September weather forecastGrasbrunn, Germany
September
Weather in September
September, the first month of the autumn in Grasbrunn, is still a refreshing month, with temperature in the range of an average high of 18.5°C (65.3°F) and an average low of 8.9°C (48°F).Temperature
The onset of September results in a small decrease in the average high-temperature, moderately receding from a warm 23.3°C (73.9°F) in August to an enjoyable 18.5°C (65.3°F). During September, Grasbrunn records an average temperature of 8.9°C (48°F) at night.Humidity
In Grasbrunn, the average relative humidity in September is 83%.Rainfall
In September, the rain falls for 12.5 days. Throughout September, 41mm (1.61") of precipitation is accumulated. Throughout the year, in Grasbrunn, there are 152.4 rainfall days, and 622mm (24.49") of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Grasbrunn, Germany, the average length of the day in September is 12h and 35min.On the first day of the month, sunrise is at 06:31 and sunset at 19:54. On the last day of September, in Grasbrunn, sunrise is at 07:11 and sunset at 18:54 CEST.
Sunshine
The average sunshine in September in Grasbrunn is 8.6h.UV index
The average daily maximum UV index in September in Grasbrunn is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: An average maximum UV index of 4 in September leads to these recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. 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
Average temperature in September
Grasbrunn, Germany
- Average high temperature in September: 18.5°C
The warmest month (with the highest average high temperature) is August (23.3°C).
The month with the lowest average high temperature is January (2°C).
- Average low temperature in September: 8.9°C
The month with the highest average low temperature is August (12.9°C).
The coldest month (with the lowest average low temperature) is January (-2.9°C).
Average pressure in September
Grasbrunn, Germany
- Average pressure in September: 1018.7mbar
The month with the highest atmospheric pressure is December (1020.2mbar).
The month with the lowest atmospheric pressure is April (1015.7mbar).
Average wind speed in September
Grasbrunn, Germany
- Average wind speed in September: 8.5km/h
The windiest month (with the highest average wind speed) is March (12.7km/h).
The calmest month (with the lowest average wind speed) is August (8.3km/h).
Average humidity in September
Grasbrunn, Germany
- Average humidity in September: 83%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is April (77%).
Average rainfall in September
Grasbrunn, Germany
- Average rainfall in September: 41mm
The wettest month (with the highest rainfall) is July (80mm).
The driest month (with the least rainfall) is November (22mm).
Average rainfall days in September
Grasbrunn, Germany
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is June (18.4 days).
The month with the least rainy days is February (7.4 days).
Average snowfall in September
Grasbrunn, Germany
- Average snowfall in September: 0mm
The month with the highest snowfall is January (185mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Grasbrunn, Germany
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grasbrunn, Germany
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Grasbrunn, Germany
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is June (9.8 days).
Average UV index in September
Grasbrunn, Germany
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in September
Grasbrunn, Germany
- Average cloud cover in September: 40
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Grasbrunn, Germany
- Average visibility in September: 8km
The months with the highest visibility are March, April, May, June, July and August (9km).
The month with the lowest visibility is January (7km).
