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
Weather in September
Temperature
September witnesses a gentle descent in average high-temperature, descending from August's agreeable 22°C (71.6°F) to a comfortable 18°C (64.4°F). Throughout September, the nighttime temperature averages to a frosty 8.8°C (47.8°F).Humidity
The average relative humidity in September is 81%.Rainfall
The months with the least rainfall in Altenahr, Germany, are April and September Rain falls for 13.4 days and accumulates 34mm (1.34") of rain.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Altenahr is 12h and 37min.On the first day of September, sunrise is at 06:47 and sunset at 20:16. On the last day of the month, sunrise is at 07:31 and sunset at 19:12 CEST.
Sunshine
The average sunshine in September in Altenahr is 8.2h.UV index
In Altenahr, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 3 in September interprets into the following recommendations:
Ensure safety - Recommendations to avert sunburn are presented. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Frequently asked questions
What is the average September temperature in Altenahr?
What is the average humidity in September in Altenahr?
What is the driest month in Altenahr?
How many days does it rain in September in Altenahr?
When it does not snow in Altenahr?
Does it snow in Altenahr in September?
What is the average length of the day in September in Altenahr?
When are sunrise and sunset in September in Altenahr?
How long on average sun shines in September in Altenahr?
How high is the UV index in September in Altenahr?
Average temperature in September
Altenahr, Germany
- Average high temperature in September: 18°C
The warmest month (with the highest average high temperature) is July (22.3°C).
The month with the lowest average high temperature is January (2.8°C).
- Average low temperature in September: 8.8°C
The month with the highest average low temperature is August (12.3°C).
The coldest month (with the lowest average low temperature) is January (-1.4°C).
Average pressure in September
Altenahr, 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 (1013.8mbar).
Average wind speed in September
Altenahr, Germany
- Average wind speed in September: 9.5km/h
The windiest month (with the highest average wind speed) is December (14.1km/h).
The calmest month (with the lowest average wind speed) is August (9.1km/h).
Average humidity in September
Altenahr, Germany
- Average humidity in September: 81%
The months with the highest relative humidity are January, November and December (90%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Altenahr, Germany
- Average rainfall in September: 34mm
The wettest months (with the highest rainfall) are May and June (65mm).
The driest months (with the least rainfall) are April and September (34mm).
Average rainfall days in September
Altenahr, Germany
- Average rainfall days in September: 13.4 days
The month with the highest number of rainy days is July (20.6 days).
The month with the least rainy days is February (9.5 days).
Average snowfall in September
Altenahr, Germany
- Average snowfall in September: 0mm
The month with the highest snowfall is February (142mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Altenahr, Germany
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (12.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Altenahr, 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 6min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 18min).
Average sunshine days in September
Altenahr, Germany
- Average sunshine days in September: 12.9 days
The month with the most sunshine days is October (14.5 days).
The month with the least sunshine days is June (7.5 days).
Average UV index in September
Altenahr, Germany
- Average UV index in September: 3
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
Altenahr, Germany
- Average cloud cover in September: 42
The month with the most cloud cover is December (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 39).
Average visibility in September
Altenahr, Germany
- Average visibility in September: 8km
The months with the highest visibility are April and August (9km).
The months with the lowest visibility are January, October, November and December (7km).
Altenahr, Germany
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