FinlandThe weather in September in Vaasa
It's cool to moderate in September in Vaasa with an average temperature of 15°C. Temperatures this month range from a low of 12°C to a high of 18°C. At night, you can expect temperatures between 6°C and 12°C.
Looking for sun and warm weather? September isn’t a good month to be in Vaasa. The temperatures are too low for a warm stay this month.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Vaasa, Finland. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 26°C in 2019, Vaasa reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 6°C in 2014. The extreme nighttime temperatures ranged from a lowest recorded value of -2°C to a highest value of 16°C.
Rainfall amount
In September, there is an average of 117 mm of precipitation, spread over 14 days. The wind speed is around 4 Bft, mostly coming from the South.
Daily weather in September for Vaasa
Click on any day in September to get detailed info about the usual weather on that day in Vaasa. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Vaasa | New York | |
|---|---|---|
| Average temperature | 15°C | 27°C |
| Max. temperature | 18°C | 31°C |
| Min. temperature | 6°C | -5°C |
| Total precipitation | 117 mm | 57 mm |
| Rainy days | 14 days | 9 days |
Start of September
The month of September starts in Vaasa with cool temps, averaging around 17°C during the day and nights around 10°C.
Mid September
By mid-September, daytime temps drop to around 15°C, with nights around 9°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of September
By the end of September, the average daytime temperature in Vaasa is around 14°C, while nighttime temps are about 8°C. A shower might pop up, but overall, the weather will be dry and sunny.
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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.
Check out the climate of Vaasa for all months and discover the best travel time
Curious about the weather in other parts of Finland? Check out the climate and weather for spots like Helsinki, Rovaniemi, Kuusamo, or explore other destinations in Finland.
Temperature charts
These charts show the average temperatures in September in Vaasa, Finland. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Vaasa
Temperature in September in Vaasa over the years
Precipitation charts
These charts show the average amount of precipitation in September in Vaasa, Finland. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Vaasa
Total precipitation in September in Vaasa over the years
Daily UV index in September in Vaasa
This chart shows the average daily UV index in September in Vaasa, 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.
Weather experiences in September in Vaasa
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Average weather in Vaasa by month
Click on a month below to see detailed weather info for Vaasa. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.