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
September is marked by a subtle drop in average high-temperatures, transitioning from a pleasant 22.8°C (73°F) in August to a refreshing 18.1°C (64.6°F). During September, Ulm's temperature averages to a frosty 8.5°C (47.3°F) at night.Humidity
The average relative humidity in September is 83%.Rainfall
In September, the rain falls for 15 days. Throughout September, 48mm (1.89") of precipitation is accumulated. In Ulm, during the entire year, the rain falls for 178.1 days and collects up to 685mm (26.97") of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 35min.On the first day of the month, sunrise is at 06:38 and sunset at 20:01. On the last day of September, sunrise is at 07:18 and sunset at 19:01 CEST.
Sunshine
In Ulm, the average sunshine in September is 8.6h.UV index
In Ulm, Germany, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: The UV index of 3 during September translates into the following guidance:
Be vigilant - Suggestions to stave off sun damage are provided. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Ulm in September?
What is the average humidity in September in Ulm?
How many days does it rain in September in Ulm?
When it does not snow in Ulm?
Does it snow in Ulm in September?
How many hours of daylight does Ulm have in September?
What time are sunrise and sunset in September in Ulm?
How long on average sun shines in September in Ulm?
How high is the UV index in September in Ulm?
Average temperature in September
Ulm, Germany
- Average high temperature in September: 18.1°C
The warmest month (with the highest average high temperature) is August (22.8°C).
The month with the lowest average high temperature is January (1.9°C).
- Average low temperature in September: 8.5°C
The month with the highest average low temperature is August (12.4°C).
The coldest month (with the lowest average low temperature) is February (-3.3°C).
Average pressure in September
Ulm, 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 November (1015.6mbar).
Average wind speed in September
Ulm, Germany
- Average wind speed in September: 8.8km/h
The windiest month (with the highest average wind speed) is December (13.4km/h).
The calmest month (with the lowest average wind speed) is August (8.6km/h).
Average humidity in September
Ulm, Germany
- Average humidity in September: 83%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is April (78%).
Average rainfall in September
Ulm, Germany
- Average rainfall in September: 48mm
The wettest month (with the highest rainfall) is August (95mm).
The driest month (with the least rainfall) is February (33mm).
Average rainfall days in September
Ulm, Germany
- Average rainfall days in September: 15 days
The month with the highest number of rainy days is May (22.1 days).
The month with the least rainy days is February (7 days).
Average snowfall in September
Ulm, Germany
- Average snowfall in September: 0mm
The months with the highest snowfall are January and December (87mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Ulm, Germany
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Ulm, Germany
- Average daylight in September: 12h and 4min
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 4min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Ulm, Germany
- Average sunshine days in September: 12.8 days
The months with the most sunshine days are October and November (15.9 days).
The month with the least sunshine days is May (7 days).
Average UV index in September
Ulm, Germany
- Average UV index in September: 3
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
Ulm, Germany
- Average cloud cover in September: 41
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in September
Ulm, Germany
- Average visibility in September: 8km
The months with the highest visibility are April, June, July and August (9km).
The months with the lowest visibility are January and February (7km).
