Weather in August
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.
Frequently asked questions
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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 4min
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 4min
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).
Helsinki, Finland
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