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
The start of September involves a temperature drop, moving from an enjoyable 16.7°C (62.1°F) in August to a cool 10.9°C (51.6°F). In the month of September, the average temperature dips to a wintry 4.8°C (40.6°F) during the night.Humidity
The average relative humidity in September is 86%.Rainfall
In Piispajärvi, during September, the rain falls for 15.8 days and regularly aggregates up to 42mm (1.65") of precipitation. Throughout the year, there are 117.7 rainfall days, and 499mm (19.65") of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows in Piispajärvi. Throughout September, in the average 1.2 snowfall days, it receives 6mm (0.24") of snow. Throughout the year, there are 152.2 snowfall days, and 1684mm (66.3") of snow is accumulated.Daylight
The average length of the day in September is 13h and 5min.On the first day of September, sunrise is at 05:44 and sunset at 20:23. On the last day of the month, sunrise is at 07:12 and sunset at 18:35 EEST.
Sunshine
The average sunshine in September is 5.4h.UV index
In Piispajärvi, the average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: A daily high UV index of 2 in September leads to these guidelines:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Around midday, solar radiation is most harmful; hence, exposure should be limited. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How much does it rain in September?
When does it start snowing?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Piispajärvi, Finland
- Average high temperature in September: 10.9°C
The warmest month (with the highest average high temperature) is July (19.3°C).
The month with the lowest average high temperature is January (-8.3°C).
- Average low temperature in September: 4.8°C
The month with the highest average low temperature is July (10.3°C).
The coldest month (with the lowest average low temperature) is January (-13.6°C).
Average pressure in September
Piispajärvi, Finland
- Average pressure in September: 1011.4mbar
The month with the highest atmospheric pressure is May (1014.4mbar).
The month with the lowest atmospheric pressure is December (1006.2mbar).
Average wind speed in September
Piispajärvi, Finland
- Average wind speed in September: 11.8km/h
The windiest month (with the highest average wind speed) is November (12.9km/h).
The calmest month (with the lowest average wind speed) is July (10.4km/h).
Average humidity in September
Piispajärvi, Finland
- Average humidity in September: 86%
The month with the highest relative humidity is January (97%).
The month with the lowest relative humidity is June (69%).
Average rainfall in September
Piispajärvi, Finland
- Average rainfall in September: 42mm
The wettest month (with the highest rainfall) is July (60mm).
The driest month (with the least rainfall) is April (30mm).
Average rainfall days in September
Piispajärvi, Finland
- Average rainfall days in September: 15.8 days
The month with the highest number of rainy days is July (19.2 days).
The month with the least rainy days is February (1.3 days).
Average snowfall in September
Piispajärvi, Finland
- Average snowfall in September: 6mm
The month with the highest snowfall is December (297mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Piispajärvi, Finland
- Average snowfall days in September: 1.2 days
The month with the highest number of snowfall days is December (24.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Piispajärvi, Finland
- Average daylight in September: 13h and 1min
The month with the longest days is June (Average daylight: 22h and 0min).
The month with the shortest days is December (Average daylight: 3h and 42min).
- Average sunshine in September: 5h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 0h and 36min).
Average sunshine days in September
Piispajärvi, Finland
- Average sunshine days in September: 10.5 days
The month with the most sunshine days is October (11.9 days).
The month with the least sunshine days is December (6 days).
Average UV index in September
Piispajärvi, Finland
- Average UV index in September: 2
The months with the highest UV index are June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).
Average cloud cover in September
Piispajärvi, Finland
- Average cloud cover in September: 67
The months with the most cloud cover are January, February and December (Cloud cover 84).
The month with the least cloud cover is July (Cloud cover 50).
Average visibility in September
Piispajärvi, Finland
- Average visibility in September: 8km
The months with the highest visibility are June and July (9km).
The months with the lowest visibility are January, February, March, April and December (5km).
