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
Weather in September
Temperature
Transitioning from August to September involves a subtle drop in average high-temperatures, descending from a moderate 15.3°C (59.5°F) to a cool 10.9°C (51.6°F). Surlej's temperature in September lowers to a consistent average of 1.6°C (34.9°F) during the nights.Humidity
In Surlej, the average relative humidity in September is 85%.Rainfall
In Surlej, Switzerland, in September, during 15.6 rainfall days, 39mm (1.54") of precipitation is typically accumulated. Throughout the year, in Surlej, there are 139.9 rainfall days, and 641mm (25.24") of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall in Surlej. September is the first month it typically snows. Throughout September, in the average 1.2 snowfall days, it receives 33mm (1.3") of snow. In Surlej, during the entire year, snow falls for 97.2 days and aggregates up to 1956mm (77.01") of snow.Daylight
The average length of the day in September is 12h and 33min.On the first day of September, sunrise is at 06:41 and sunset at 19:59. On the last day of the month, sunrise is at 07:18 and sunset at 19:02 CEST.
Sunshine
In Surlej, the average sunshine in September is 7.8h.UV index
The average daily maximum UV index in September in Surlej is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index, 2 during September, leads to the following recommendations:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Always opt for UVA and UVB-resistant sunglasses on radiant days. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Frequently asked questions
What is the usual temperature for Surlej in September?
What is the average humidity in September in Surlej?
How many days does it rain in September in Surlej?
When does it start snowing in Surlej?
What is the average length of the day in September in Surlej?
When is the sunrise / sunset in September in Surlej?
How long on average sun shines in September in Surlej?
What is the UV index reading in September in Surlej?
Average temperature in September
Surlej, Switzerland
- Average high temperature in September: 10.9°C
The warmest month (with the highest average high temperature) is July (15.4°C).
The month with the lowest average high temperature is January (-4.4°C).
- Average low temperature in September: 1.6°C
The month with the highest average low temperature is August (5°C).
The coldest month (with the lowest average low temperature) is January (-13.9°C).
Average pressure in September
Surlej, Switzerland
- Average pressure in September: 1018mbar
The month with the highest atmospheric pressure is December (1020.6mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).
Average wind speed in September
Surlej, Switzerland
- Average wind speed in September: 7.8km/h
The windiest months (with the highest average wind speed) are February and December (9.9km/h).
The calmest month (with the lowest average wind speed) is August (7.5km/h).
Average humidity in September
Surlej, Switzerland
- Average humidity in September: 85%
The month with the highest relative humidity is April (94%).
The month with the lowest relative humidity is July (81%).
Average rainfall in September
Surlej, Switzerland
- Average rainfall in September: 39mm
The wettest month (with the highest rainfall) is November (84mm).
The driest month (with the least rainfall) is January (20mm).
Average rainfall days in September
Surlej, Switzerland
- Average rainfall days in September: 15.6 days
The month with the highest number of rainy days is July (22.6 days).
The month with the least rainy days is December (2.6 days).
Average snowfall in September
Surlej, Switzerland
- Average snowfall in September: 33mm
The month with the highest snowfall is November (492mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Surlej, Switzerland
- Average snowfall days in September: 1.2 days
The month with the highest number of snowfall days is March (17 days).
The month with the least snowfall days is August (0 days).
Average daylight in September /
Average sunshine in September
Surlej, Switzerland
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is November (Average sunshine: 3h and 54min).
Average sunshine days in September
Surlej, Switzerland
- Average sunshine days in September: 11 days
The month with the most sunshine days is December (18.8 days).
The month with the least sunshine days is July (6.2 days).
Average UV index in September
Surlej, Switzerland
- Average UV index in September: 2
The months with the highest UV index are June, July and August (UV index 3).
The months with the lowest UV index are January, February, March, April, October and November (UV index 1).
Average cloud cover in September
Surlej, Switzerland
- Average cloud cover in September: 54
The month with the most cloud cover is April (Cloud cover 66).
The month with the least cloud cover is July (Cloud cover 47).
Average visibility in September
Surlej, Switzerland
- Average visibility in September: 7km
The month with the highest visibility is July (8km).
The month with the lowest visibility is April (5km).
Surlej, Switzerland
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