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
The average high-temperature slightly decreases in September, shifting from a warm 23.1°C (73.6°F) in August to a refreshing 19.5°C (67.1°F). Heidam's nighttime temperature during September is consistently averaged at a fresh 11.5°C (52.7°F).Humidity
In September, the average relative humidity in Heidam is 78%.Rainfall
In September, in Heidam, the rain falls for 11.7 days. Throughout September, 22mm (0.87") of precipitation is accumulated. Throughout the year, there are 179.3 rainfall days, and 449mm (17.68") of precipitation is accumulated.Snowfall
In Heidam, snow does not fall in April through October.Daylight
In Heidam, the average length of the day in September is 12h and 38min.On the first day of the month, sunrise is at 06:56 and sunset at 20:28. On the last day of September, sunrise is at 07:42 and sunset at 19:22 CEST.
Sunshine
In Heidam, the average sunshine in September is 7.6h.UV index
In Heidam, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Heidam in September?
What is the average humidity in September in Heidam?
How much does it rain in Heidam in September?
When it does not snow in Heidam?
How many hours of daylight does Heidam have in September?
When are sunrise and sunset in September in Heidam?
How many hours of sunshine does Heidam have in September?
What is the UV index reading in September in Heidam?
Average temperature in September
Heidam, Belgium
- Average high temperature in September: 19.5°C
The warmest months (with the highest average high temperature) are July and August (23.1°C).
The month with the lowest average high temperature is January (5.4°C).
- Average low temperature in September: 11.5°C
The month with the highest average low temperature is August (14.3°C).
The coldest months (with the lowest average low temperature) are January and February (1.6°C).
Average pressure in September
Heidam, Belgium
- Average pressure in September: 1017.4mbar
The month with the highest atmospheric pressure is September (1017.4mbar).
The month with the lowest atmospheric pressure is November (1012.2mbar).
Average wind speed in September
Heidam, Belgium
- Average wind speed in September: 11.8km/h
The windiest month (with the highest average wind speed) is December (17.2km/h).
The calmest month (with the lowest average wind speed) is August (11.6km/h).
Average humidity in September
Heidam, Belgium
- Average humidity in September: 78%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Heidam, Belgium
- Average rainfall in September: 22mm
The wettest month (with the highest rainfall) is December (57mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in September
Heidam, Belgium
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is December (18.7 days).
The month with the least rainy days is September (11.7 days).
Average snowfall in September
Heidam, Belgium
- Average snowfall in September: 0mm
The months with the highest snowfall are January and February (31mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Heidam, Belgium
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.3 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
Heidam, Belgium
- 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: 8h and 0min).
- Average sunshine in September: 7h and 4min
The month with the most sunshine is June (Average sunshine: 9h and 24min).
The month with the least sunshine is December (Average sunshine: 3h and 42min).
Average sunshine days in September
Heidam, Belgium
- Average sunshine days in September: 15.8 days
The month with the most sunshine days is September (15.8 days).
The month with the least sunshine days is December (8.2 days).
Average UV index in September
Heidam, Belgium
- Average UV index in September: 4
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
Heidam, Belgium
- Average cloud cover in September: 44
The month with the most cloud cover is December (Cloud cover 63).
The months with the least cloud cover are April and August (Cloud cover 41).
Average visibility in September
Heidam, Belgium
- Average visibility in September: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is January (8km).
Heidam, Belgium
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