Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
September brings a minor decrease, with the average high-temperature reducing from an agreeable 20.1°C (68.2°F) in August to a mild 14.3°C (57.7°F). Mänttä, during the month of September, experiences an average low-temperature of 7.4°C (45.3°F).Humidity
The average relative humidity in September is 83%.Rainfall
In Mänttä, in September, it is raining for 12.6 days, with typically 28mm (1.1") of accumulated precipitation. In Mänttä, during the entire year, the rain falls for 119.7 days and collects up to 379mm (14.92") of precipitation.Snowfall
January through June, September through December are months with snowfall in Mänttä, Finland. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 1mm (0.04") of snow. Throughout the year, in Mänttä, there are 102.7 snowfall days, and 976mm (38.43") of snow is accumulated.Daylight
The average length of the day in September is 12h and 56min.On the first day of the month, sunrise is at 06:12 and sunset at 20:30. On the last day of September, sunrise is at 07:27 and sunset at 18:55 EEST.
Sunshine
In September, the average sunshine is 6.5h.UV index
The average daily maximum UV index in September in Mänttä, Finland, is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 3 in September leads to these recommendations:
Take precautions - Protection against sun damage is advised. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Mänttä in September?
What is the average humidity in September in Mänttä?
How much does it rain in Mänttä in September?
When does it start snowing in Mänttä?
How many hours of daylight does Mänttä have in September?
When is the sunrise / sunset in September in Mänttä?
How long on average sun shines in September in Mänttä?
How high is the UV index in September in Mänttä?
Average temperature in September
Mänttä, Finland
- Average high temperature in September: 14.3°C
The warmest month (with the highest average high temperature) is July (21.5°C).
The month with the lowest average high temperature is January (-4.9°C).
- Average low temperature in September: 7.4°C
The month with the highest average low temperature is July (12.1°C).
The coldest month (with the lowest average low temperature) is January (-9.2°C).
Average pressure in September
Mänttä, Finland
- Average pressure in September: 1012.9mbar
The month with the highest atmospheric pressure is May (1014.6mbar).
The month with the lowest atmospheric pressure is December (1007.7mbar).
Average wind speed in September
Mänttä, Finland
- Average wind speed in September: 10.7km/h
The windiest month (with the highest average wind speed) is December (12.3km/h).
The calmest month (with the lowest average wind speed) is July (9.6km/h).
Average humidity in September
Mänttä, Finland
- Average humidity in September: 83%
The months with the highest relative humidity are January and February (95%).
The month with the lowest relative humidity is May (66%).
Average rainfall in September
Mänttä, Finland
- Average rainfall in September: 28mm
The wettest month (with the highest rainfall) is October (41mm).
The driest months (with the least rainfall) are March and April (25mm).
Average rainfall days in September
Mänttä, Finland
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is July (15 days).
The month with the least rainy days is February (2.9 days).
Average snowfall in September
Mänttä, Finland
- Average snowfall in September: 1mm
The month with the highest snowfall is December (221mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Mänttä, Finland
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is January (21.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Mänttä, Finland
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 19h and 36min).
The month with the shortest days is December (Average daylight: 5h and 18min).
- Average sunshine in September: 6h and 3min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 1h and 0min).
Average sunshine days in September
Mänttä, Finland
- Average sunshine days in September: 14 days
The month with the most sunshine days is June (17.4 days).
The month with the least sunshine days is December (8.4 days).
Average UV index in September
Mänttä, Finland
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in September
Mänttä, Finland
- Average cloud cover in September: 57
The month with the most cloud cover is January (Cloud cover 81).
The months with the least cloud cover are July and August (Cloud cover 44).
Average visibility in September
Mänttä, Finland
- Average visibility in September: 8km
The months with the highest visibility are May, June, July and August (9km).
The months with the lowest visibility are January and February (5km).
