Helsinki in August usually sees fair weather conditions, with an average daily high temperature of +66°F and roughly 8 sunny days. However, you should prepare for about 15 rainy days with an average precipitation of 83 mm. The weather is changeable so pack for every eventuality. Search flightsin one click on Avionero.
Average weather
☀️
+66°F
Avg. max. temperature
+37°F
Min.
+84°F
Max.
83 mm
Total precipitation
76%
Avg. humidity
3 m/s
Avg. wind
8 ☀️
Sunny Days
5 ⛅️
Cloudy
15 🌦
Rainy
Our opinion: Helsinki has OK weather in August.
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Average temperature in Helsinki in August
Here are the expected maximum, average and minimum temperatures in Helsinki for August based on the historical data.
Last Year
Historical Data
The temperature in August is +68°F on average, with a range between a maximum of +82°F during the day and a minimum of +54°F at night.
The average maximum temperature goes up 6% by the end of the month, compared with the beginning of the month, from +64°F to +66°F.
Is Helsinki warm or cold in August?
Helsinki is typically mild in August.
Maximum temperatures go down compared to the previous month from +68°F to +66°F. The minimum temperature also goes down from +57°F to +55°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
August is one of the warmest months in Helsinki, here is the comparison with other months:
Water temperature in Helsinki in August
Water in Helsinki in August is Cold. It varies from +37°F to +74°F, with an average of +55°F.The air temperature averaging +66°F is higher than the water temperature.
The water temperature in August is one of the warmest of the entire year:
The warmest water temperatures in Helsinki are reached in August, when the average sea temperature rises to +55°F. The coldest water temperatures are in February, with an average of +31°F.
Can you swim in Helsinki in August?
We would not recommend swimming in Helsinki in August, the water is very cold (+55°F on average). Consider swimming only if you are an experienced cold-water swimmer with proper gear.
🦭
Cold
Below +61°F
🏄♂️
Fresh
61°F - 70°F
🏊
Comfortable
70°F - 77°F
👙
Warm
77°F - 82°F
🔥
Very warm
+82°C and up
You will need a full-body wetsuit, cap, gloves, a warm change of clothes, and a hot drink ready for after your swim.
Climate in Helsinki in August
Helsinki weather looks like this, on average, in August and the surrounding months.
July
August
September
Avg. temperature
+68°F
+66°F
+57°F
Min. temperature
+45°F
+37°F
+32°F
Max. temperature
+90°F
+84°F
+72°F
Rainfall
69 mm
83 mm
78 mm
Wind
3 m/s
3 m/s
4 m/s
Avg. water temperature
+54°F
+55°F
+51°F
Humidity
72%
76%
81%
Air pressure
1010 HPa
1011 HPa
1011 HPa
Sunny days
10
8
5
Cloudy days
5
5
8
Rainy days
12
15
16
Snowy days
0
0
0
August typically has worse weather conditions compared to July.It’s getting colder in August. From +68°F in the day, the average maximum temperature lowers to +66°F.Prepare for more rain. Average rainfall goes from 69 mm to 83 mm.Humidity rises from 72% to 76%.The average wind speed doesn’t change much during August, staying around 3 m/s.The days becoming less sunny, going from 10 sunny days in July to 8 in August.
September brings much the same weather, it remains ok.
Wind speed in Helsinki in August based on historical data.
Last Year
Historical Data
The average wind speed is 5 m/s getting up to 11 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Helsinki is gradually increasing during August, going from 5 m/s to 7 m/s over the course of the month.
Rain
Amount of rainfall in mm during August in Helsinki based on historical data.
Last Year
Historical Data
A chance of rain on a typical day in August stands at 74%, leading to total precipitation of around 245 mm. The maximum amount of rainfall per day is around 40 mm, which is moderate rain.August is a pretty wet month with over 23 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
August is one of the rainiest months in Helsinki, here is a comparison with other months, total mm:
Helsinki wettest month is October, where a typical day has a 55% chance of precipitation and 83 mm of rainfall per day. February, on the other hand, is the driest month with a mere 3% chance of precipitation and 10 mm of rainfall per day.
How was the weather last August in Helsinki?
This is the weather in Helsinki in August 2023:
1 August
🌧️
+65°F
2 August
🌧️
+66°F
3 August
🌧️
+67°F
4 August
☁️
+67°F
5 August
☁️
+71°F
6 August
☀️
+72°F
7 August
☀️
+82°F
8 August
🌧️
+73°F
9 August
☀️
+69°F
10 August
☀️
+65°F
11 August
☀️
+68°F
12 August
☀️
+68°F
13 August
☀️
+72°F
14 August
☀️
+73°F
15 August
☀️
+75°F
16 August
☀️
+74°F
17 August
☁️
+72°F
18 August
☀️
+68°F
19 August
🌧️
+61°F
20 August
☁️
+67°F
21 August
☁️
+69°F
22 August
☁️
+69°F
23 August
☀️
+66°F
24 August
🌧️
+68°F
25 August
🌫️
+66°F
26 August
☀️
+68°F
27 August
🌧️
+64°F
28 August
🌧️
+64°F
29 August
☀️
+67°F
30 August
🌧️
+64°F
31 August
☁️
+66°F
In August 2023 Helsinki had 14 sunny days, 7 cloudy days, and 9 rainy days. The average maximum temperature was +68°F, with an absolute maximum of +82°F and a minimum of +61°F. The average humidity was 86%, with a maximum of 100% and a minimum of 54%. The average wind speed was 5 m/s, with a maximum of 19 m/s and a minimum of 0 m/s.
Are you planning a trip in August?
Climate Change Over the Years
This is how Helsinki climate has changed over the last 43 years.
The climate in Helsinki in August has not changed that much over the last 43 years.
The average temperature was the lowest in 1987 (+41°F) and the highest in 2020 (+52°F). The driest year was 2002 with only 248 mm of rainfall, and the wettest year was 2020 with 1153 mm.
FAQ
Frequently asked questions about the weather in Helsinki in August:
Is August a good time to visit Helsinki?
It’s always a good time to visit Helsinki, but the weather is changeable in August, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in Helsinki in August?
August has mild temperatures in Helsinki. Not ideal for sunbathing, but still good for daytime outdoor activities, but plan for cool evenings. Pack a light jacket and shorts!
Can you swim in Helsinki in August?
Swimming in Helsinki in August is challenging and not recommended for inexperienced swimmers or without proper equipment and preparation.
Is Helsinki rainy in August?
Helsinki is often rainy in August. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Helsinki in August?
Usually, it’s not very sunny in Helsinki in August, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
Other cities in Finland
Check out the weather for other cities in Finland.
For this page, we’ve looked at the typical weather in Helsinki, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
