helsinki, during August, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
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