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 decrease in the average high-temperature, falling from August's agreeable 20.3°C (68.5°F) to a refreshing 15.2°C (59.4°F). The nights of September anticipate an average low-temperature of 9.8°C (49.6°F).Humidity
In Heponiitty, the average relative humidity in September is 80%.Rainfall
In Heponiitty, in September, it is raining for 15.5 days, with typically 38mm (1.5") of accumulated precipitation. Throughout the year, in Heponiitty, Finland, there are 120.2 rainfall days, and 354mm (13.94") of precipitation is accumulated.Snowfall
June through September are months without snowfall in Heponiitty, Finland.Daylight
The average length of the day in September is 12h and 53min.On the first day of the month, sunrise is at 06:16 and sunset at 20:25. On the last day of September, in Heponiitty, sunrise is at 07:25 and sunset at 18:55 EEST.
Sunshine
In September, the average sunshine in Heponiitty is 7.4h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index, 3 during September, leads to the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Heponiitty?
What is the average humidity in September in Heponiitty?
How many days does it rain in September in Heponiitty?
When it does not snow in Heponiitty?
Does it snow in Heponiitty in September?
How many hours of daylight does Heponiitty have in September?
When are sunrise and sunset in September in Heponiitty?
How many hours of sunshine does Heponiitty have in September?
What is the UV index intensity in September in Heponiitty?
Average temperature in September
Heponiitty, Finland
- Average high temperature in September: 15.2°C
The warmest month (with the highest average high temperature) is July (21.3°C).
The month with the lowest average high temperature is January (-2.8°C).
- Average low temperature in September: 9.8°C
The month with the highest average low temperature is July (13.7°C).
The coldest month (with the lowest average low temperature) is January (-6.5°C).
Average pressure in September
Heponiitty, Finland
- Average pressure in September: 1013.4mbar
The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is December (1008.6mbar).
Average wind speed in September
Heponiitty, Finland
- Average wind speed in September: 13.9km/h
The windiest month (with the highest average wind speed) is December (16.9km/h).
The calmest month (with the lowest average wind speed) is July (11.8km/h).
Average humidity in September
Heponiitty, Finland
- Average humidity in September: 80%
The month with the highest relative humidity is February (92%).
The month with the lowest relative humidity is May (69%).
Average rainfall in September
Heponiitty, Finland
- Average rainfall in September: 38mm
The wettest month (with the highest rainfall) is October (48mm).
The driest month (with the least rainfall) is May (15mm).
Average rainfall days in September
Heponiitty, Finland
- Average rainfall days in September: 15.5 days
The months with the highest number of rainy days are July, August and September (15.5 days).
The month with the least rainy days is February (3 days).
Average snowfall in September
Heponiitty, Finland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (94mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Heponiitty, Finland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Heponiitty, Finland
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 48min).
The month with the shortest days is December (Average daylight: 5h and 54min).
- Average sunshine in September: 7h and 2min
The month with the most sunshine is June (Average sunshine: 12h and 24min).
The month with the least sunshine is December (Average sunshine: 1h and 42min).
Average sunshine days in September
Heponiitty, Finland
- Average sunshine days in September: 11.9 days
The month with the most sunshine days is May (21.9 days).
The month with the least sunshine days is November (11.1 days).
Average UV index in September
Heponiitty, 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
Heponiitty, Finland
- Average cloud cover in September: 48
The months with the most cloud cover are February and December (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in September
Heponiitty, Finland
- Average visibility in September: 10km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are February and March (7km).
