September weather forecastTroisdorf, Germany
September
Weather in September
September, the first month of the autumn in Troisdorf, is also an enjoyable month, with temperature in the range of an average low of 9.8°C (49.6°F) and an average high of 18.9°C (66°F).Temperature
The transition to September results in a modest reduction in average high-temperature, moving from a moderately hot 23.3°C (73.9°F) in August to an enjoyable 18.9°C (66°F). Troisdorf records an average temperature drop to a chilly 9.8°C (49.6°F) in September.Humidity
The average relative humidity in September is 78%.Rainfall
April and September are months with the least rain in Troisdorf when the rain falls for 10.5 days and typically aggregates up to 17mm (0.67") of rain.Snowfall
In Troisdorf, snow does not fall in April through October.Daylight
In Troisdorf, Germany, the average length of the day in September is 12h and 38min.On the first day of September, sunrise is at 06:46 and sunset at 20:16. On the last day of the month, sunrise is at 07:31 and sunset at 19:11 CEST.
Sunshine
In September, the average sunshine is 8.4h.UV index
In Troisdorf, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A daily high UV index of 4 in September leads to these guidelines:
Heed the precautions - Suggestions to avoid sunburn are made. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Troisdorf, Germany
- Average high temperature in September: 18.9°C
The warmest month (with the highest average high temperature) is July (23.5°C).
The month with the lowest average high temperature is January (4°C).
- Average low temperature in September: 9.8°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is January (-0.3°C).
Average pressure in September
Troisdorf, Germany
- Average pressure in September: 1017.8mbar
The month with the highest atmospheric pressure is September (1017.8mbar).
The month with the lowest atmospheric pressure is November (1013.6mbar).
Average wind speed in September
Troisdorf, Germany
- Average wind speed in September: 9.1km/h
The windiest month (with the highest average wind speed) is February (12.8km/h).
The calmest month (with the lowest average wind speed) is August (8.9km/h).
Average humidity in September
Troisdorf, Germany
- Average humidity in September: 78%
The month with the highest relative humidity is December (89%).
The months with the lowest relative humidity are July and August (73%).
Average rainfall in September
Troisdorf, Germany
- Average rainfall in September: 17mm
The wettest month (with the highest rainfall) is August (33mm).
The driest months (with the least rainfall) are April and September (17mm).
Average rainfall days in September
Troisdorf, Germany
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is July (15.6 days).
The month with the least rainy days is February (10.4 days).
Average snowfall in September
Troisdorf, Germany
- Average snowfall in September: 0mm
The month with the highest snowfall is February (35mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Troisdorf, Germany
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6 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
Troisdorf, Germany
- Average daylight in September: 12h and 36min
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 24min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is December (Average sunshine: 3h and 48min).
Average sunshine days in September
Troisdorf, Germany
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is October (16.5 days).
The month with the least sunshine days is December (11.4 days).
Average UV index in September
Troisdorf, Germany
- 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
Troisdorf, Germany
- Average cloud cover in September: 40
The month with the most cloud cover is December (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in September
Troisdorf, Germany
- Average visibility in September: 8km
The months with the highest visibility are March, April, May, June, July and August (9km).
The months with the lowest visibility are January, February, September, October, November and December (8km).
