Normal weather for Vaasa 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.
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.
Vaasa in September |
New York | ||
|---|---|---|---|
 Average Temperature |
15°C | 27°C | |
 High Temp |
18°C | 31°C | |
| Low Temp |
12°C | 21°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. You can expect regular precipitation, but there will also be some sunny days in the early part of the month.
With the temperature difference between day and night, it’s smart to wear layers. During the day, choose a light jacket, sweater or hoodie, and long pants. In the evening and morning, go for a warm jacket, sweater or hoodie, and long pants.
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.
Since it cools down at night, it’s a good idea to wear layers. During the day, choose a light jacket, sweater or hoodie, and long pants. In the evening and morning, go for a warm jacket, sweater or hoodie, and long pants.
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.
Because temperatures drop in the evening, wearing layers is recommended. During the day, choose a light jacket, sweater or hoodie, and long pants. In the evening and morning, go for a warm jacket, sweater or hoodie, and long pants.
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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.
Is September a good time to visit Vaasa?
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.
Temperature records for Vaasa in September
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.
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Daily Temperature in September in Vaasa
This chart shows the average daily high and low temperatures in September for Vaasa, 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.
Daily Precipitation in September in Vaasa
The chart below shows the average daily precipitation in September for Vaasa, 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 14 days of precipitation 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 few years.
Total Precipitation in September in Vaasa Over the Years
This chart shows the average precipitation in September in Vaasa, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily Climate 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.
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.
