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
As September arrives, Ristiina's weather displays a decrease in high-temperatures, transitioning from August's agreeable 20.4°C (68.7°F) to a mild 14.3°C (57.7°F). An average low-temperature of 8°C (46.4°F) is recorded during the nights in September in Ristiina.Humidity
In September, the average relative humidity is 82%.Rainfall
In Ristiina, Finland, during September, the rain falls for 14.2 days and regularly aggregates up to 35mm (1.38") of precipitation. Throughout the year, there are 125 rainfall days, and 408mm (16.06") of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall in Ristiina, Finland. September is the first month it typically snows in Ristiina. Throughout September, in the average 0.2 snowfall days, it receives 1mm (0.04") of snow. Throughout the year, in Ristiina, there are 114.6 snowfall days, and 1087mm (42.8") of snow is accumulated.Daylight
In September, the average length of the day is 12h and 55min.On the first day of September in Ristiina, sunrise is at 06:03 and sunset at 20:18. On the last day of the month, sunrise is at 07:16 and sunset at 18:45 EEST.
Sunshine
The average sunshine in September in Ristiina, Finland, is 6.7h.UV index
The average daily maximum UV index in September in Ristiina is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: In September, the UV index of 3 transforms into the following advice:
Take precautions - Protection against sun damage is advised. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Ristiina?
What is the average humidity in September in Ristiina?
How much does it rain in Ristiina in September?
When does it start snowing in Ristiina?
What is the average length of the day in September in Ristiina?
When are sunrise and sunset in September in Ristiina?
How many hours of sunshine does Ristiina have in September?
How high is the UV index in September in Ristiina?
Average temperature in September
Ristiina, Finland
- Average high temperature in September: 14.3°C
The warmest month (with the highest average high temperature) is July (21.9°C).
The month with the lowest average high temperature is January (-5.3°C).
- Average low temperature in September: 8°C
The month with the highest average low temperature is July (12.6°C).
The coldest month (with the lowest average low temperature) is January (-9.2°C).
Average pressure in September
Ristiina, Finland
- Average pressure in September: 1013.1mbar
The month with the highest atmospheric pressure is May (1014.7mbar).
The month with the lowest atmospheric pressure is December (1008.5mbar).
Average wind speed in September
Ristiina, Finland
- Average wind speed in September: 11.1km/h
The windiest month (with the highest average wind speed) is December (12.9km/h).
The calmest months (with the lowest average wind speed) are July and August (10.1km/h).
Average humidity in September
Ristiina, Finland
- Average humidity in September: 82%
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
Ristiina, Finland
- Average rainfall in September: 35mm
The wettest month (with the highest rainfall) is July (44mm).
The driest month (with the least rainfall) is April (25mm).
Average rainfall days in September
Ristiina, Finland
- Average rainfall days in September: 14.2 days
The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is February (2.7 days).
Average snowfall in September
Ristiina, Finland
- Average snowfall in September: 1mm
The month with the highest snowfall is December (236mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Ristiina, Finland
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is January (24.4 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Ristiina, Finland
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 19h and 18min).
The month with the shortest days is December (Average daylight: 5h and 30min).
- Average sunshine in September: 6h and 4min
The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 0h and 48min).
Average sunshine days in September
Ristiina, Finland
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is May (16 days).
The month with the least sunshine days is December (6.5 days).
Average UV index in September
Ristiina, Finland
- Average UV index in September: 3
The months with the highest UV index are June and 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
Ristiina, Finland
- Average cloud cover in September: 56
The months with the most cloud cover are January and February (Cloud cover 82).
The month with the least cloud cover is July (Cloud cover 42).
Average visibility in September
Ristiina, 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).
