Temperatures in August
It's pleasantly warm in August in Helsinki with an average temperature of 21°C. Temperatures this month range from a low of 18°C to a high of 23°C. At night, you can expect temperatures between 12°C and 16°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Helsinki in August. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of August
The month of August starts in Helsinki with warm temperatures, averaging around 23°C during the day and nights close to 16°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month.
Mid-August
By mid-August, the average daytime temperature drops to around 21°C, with nights close to 15°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
End of August
By the end of August, the average daytime temperature in Helsinki will be around 19°C, with nights close to 13°C. There’s a significant chance of many days with precipitation.
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Precipitation in August
In August, there is an average of 138 mm of precipitation, spread over 10 days. The wind speed is around 4 Bft, mostly coming from the South.
The average precipitation chance is 33% per day this month. Though it seems pretty low, the weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in August for Helsinki. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Helsinki in August |
London | ||
|---|---|---|---|
 Average Temperature |
21°C | 22°C | |
 High Temp |
23°C | 24°C | |
| Low Temp |
18°C | 19°C | |
 Total Precipitation |
138 mm | 60 mm | |
| Rainy Days |
10 days | 10 days | |
July
UV index
The UV index is a maximum of 5 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is August a good time to visit Helsinki?
After some sun? Then August isn’t the best time to be in Helsinki. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Helsinki in August
With 30°C, Helsinki hit the highest temperature in the last 10 years in August 2023. The lowest daytime temperature in this month was 10°C in 2021. The extreme night temperatures ranged from a low of 5°C to a high of 23°C.
Check out the climate of Helsinki for all months and discover the best travel time
Curious about the climate in other parts of Finland? Check out the weather and climate in places like Rovaniemi, Kuusamo, Tampere, or have a look at other destinations in Finland.
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Daily Temperature in August in Helsinki
This chart shows the average daily temperatures, both day and night, for each day in August in Helsinki, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in August in Helsinki
The chart below shows the average daily precipitation in August for Helsinki, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for August, you can expect around 10 days of rain in Helsinki.
Daily UV Index in August in Helsinki
This chart shows the average daily UV index in August in Helsinki, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in August in Helsinki Over the Years
This chart shows the average temperature in August in Helsinki, measured in degrees Celsius, over the past years.
Total Precipitation in August in Helsinki Over the Years
This chart shows the average precipitation in August in Helsinki, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in August for Helsinki
Click on a specific day in August for detailed info on the typical weather on that day in Helsinki. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in August in Helsinki
Have you been to Helsinki in August?
Share your weather experience in August in Helsinki.
Average Weather in Helsinki by Month
Click on a month below to see detailed weather info for Helsinki. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
