Temperatures in September
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.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Vaasa in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Vaasa with cool temperatures, averaging around 17°C during the day and nights close to 10°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month.
Mid-September
By mid-September, the average daytime temperature drops to around 15°C, with nights close to 9°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
End of September
By the end of September, the average daytime temperature in Vaasa will be around 14°C, with nights close to 8°C. A shower might show up, but overall the weather will be dry and sunny.
Precipitation in September
In September, there is an average of 117 mm of precipitation, spread over 8 days. The wind speed is around 4 Bft, mostly coming from the South.
The average precipitation chance is 28% 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 September for Vaasa. 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.
Vaasa in September |
London | ||
|---|---|---|---|
 Average Temperature |
15°C | 20°C | |
 High Temp |
18°C | 22°C | |
| Low Temp |
12°C | 17°C | |
 Total Precipitation |
117 mm | 44 mm | |
| Rainy Days |
8 days | 8 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 Vaasa?
Looking for sun and warm weather? Then September isn’t the best time to be in Vaasa. The temperature is too low this month for a warm stay.
Temperature records for Vaasa in September
With 26°C, Vaasa hit the highest temperature in the last 10 years in September 2019. The lowest daytime temperature in this month was 6°C in 2014. The extreme night temperatures ranged from a low of -2°C to a high of 16°C.
Check out the climate of Vaasa 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 Helsinki, Rovaniemi, Kuusamo, or have a look at other destinations in Finland.
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Daily Temperature in September in Vaasa
This chart shows the average daily temperatures, both day and night, for each day in September in Vaasa, 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 September in Vaasa
The chart below shows the average daily precipitation in September for Vaasa, 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 September, you can expect around 8 days of rain in Vaasa.
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.
Temperature in September in Vaasa Over the Years
This chart shows the average temperature in September in Vaasa, measured in degrees Celsius, over the past years.
Total Precipitation in September in Vaasa Over the Years
This chart shows the average precipitation in September in Vaasa, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Vaasa
Click on a specific day in September for detailed info on the typical weather on that day in Vaasa. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Vaasa
Have you been to Vaasa in September?
Share your weather experience in September in Vaasa.
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.
