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 arrival comes with a mild decrease in the average high-temperature, moving subtly from a pleasant 21.6°C (70.9°F) in August to a comfortable 16.9°C (62.4°F). An average nighttime temperature of 7°C (44.6°F) is recorded during September.Humidity
The average relative humidity in September is 81%.Rainfall
In Wattwil, in September, during 11.6 rainfall days, 41mm (1.61") of precipitation is typically accumulated. In Wattwil, during the entire year, the rain falls for 129.6 days and collects up to 714mm (28.11") of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 34min.On the first day of September in Wattwil, sunrise is at 06:43 and sunset at 20:03. 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 8.9h.UV index
The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A daily high UV index of 3 in September leads to these guidelines:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The Sun's radiation is especially intense around midday; try to stay in shade during this period. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
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 in Wattwil?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Wattwil have in September?
When is the sunrise / sunset in September in Wattwil?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Wattwil, Switzerland
- Average high temperature in September: 16.9°C
The warmest month (with the highest average high temperature) is August (21.6°C).
The month with the lowest average high temperature is January (1.4°C).
- Average low temperature in September: 7°C
The month with the highest average low temperature is August (10.5°C).
The coldest month (with the lowest average low temperature) is February (-5.8°C).
Average pressure in September
Wattwil, Switzerland
- Average pressure in September: 1018.6mbar
The month with the highest atmospheric pressure is December (1020.8mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).
Average wind speed in September
Wattwil, Switzerland
- Average wind speed in September: 6.2km/h
The windiest month (with the highest average wind speed) is December (8km/h).
The calmest month (with the lowest average wind speed) is August (6.1km/h).
Average humidity in September
Wattwil, Switzerland
- Average humidity in September: 81%
The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are July and August (78%).
Average rainfall in September
Wattwil, Switzerland
- Average rainfall in September: 41mm
The wettest month (with the highest rainfall) is May (91mm).
The driest month (with the least rainfall) is November (36mm).
Average rainfall days in September
Wattwil, Switzerland
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (6 days).
Average snowfall in September
Wattwil, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (417mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Wattwil, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Wattwil, 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in September
Wattwil, Switzerland
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is October (19.3 days).
The months with the least sunshine days are May and June (13.8 days).
Average UV index in September
Wattwil, Switzerland
- 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 November and December (UV index 1).
Average cloud cover in September
Wattwil, Switzerland
- Average cloud cover in September: 37
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Wattwil, Switzerland
- Average visibility in September: 8km
The month with the highest visibility is July (9km).
The months with the lowest visibility are January and February (7km).
