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
The transition into September is accompanied by a slight temperature decrease, with the average high-temperature shifting from a moderately hot 24.4°C (75.9°F) in August to a comfortable 19.9°C (67.8°F). During the month of September, the temperature generally drops to a low average of 8.4°C (47.1°F).Humidity
The average relative humidity in September is 80%.Rainfall
The months with the least rainfall are April and September Rain falls for 12.5 days and accumulates 38mm (1.5") of rain.Snowfall
In Koblenz, snow does not fall in June through September.Daylight
The average length of the day in September in Koblenz is 12h and 34min.On the first day of the month, sunrise is at 06:46 and sunset at 20:07. On the last day of September, in Koblenz, sunrise is at 07:25 and sunset at 19:08 CEST.
Sunshine
In September, the average sunshine is 8.9h.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 unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. 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 is the average September temperature in Koblenz?
What is the average humidity in September in Koblenz?
What is the driest month in Koblenz?
How many days does it rain in September in Koblenz?
When it does not snow in Koblenz?
Does it snow in Koblenz in September?
How many hours of daylight does Koblenz have in September?
When are sunrise and sunset in September in Koblenz?
How many hours of sunshine does Koblenz have in September?
What is the UV index reading in September in Koblenz?
Average temperature in September
Koblenz, Switzerland
- Average high temperature in September: 19.9°C
The warmest months (with the highest average high temperature) are July and August (24.4°C).
The month with the lowest average high temperature is January (3.3°C).
- Average low temperature in September: 8.4°C
The month with the highest average low temperature is August (12.3°C).
The coldest month (with the lowest average low temperature) is January (-3.1°C).
Average pressure in September
Koblenz, Switzerland
- Average pressure in September: 1018.7mbar
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
Koblenz, Switzerland
- Average wind speed in September: 6.3km/h
The windiest month (with the highest average wind speed) is March (8.7km/h).
The calmest month (with the lowest average wind speed) is August (6km/h).
Average humidity in September
Koblenz, Switzerland
- Average humidity in September: 80%
The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are April and July (76%).
Average rainfall in September
Koblenz, Switzerland
- Average rainfall in September: 38mm
The wettest month (with the highest rainfall) is August (82mm).
The driest months (with the least rainfall) are April and September (38mm).
Average rainfall days in September
Koblenz, Switzerland
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (7.8 days).
Average snowfall in September
Koblenz, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (232mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Koblenz, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Koblenz, 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 August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in September
Koblenz, Switzerland
- Average sunshine days in September: 15 days
The month with the most sunshine days is October (16.5 days).
The month with the least sunshine days is June (11 days).
Average UV index in September
Koblenz, 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
Koblenz, Switzerland
- Average cloud cover in September: 36
The months with the most cloud cover are January and February (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Koblenz, Switzerland
- Average visibility in September: 8km
The months with the highest visibility are April, July and August (9km).
The months with the lowest visibility are January and February (7km).
