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
The start of September signals a gentle decrease in the average high-temperature, transitioning from a warm 23°C (73.4°F) in August to an enjoyable 18.6°C (65.5°F). Rorschach, during the month of September, experiences an average low-temperature of 8.6°C (47.5°F).Humidity
The average relative humidity in September is 78%.Rainfall
In Rorschach, during September, the rain falls for 14.3 days and regularly aggregates up to 57mm (2.24") of precipitation. In Rorschach, during the entire year, the rain falls for 177.8 days and collects up to 1006mm (39.61") of precipitation.Snowfall
In Rorschach, snow does not fall in June through September.Daylight
The average length of the day in September in Rorschach is 12h and 34min.On the first day of September in Rorschach, 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
The average sunshine in September in Rorschach is 9.2h.UV index
The average daily maximum UV index in September in Rorschach, Switzerland, 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: The average daily UV index of 4 in September transforms into the following instructions:
Be vigilant - Preventing sunburn is recommended. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Frequently asked questions
What is the usual temperature for Rorschach in September?
What is the average humidity in September in Rorschach?
How many days does it rain in September in Rorschach?
When it does not snow in Rorschach?
Does it snow in Rorschach in September?
What is the average length of the day in September in Rorschach?
When is the sunrise / sunset in September in Rorschach?
How long on average sun shines in September in Rorschach?
What is the UV index intensity in September in Rorschach?
Average temperature in September
Rorschach, Switzerland
- Average high temperature in September: 18.6°C
The warmest month (with the highest average high temperature) is July (23.1°C).
The month with the lowest average high temperature is January (2.9°C).
- Average low temperature in September: 8.6°C
The months with the highest average low temperature are July and August (12.6°C).
The coldest month (with the lowest average low temperature) is January (-2.9°C).
Average pressure in September
Rorschach, 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 (1015.7mbar).
Average wind speed in September
Rorschach, Switzerland
- Average wind speed in September: 6.9km/h
The windiest month (with the highest average wind speed) is March (9km/h).
The calmest month (with the lowest average wind speed) is August (6.7km/h).
Average humidity in September
Rorschach, Switzerland
- Average humidity in September: 78%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is July (75%).
Average rainfall in September
Rorschach, Switzerland
- Average rainfall in September: 57mm
The wettest month (with the highest rainfall) is August (126mm).
The driest month (with the least rainfall) is April (52mm).
Average rainfall days in September
Rorschach, Switzerland
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is July (20.8 days).
The month with the least rainy days is February (9.5 days).
Average snowfall in September
Rorschach, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (353mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Rorschach, Switzerland
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (12.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Rorschach, 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: 9h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).
Average sunshine days in September
Rorschach, Switzerland
- Average sunshine days in September: 12.5 days
The month with the most sunshine days is October (17.2 days).
The month with the least sunshine days is July (6.6 days).
Average UV index in September
Rorschach, 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, November and December (UV index 2).
Average cloud cover in September
Rorschach, Switzerland
- Average cloud cover in September: 34
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Rorschach, Switzerland
- Average visibility in September: 8km
The months with the highest visibility are April, May, June, July, August, October and November (9km).
The months with the lowest visibility are January, February, March, September and December (8km).
Rorschach, Switzerland
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