September weather forecastIserlohn, Germany
September
Weather in September
September, the first month of the autumn in Iserlohn, is still a comfortable month, with an average temperature ranging between max 18.5°C (65.3°F) and min 10.1°C (50.2°F).Temperature
With the onset of September, Iserlohn experiences a modest temperature adjustment, with the average high-temperature gently receding from a pleasant 22.7°C (72.9°F) in August to an enjoyable 18.5°C (65.3°F). Iserlohn experiences a mean low-temperature of 10.1°C (50.2°F) during September.Humidity
In Iserlohn, the average relative humidity in September is 79%.Rainfall
The months with the least rainfall in Iserlohn are April and September Rain falls for 13.2 days and accumulates 32mm (1.26") of rain.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 38min.On the first day of September in Iserlohn, sunrise is at 06:42 and sunset at 20:15. On the last day of the month, sunrise is at 07:29 and sunset at 19:08 CEST.
Sunshine
The average sunshine in September is 8.3h.UV index
The average daily maximum UV index in September in Iserlohn is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 3 suggests this advice:
Prioritize safety - Suggestions to prevent sun damage are offered. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Iserlohn, Germany
- Average high temperature in September: 18.5°C
The warmest months (with the highest average high temperature) are July and August (22.7°C).
The month with the lowest average high temperature is January (3.5°C).
- Average low temperature in September: 10.1°C
The month with the highest average low temperature is August (13.5°C).
The coldest month (with the lowest average low temperature) is January (-0.5°C).
Average pressure in September
Iserlohn, Germany
- Average pressure in September: 1017.6mbar
The month with the highest atmospheric pressure is September (1017.6mbar).
The month with the lowest atmospheric pressure is November (1013.3mbar).
Average wind speed in September
Iserlohn, Germany
- Average wind speed in September: 10km/h
The windiest month (with the highest average wind speed) is December (14.7km/h).
The calmest month (with the lowest average wind speed) is August (9.7km/h).
Average humidity in September
Iserlohn, Germany
- Average humidity in September: 79%
The months with the highest relative humidity are January and December (89%).
The month with the lowest relative humidity is August (74%).
Average rainfall in September
Iserlohn, Germany
- Average rainfall in September: 32mm
The wettest month (with the highest rainfall) is December (76mm).
The driest months (with the least rainfall) are April and September (32mm).
Average rainfall days in September
Iserlohn, Germany
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (18.7 days).
The month with the least rainy days is September (13.2 days).
Average snowfall in September
Iserlohn, Germany
- Average snowfall in September: 0mm
The month with the highest snowfall is January (116mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Iserlohn, Germany
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Iserlohn, Germany
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in September
Iserlohn, Germany
- Average sunshine days in September: 13.7 days
The month with the most sunshine days is September (13.7 days).
The month with the least sunshine days is December (6.6 days).
Average UV index in September
Iserlohn, 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
Iserlohn, Germany
- Average cloud cover in September: 43
The month with the most cloud cover is December (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Iserlohn, Germany
- Average visibility in September: 8km
The months with the highest visibility are April, May, June, July and August (9km).
The months with the lowest visibility are January, February, March, September, October, November and December (8km).
