September weather forecastKarlsruhe, Germany
September
Weather in September
With the arrival of September, the summer heat in Karlsruhe starts to wane, giving way to mild autumnal weather. It's the time of year when the parks and open spaces in the city gradually begin to don an array of fall colors. Temperature continues its downward trend, yet balmy days make way for comfortable strolls around the city. The nature's transition from summer to autumn fills the city with breathtaking landscapes and even the frequent showers don't deter locals or tourists from enjoying the abundance of natural beauty. September is the month to savor the vestiges of warm weather and the early hints of fall foliage.Temperature
September in Karlsruhe brings a minor decrease, with the average high-temperature reducing from a moderately hot 25.8°C (78.4°F) in August to an agreeable 20.7°C (69.3°F). Karlsruhe temperatures generally rest at a low of 10.7°C (51.3°F) during the September nights.Humidity
The average relative humidity in September is 74%.Rainfall
In Karlsruhe, Germany, during September, the rain falls for 10 days and regularly aggregates up to 21mm (0.83") of precipitation. Throughout the year, in Karlsruhe, there are 143.9 rainfall days, and 359mm (14.13") of precipitation is accumulated.Snowfall
In Karlsruhe, snow does not fall in April through September.Daylight
In September, the average length of the day is 12h and 35min.On the first day of the month, sunrise is at 06:43 and sunset at 20:08. On the last day of September, sunrise is at 07:25 and sunset at 19:07 CEST.
Sunshine
In September, the average sunshine in Karlsruhe is 8.8h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: In September, the UV index of 4 transforms into the following advice:
Undertake precautions - Obligation exists to protect against skin and eye damage. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Karlsruhe, Germany
- Average high temperature in September: 20.7°C
The warmest month (with the highest average high temperature) is August (25.8°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 (14.7°C).
The coldest month (with the lowest average low temperature) is January (-0.6°C).
Average pressure in September
Karlsruhe, Germany
- Average pressure in September: 1018.4mbar
The month with the highest atmospheric pressure is December (1019.4mbar).
The month with the lowest atmospheric pressure is November (1015.1mbar).
Average wind speed in September
Karlsruhe, Germany
- Average wind speed in September: 8.7km/h
The windiest month (with the highest average wind speed) is February (12.3km/h).
The calmest month (with the lowest average wind speed) is August (8.6km/h).
Average humidity in September
Karlsruhe, Germany
- Average humidity in September: 74%
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are July and August (69%).
Average rainfall in September
Karlsruhe, Germany
- Average rainfall in September: 21mm
The wettest month (with the highest rainfall) is May (45mm).
The driest month (with the least rainfall) is April (17mm).
Average rainfall days in September
Karlsruhe, Germany
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is September (10 days).
Average snowfall in September
Karlsruhe, Germany
- Average snowfall in September: 0mm
The month with the highest snowfall is December (44mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).
Average snowfall days in September
Karlsruhe, Germany
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.2 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Karlsruhe, Germany
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in September
Karlsruhe, Germany
- Average sunshine days in September: 17.9 days
The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is December (13 days).
Average UV index in September
Karlsruhe, Germany
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Karlsruhe, Germany
- Average cloud cover in September: 35
The months with the most cloud cover are January and December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Karlsruhe, Germany
- Average visibility in September: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (9km).
The months with the lowest visibility are January and December (8km).
