Helsinki
Finland
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Helsinki, Finland

A scenic reflection in the water of the illuminated city of Helsinki in Finland, viewed from the water
A scenic reflection in the water of the illuminated city of Helsinki in Finland, viewed from the water
The last month of the summer, August, is also an enjoyable month in Helsinki, Finland, with average temperature varying between 13.1°C (55.6°F) and 19.8°C (67.6°F).

Temperature

In Helsinki, the average high-temperature is essentially the same as in July - a comfortable 19.8°C (67.6°F). In Helsinki, the average low-temperature is 13.1°C (55.6°F).

Rainfall

The month with the most rainfall in Helsinki, Finland, is August when the rain falls for 15 days and typically aggregates up to 80mm (3.1") of precipitation.

Snowfall

Throughout the year, 740mm (29.1") of snow is accumulated.

Sea temperature

August is the month with the warmest seawater, with an average sea temperature of 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).

Daylight

In Helsinki, the average length of the day in August is 15.6h.

Sunshine

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

UV index

In Helsinki, the average daily maximum UV index in August is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to the Sun's UV rays for the ordinary person.
The average daily UV index of 4 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in August in Helsinki?

In Helsinki, Finland, 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).

How much does it rain in Helsinki in August?

In August, in Helsinki, Finland, the rain falls for 15 days. Throughout August, 80mm (3.1") of precipitation is accumulated.

What is the rainiest month in Helsinki?

The month with the most rainfall in Helsinki, Finland, is August when the rain falls for 15 days and typically aggregates up to 80mm (3.1") of precipitation.

What month is the sea warmest in Helsinki?

The month with the warmest seawater in Helsinki, Finland, is August, with an average sea temperature of 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).

How cold is the water in August in Helsinki?

In Helsinki, Finland, the average seawater temperature in August is 16°C (60.8°F). Swimming in 16°C (60.8°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

What is the average length of the day in August in Helsinki?

The average length of the day in August in Helsinki, Finland, is 15.6h.

How long on average sun shines in August in Helsinki?

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

What is the UV index intensity in August in Helsinki?

In Helsinki, Finland, the average daily maximum UV index in August is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to the UV radiation.
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 lowest 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).
Months with the lowest number of 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).
Months with the lowest 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).
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: 15.6h

The month with the longest days is June (Average daylight: 18.8h).
The month with shortest days is December (Average daylight: 6h).

  • Average sunshine in August: 7.7h

The month with most sunshine is June (Average sunshine: 9.9h).
The month with least sunshine is December (Average sunshine: 0.9h).

Average UV index in August - Helsinki, Finland
  • Average UV index in August: 4

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