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 arrival of September signals a subtle shift in temperature, down from a warm 23.3°C (73.9°F) in August to a comfortable 19.3°C (66.7°F). Knapsack's average low-temperature in the month of September is recorded at a cool 10.7°C (51.3°F).Humidity
In Knapsack, the average relative humidity in September is 77%.Rainfall
In Knapsack, in September, it is raining for 10.9 days, with typically 20mm (0.79") of accumulated precipitation. Throughout the year, there are 166.3 rainfall days, and 358mm (14.09") of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 38min.On the first day of the month, sunrise is at 06:47 and sunset at 20:17. On the last day of September, sunrise is at 07:32 and sunset at 19:12 CEST.
Sunshine
In Knapsack, the average sunshine in September is 8.5h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 4 in September translates into this advice:
Take necessary precautions - Defending against sun damage is advocated. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Knapsack in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow in Knapsack?
How many hours of daylight does Knapsack have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Knapsack, Germany
- Average high temperature in September: 19.3°C
The warmest month (with the highest average high temperature) is July (23.7°C).
The month with the lowest average high temperature is January (4.3°C).
- Average low temperature in September: 10.7°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (0.1°C).
Average pressure in September
Knapsack, Germany
- Average pressure in September: 1017.7mbar
The month with the highest atmospheric pressure is September (1017.7mbar).
The month with the lowest atmospheric pressure is November (1013.5mbar).
Average wind speed in September
Knapsack, Germany
- Average wind speed in September: 9.7km/h
The windiest month (with the highest average wind speed) is February (14.1km/h).
The calmest month (with the lowest average wind speed) is August (9.6km/h).
Average humidity in September
Knapsack, Germany
- Average humidity in September: 77%
The months with the highest relative humidity are January and December (87%).
The month with the lowest relative humidity is August (72%).
Average rainfall in September
Knapsack, Germany
- Average rainfall in September: 20mm
The wettest months (with the highest rainfall) are June and August (38mm).
The driest month (with the least rainfall) is April (19mm).
Average rainfall days in September
Knapsack, Germany
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is September (10.9 days).
Average snowfall in September
Knapsack, Germany
- Average snowfall in September: 0mm
The month with the highest snowfall is February (34mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Knapsack, Germany
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (4.8 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
Knapsack, Germany
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 0min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 0min).
Average sunshine days in September
Knapsack, Germany
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is October (16.6 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in September
Knapsack, Germany
- 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
Knapsack, Germany
- Average cloud cover in September: 39
The month with the most cloud cover is December (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in September
Knapsack, Germany
- Average visibility in September: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September and October (9km).
The months with the lowest visibility are January, November and December (8km).
