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
As September commences, the average high-temperature subtly reduces, transitioning from a moderately hot 23°C (73.4°F) in August to a comfortable 18.8°C (65.8°F). Herdecke observes an average nighttime low-temperature of 10.5°C (50.9°F) during the month of September.Humidity
In Herdecke, the average relative humidity in September is 78%.Rainfall
In September, in Herdecke, the rain falls for 13.7 days. Throughout September, 29mm (1.14") of precipitation is accumulated. Throughout the year, there are 183.3 rainfall days, and 518mm (20.39") of precipitation is accumulated.Snowfall
May through October are months without snowfall in Herdecke.Daylight
The average length of the day in September in Herdecke is 12h and 38min.On the first day of September, sunrise is at 06:43 and sunset at 20:16. On the last day of the month, sunrise is at 07:30 and sunset at 19:10 CEST.
Sunshine
The average sunshine in September in Herdecke is 8.2h.UV index
In Herdecke, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 3 during September translates into the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Herdecke?
What is the average humidity in September in Herdecke?
How much does it rain in Herdecke in September?
When it does not snow in Herdecke?
How many hours of daylight does Herdecke have in September?
When are sunrise and sunset in September in Herdecke?
How many hours of sunshine does Herdecke have in September?
How high is the UV index in September in Herdecke?
Average temperature in September
Herdecke, Germany
- Average high temperature in September: 18.8°C
The warmest month (with the highest average high temperature) is August (23°C).
The month with the lowest average high temperature is January (3.8°C).
- Average low temperature in September: 10.5°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (-0.3°C).
Average pressure in September
Herdecke, 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 (1013.2mbar).
Average wind speed in September
Herdecke, Germany
- Average wind speed in September: 10.3km/h
The windiest month (with the highest average wind speed) is December (15.1km/h).
The calmest month (with the lowest average wind speed) is August (10.1km/h).
Average humidity in September
Herdecke, Germany
- Average humidity in September: 78%
The month with the highest relative humidity is December (89%).
The month with the lowest relative humidity is August (72%).
Average rainfall in September
Herdecke, Germany
- Average rainfall in September: 29mm
The wettest month (with the highest rainfall) is December (63mm).
The driest month (with the least rainfall) is April (28mm).
Average rainfall days in September
Herdecke, Germany
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is July (18.2 days).
The month with the least rainy days is February (12.7 days).
Average snowfall in September
Herdecke, Germany
- Average snowfall in September: 0mm
The month with the highest snowfall is January (69mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Herdecke, Germany
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.4 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
Herdecke, Germany
- Average daylight in September: 12h and 4min
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 1min
The month with the most sunshine is August (Average sunshine: 9h and 30min).
The months with the least sunshine are January and December (Average sunshine: 3h and 30min).
Average sunshine days in September
Herdecke, Germany
- Average sunshine days in September: 13.4 days
The month with the most sunshine days is October (14.5 days).
The month with the least sunshine days is December (9.5 days).
Average UV index in September
Herdecke, Germany
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Herdecke, 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 39).
Average visibility in September
Herdecke, 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).
