August weather forecastHelsinki, Finland

A scenic reflection in the water of the illuminated city of Helsinki in Finland

August

Weather in August

August marks the transition from summer to autumn in Helsinki, albeit retaining core summer characteristics. Mild temperatures touching a high of 19.8°C (67.6°F) ensures a continued warm ambiance. The highest figure of 80mm (3.15") rainfall may require some adaptation to the frequent showers. Yet, daylight still spans a sufficient 15.6h, sustaining an overall delightful atmosphere. Maritime activities remain favored, credited to a comfortable sea temperature of 16°C (60.8°F).

Temperature

The arrival of August marks a slight shift to an average high-temperature of a comfortable 19.8°C (67.6°F) from July's 21.5°C (70.7°F). An average nighttime temperature of 13.1°C (55.6°F) is recorded during August.

Rainfall

August is the month with the most rainfall in Helsinki. Rain falls for 15 days and accumulates 80mm (3.15") of precipitation.

Snowfall

April through October are months without snowfall.

Sea temperature

August is the month with the warmest seawater in Helsinki, Finland, with an average sea temperature of 16°C (60.8°F).
Note: Most people do not enjoy swimming in water that is 16°C (60.8°F). Breathing becomes increasingly challenging as the water temperature dips under 21°C (69.8°F).

Daylight

In Helsinki, Finland, the average length of the day in August is 15h and 36min.
On the first day of August, sunrise is at 05:01 and sunset at 21:51. On the last day of the month, sunrise is at 06:13 and sunset at 20:27 EEST.

Sunshine

In August, the average sunshine in Helsinki is 7.7h.

UV index

In Helsinki, the average daily maximum UV index in August is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: A maximum high daily UV index of 4 during August translates into the following directions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.

Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In Helsinki, in August, the average high-temperature is 19.8°C (67.6°F), and the average low-temperature is 13.1°C (55.6°F).

The month with the most rainfall is August, when the rain falls for 15 days and typically aggregates up to 80mm (3.15") of precipitation.

In August, in Helsinki, Finland, the rain falls for 15 days. Throughout August, 80mm (3.15") of precipitation is accumulated.

April through October are months without snowfall in Helsinki, Finland.

August is the month with the warmest seawater, with an average sea temperature of 16°C (60.8°F).

In Helsinki, in August, the average water temperature is 16°C (60.8°F). For most, swimming in 16°C (60.8°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

In August, the average day length in Helsinki is 15h and 36min.

In August, on the first day of the month, sunrise is at 05:01 and sunset at 21:51. On the last day of the month, sunrise is at 06:13 and sunset at 20:27 EEST.

The average sunshine duration in August in Helsinki is 7.7h.

The average daily maximum UV index in August in Helsinki, Finland, is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J August S O N D

Jul

August

Sep

Average high temperature

21.5°C

19.8°C

14.6°C

Average low temperature

Average rainfall

Average rainfall days

Average snowfall

0mm

Average sea temperature

Average daylight

Average sunshine

Average UV index

Average temperature in August
Helsinki, Finland

Average high temperature in August: 19.8°C

The warmest month (with the highest average high temperature) is July (21.5°C).
The month with the lowest average high temperature is February (-1.9°C).

Average low temperature in August: 13.1°C

The month with the highest average low temperature is July (14.2°C).
The coldest month (with the lowest average low temperature) is February (-7.4°C).

Average rainfall in August
Helsinki, Finland

Average rainfall in August: 80mm

The wettest month (with the highest rainfall) is August (80mm).
The driest month (with the least rainfall) is April (32mm).

Average rainfall days in August
Helsinki, Finland

Average rainfall days in August: 15 days

The month with the highest number of rainy days is December (20 days).
The months with the least rainy days are April and May (11 days).

Average snowfall in August
Helsinki, Finland

Average snowfall in August: 0mm

The month with the highest snowfall is February (230mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average sea temperature in August
Helsinki, Finland

Average sea temperature in August: 16°C

The best month for swimming (with the highest average sea temperature) is August (16°C).
The coldest months (with the lowest average sea temperature) are February and March (1°C).

Average daylight in August /
Average sunshine in August
Helsinki, Finland

Average daylight in August: 15h and 36min

The month with the longest days is June (Average daylight: 18h and 48min).
The month with the shortest days is December (Average daylight: 6h and 0min).

Average sunshine in August: 7h and 42min

The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is December (Average sunshine: 0h and 54min).

Average UV index in August
Helsinki, Finland

Average UV index in August: 4

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 0).