Temperatures in September
It's cool in September in Nissi with an average temperature of 11°C. Temperatures this month range from a low of 8°C to a high of 14°C. At night, you can expect temperatures between 3°C and 8°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Nissi 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 Nissi with cool temperatures, averaging around 14°C during the day and nights close to 7°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Mid-September
By mid-September, the average daytime temperature drops to around 11°C, with nights close to 6°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of September
By the end of September, the average daytime temperature in Nissi will be around 9°C, with nights close to 5°C. A shower might show up, but overall the weather will be dry and sunny. Wear a thick coat, jumper, and long trousers.
Precipitation in September
In September, there is an average of 49 mm of precipitation, spread over 9 days. Of the total precipitation, about 0,3 cm falls as snow in September. The wind speed is around 4 Bft, mostly coming from the South.
The average precipitation chance is 30% 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 Nissi. 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.
Nissi in September |
London | ||
|---|---|---|---|
 Average Temperature |
11°C | 20°C | |
 High Temp |
14°C | 22°C | |
| Low Temp |
8°C | 17°C | |
 Total Precipitation |
49 mm | 44 mm | |
| Rainy Days |
9 days | 8 days | |
 Total Snowfall |
0,3 cm | 0 cm | |
| Snowy Days |
1 day | 0 days | |
August
UV index
The UV index is a maximum of 3 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Temperature records for Nissi in September
With 21°C, Nissi hit the highest temperature in the last 10 years in September 2019. The lowest daytime temperature in this month was 1°C in 2018. The extreme night temperatures ranged from a low of -4°C to a high of 15°C.
Check out the climate of Nissi 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.
Plan your next holiday
Don’t miss the best holiday deals for Nissi and see what our partners have for you.
Daily Temperature in September in Nissi
This chart shows the average daily temperatures, both day and night, for each day in September in Nissi, 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 Nissi
The chart below shows the average daily precipitation in September for Nissi, 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 9 days of rain in Nissi.
Daily Snowfall in September in Nissi
This chart shows the average daily snowfall in September in Nissi, measured in centimetres. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in September.
Daily UV Index in September in Nissi
This chart shows the average daily UV index in September in Nissi, 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 Nissi Over the Years
This chart shows the average temperature in September in Nissi, measured in degrees Celsius, over the past years.
Total Precipitation in September in Nissi Over the Years
This chart shows the average precipitation in September in Nissi, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Snowfall in September in Nissi per year
This chart shows the average snowfall in September in Nissi, measured in centimetres, over the past years.
Daily climate in September for Nissi
Click on a specific day in September for detailed info on the typical weather on that day in Nissi. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Nissi
Have you been to Nissi in September?
Share your weather experience in September in Nissi.
Average Weather in Nissi by Month
Click on a month below to see detailed weather info for Nissi. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
