Average weather for Finland in September
It's cool to moderate in September in Finland with an average temperature of 16°C. Temperatures this month range from a low of 13°C to a high of 18°C. At night, you can expect temperatures between 8°C and 13°C.
Start of September
The month of September starts in Finland with mild temps, averaging around 18°C during the day and nights around 11°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
Mid September
By mid-September, daytime temps drop to around 16°C, with nights around 10°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in Finland is around 14°C, while nighttime temps are about 9°C. A shower might pop up, but overall, the weather will be dry and sunny.
In September, there is an average of 51 mm of precipitation, spread over 9 days. The wind speed is around 4 Bft, mostly coming from the South.
Finland in September |
New York | ||
|---|---|---|---|
 Average temperature |
16°C | 27°C | |
 Max. temperature |
18°C | 31°C | |
| Min. temperature |
13°C | -5°C | |
 Total precipitation |
51 mm | 57 mm | |
| Rainy days |
9 days | 9 days | |
August
UV index
The UV index is a maximum of 4 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is September a good time to visit Finland?
Looking for sun and warm weather? September isn’t a good month to be in Finland. The temperatures are too low for a warm stay this month.
Temperature records
With 23°C in 2018, Finland reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 5°C in 2014. The extreme nighttime temperatures ranged from a lowest recorded value of -2°C to a highest value of 18°C.
Check out the climate of Finland for all months and discover the best travel time
The climate in Finland is based on weather data from Helsinki. Other places, like Rovaniemi, Kuusamo or Tampere, might have different weather. You can check out all destinations in Finland to get the full picture of the climate.
Daily Temperature in September in Finland
This chart shows the average daily high and low temperatures in September for Finland, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Weather experiences in September in Finland
Good
Cool days with clear blue skies interspersed with drizzle. H... more
Daily Precipitation in September in Finland
The chart below shows the average daily precipitation in September for Finland, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed 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 it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 9 days of precipitation in Finland.
Daily UV index in September in Finland
This chart shows the average daily UV index in September in Finland, 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 September in Finland over the years
This chart shows the average temperature in September in Finland, measured in degrees Celsius, over the past few years.
Total precipitation in September in Finland over the years
This chart shows the average precipitation in September in Finland, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Finland
Click on any day in September to get detailed info about the usual weather on that day in Finland. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Finland
The weather in September in Finland is rated 4 out of 5 stars by 1 visitor. Have you been to Finland? Share your weather experience to help other visitors.
Write your own review
Cool days with clear blue skies interspersed with drizzle. However, it was the perfect atmosphere for the stunning autumn colors. Definitely an unforgettable experience.— This text is automatically translated to English
Have you been to Finland in September?
Share your weather experience in September in Finland.
Average weather in Finland by month
Click on a month below to see detailed weather info for Finland. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
