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
Ristijärvi's transition into September involves a shift in temperature, receding from an enjoyable 18.2°C (64.8°F) in August to a cool 12.5°C (54.5°F). During September, the nighttime temperature averages to a frosty 6.3°C (43.3°F).Humidity
In September, the average relative humidity in Ristijärvi is 85%.Rainfall
In Ristijärvi, in September, during 15.2 rainfall days, 31mm (1.22") of precipitation is typically accumulated. Throughout the year, in Ristijärvi, Finland, there are 123.8 rainfall days, and 364mm (14.33") of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows in Ristijärvi. Throughout September, in the average 0.6 snowfall days, it receives 9mm (0.35") of snow. Throughout the year, in Ristijärvi, there are 126.2 snowfall days, and 903mm (35.55") of snow is accumulated.Daylight
In September, the average length of the day is 13h and 2min.On the first day of September in Ristijärvi, sunrise is at 05:49 and sunset at 20:24. On the last day of the month, sunrise is at 07:14 and sunset at 18:39 EEST.
Sunshine
In September, the average sunshine in Ristijärvi is 5.8h.UV index
In September, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index, 2 during September, leads to the following recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Ristijärvi?
What is the average humidity in September in Ristijärvi?
How much does it rain in Ristijärvi in September?
When does it start to snow in Ristijärvi?
What is the average length of the day in September in Ristijärvi?
When are sunrise and sunset in September in Ristijärvi?
How long on average sun shines in September in Ristijärvi?
How high is the UV index in September in Ristijärvi?
Average temperature in September
Ristijärvi, Finland
- Average high temperature in September: 12.5°C
The warmest month (with the highest average high temperature) is July (20.5°C).
The month with the lowest average high temperature is January (-7.3°C).
- Average low temperature in September: 6.3°C
The month with the highest average low temperature is July (11.6°C).
The coldest month (with the lowest average low temperature) is January (-11.6°C).
Average pressure in September
Ristijärvi, Finland
- Average pressure in September: 1012mbar
The month with the highest atmospheric pressure is May (1014.3mbar).
The month with the lowest atmospheric pressure is December (1006.7mbar).
Average wind speed in September
Ristijärvi, Finland
- Average wind speed in September: 11.7km/h
The windiest months (with the highest average wind speed) are November and December (13.1km/h).
The calmest month (with the lowest average wind speed) is July (10km/h).
Average humidity in September
Ristijärvi, Finland
- Average humidity in September: 85%
The months with the highest relative humidity are January and February (96%).
The month with the lowest relative humidity is June (69%).
Average rainfall in September
Ristijärvi, Finland
- Average rainfall in September: 31mm
The wettest month (with the highest rainfall) is July (48mm).
The driest months (with the least rainfall) are February and April (21mm).
Average rainfall days in September
Ristijärvi, Finland
- Average rainfall days in September: 15.2 days
The month with the highest number of rainy days is August (17.3 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in September
Ristijärvi, Finland
- Average snowfall in September: 9mm
The month with the highest snowfall is March (160mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Ristijärvi, Finland
- Average snowfall days in September: 0.6 days
The month with the highest number of snowfall days is December (23.4 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Ristijärvi, Finland
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 12min).
The month with the shortest days is December (Average daylight: 4h and 12min).
- Average sunshine in September: 5h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 0h and 42min).
Average sunshine days in September
Ristijärvi, Finland
- Average sunshine days in September: 10.8 days
The month with the most sunshine days is May (13 days).
The month with the least sunshine days is April (7.6 days).
Average UV index in September
Ristijärvi, Finland
- Average UV index in September: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 1).
Average cloud cover in September
Ristijärvi, Finland
- Average cloud cover in September: 63
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 46).
Average visibility in September
Ristijärvi, 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).
