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's onset corresponds with a subtle shift in the average high-temperature, slightly moving from an agreeable 22.8°C (73°F) in August to a comfortable 18.4°C (65.1°F). In Grub, the average nighttime temperature during September is a chilly 8.3°C (46.9°F).Humidity
In September, the average relative humidity in Grub is 79%.Rainfall
In Grub, in September, during 14.1 rainfall days, 69mm (2.72") of precipitation is typically accumulated. In Grub, during the entire year, the rain falls for 161.3 days and collects up to 939mm (36.97") of precipitation.Snowfall
January through May, September through December are months with snowfall in Grub. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 1mm (0.04") of snow. Throughout the year, there are 48.4 snowfall days, and 1201mm (47.28") of snow is accumulated.Daylight
The average length of the day in September is 12h and 34min.On the first day of September, sunrise is at 06:41 and sunset at 20:02. On the last day of the month, sunrise is at 07:20 and sunset at 19:03 CEST.
Sunshine
In September, the average sunshine is 8.7h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Make use of precautions - It is urged to ward off sun damage. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How much does it rain in September?
When does it start snowing?
How many hours of daylight does Grub have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Grub have in September?
What is the UV index intensity in September?
Average temperature in September
Grub, Switzerland
- Average high temperature in September: 18.4°C
The warmest month (with the highest average high temperature) is July (22.9°C).
The month with the lowest average high temperature is January (2.5°C).
- Average low temperature in September: 8.3°C
The month with the highest average low temperature is August (12.3°C).
The coldest month (with the lowest average low temperature) is February (-3.8°C).
Average pressure in September
Grub, Switzerland
- Average pressure in September: 1018.5mbar
The month with the highest atmospheric pressure is December (1020.7mbar).
The month with the lowest atmospheric pressure is April (1015.7mbar).
Average wind speed in September
Grub, Switzerland
- Average wind speed in September: 6.8km/h
The windiest month (with the highest average wind speed) is March (8.9km/h).
The calmest months (with the lowest average wind speed) are August and September (6.8km/h).
Average humidity in September
Grub, Switzerland
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are April and July (75%).
Average rainfall in September
Grub, Switzerland
- Average rainfall in September: 69mm
The wettest month (with the highest rainfall) is August (113mm).
The driest month (with the least rainfall) is April (43mm).
Average rainfall days in September
Grub, Switzerland
- Average rainfall days in September: 14.1 days
The month with the highest number of rainy days is May (20 days).
The month with the least rainy days is February (7.8 days).
Average snowfall in September
Grub, Switzerland
- Average snowfall in September: 1mm
The month with the highest snowfall is January (337mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Grub, Switzerland
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Grub, Switzerland
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in September
Grub, Switzerland
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is October (17.8 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in September
Grub, Switzerland
- Average UV index in September: 4
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 2).
Average cloud cover in September
Grub, Switzerland
- Average cloud cover in September: 38
The months with the most cloud cover are January and February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Grub, Switzerland
- Average visibility in September: 8km
The months with the highest visibility are April, May, June, July and August (9km).
The months with the lowest visibility are January, February, March, September, October, November and December (8km).
