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
In Certara, the average high-temperature in September slightly decreases from a warm 24.6°C (76.3°F) in August to a pleasant 20.2°C (68.4°F). In September, the nighttime temperature in Certara lowers to an average of 9.3°C (48.7°F).Humidity
In Certara, Switzerland, the average relative humidity in September is 76%.Rainfall
In Certara, in September, during 8.3 rainfall days, 16mm (0.63") of precipitation is typically accumulated. In Certara, Switzerland, during the entire year, the rain falls for 102.6 days and collects up to 414mm (16.3") of precipitation.Snowfall
In Certara, snow does not fall in April through October.Daylight
In Certara, the average length of the day in September is 12h and 32min.On the first day of September in Certara, sunrise is at 06:45 and sunset at 20:02. On the last day of the month, sunrise is at 07:21 and sunset at 19:05 CEST.
Sunshine
The average sunshine in September is 9.2h.UV index
In Certara, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A typical high UV index of 4 in September suggests the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. To guard against the harmful effects of the Sun, minimize exposure during midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Certara?
What is the average humidity in September in Certara?
How many days does it rain in September in Certara?
When it does not snow in Certara?
What is the average length of the day in September in Certara?
What time are sunrise and sunset in September in Certara?
How long on average sun shines in September in Certara?
What is the UV index intensity in September in Certara?
Average temperature in September
Certara, Switzerland
- Average high temperature in September: 20.2°C
The warmest month (with the highest average high temperature) is July (25.2°C).
The month with the lowest average high temperature is January (4.5°C).
- Average low temperature in September: 9.3°C
The months with the highest average low temperature are July and August (12.8°C).
The coldest month (with the lowest average low temperature) is January (-2.3°C).
Average pressure in September
Certara, Switzerland
- Average pressure in September: 1017.7mbar
The month with the highest atmospheric pressure is December (1020.5mbar).
The month with the lowest atmospheric pressure is April (1015mbar).
Average wind speed in September
Certara, Switzerland
- Average wind speed in September: 7km/h
The windiest month (with the highest average wind speed) is July (7.7km/h).
The calmest month (with the lowest average wind speed) is November (6.1km/h).
Average humidity in September
Certara, Switzerland
- Average humidity in September: 76%
The month with the highest relative humidity is November (80%).
The months with the lowest relative humidity are January and July (72%).
Average rainfall in September
Certara, Switzerland
- Average rainfall in September: 16mm
The wettest month (with the highest rainfall) is November (70mm).
The driest month (with the least rainfall) is January (7mm).
Average rainfall days in September
Certara, Switzerland
- Average rainfall days in September: 8.3 days
The month with the highest number of rainy days is May (11.8 days).
The month with the least rainy days is December (4.1 days).
Average snowfall in September
Certara, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is February (9mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Certara, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Certara, Switzerland
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is November (Average sunshine: 5h and 18min).
Average sunshine days in September
Certara, Switzerland
- Average sunshine days in September: 19.6 days
The month with the most sunshine days is December (25.8 days).
The month with the least sunshine days is June (16.9 days).
Average UV index in September
Certara, Switzerland
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Certara, Switzerland
- Average cloud cover in September: 31
The month with the most cloud cover is November (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 23).
Average visibility in September
Certara, Switzerland
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, November and December (9km).
The month with the lowest visibility is October (8km).
