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
A moderate decline in average high-temperatures is noted in September, moving from a pleasant 22°C (71.6°F) in August to a comfortable 18.7°C (65.7°F). An average low-temperature of 12.8°C (55°F) is noted in Boskoop during the month of September.Humidity
The average relative humidity in September is 78%.Rainfall
In September, in Boskoop, the rain falls for 9.4 days. Throughout September, 13mm (0.51") of precipitation is accumulated. Throughout the year, in Boskoop, there are 130.3 rainfall days, and 205mm (8.07") of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In Boskoop, the average length of the day in September is 12h and 39min.On the first day of the month, sunrise is at 06:54 and sunset at 20:28. On the last day of September, in Boskoop, Netherlands, sunrise is at 07:41 and sunset at 19:20 CEST.
Sunshine
In Boskoop, the average sunshine in September is 7.1h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The UV index of 4 during September leads to these advisories:
Guard yourself - Avoiding sunburn is suggested. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Boskoop in September?
What is the average humidity in September in Boskoop?
How many days does it rain in September in Boskoop?
When it does not snow in Boskoop?
What is the average length of the day in September in Boskoop?
When are sunrise and sunset in September in Boskoop?
How long on average sun shines in September in Boskoop?
What is the UV index reading in September in Boskoop?
Average temperature in September
Boskoop, Netherlands
- Average high temperature in September: 18.7°C
The warmest months (with the highest average high temperature) are July and August (22°C).
The month with the lowest average high temperature is January (5.6°C).
- Average low temperature in September: 12.8°C
The month with the highest average low temperature is August (15.3°C).
The coldest month (with the lowest average low temperature) is February (2.3°C).
Average pressure in September
Boskoop, Netherlands
- Average pressure in September: 1017mbar
The month with the highest atmospheric pressure is September (1017mbar).
The month with the lowest atmospheric pressure is November (1011.4mbar).
Average wind speed in September
Boskoop, Netherlands
- Average wind speed in September: 14km/h
The windiest month (with the highest average wind speed) is December (20.2km/h).
The calmest months (with the lowest average wind speed) are July and August (13.6km/h).
Average humidity in September
Boskoop, Netherlands
- Average humidity in September: 78%
The month with the highest relative humidity is December (85%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Boskoop, Netherlands
- Average rainfall in September: 13mm
The wettest month (with the highest rainfall) is June (24mm).
The driest month (with the least rainfall) is April (9mm).
Average rainfall days in September
Boskoop, Netherlands
- Average rainfall days in September: 9.4 days
The month with the highest number of rainy days is July (13.8 days).
The month with the least rainy days is February (8.5 days).
Average snowfall in September
Boskoop, Netherlands
- Average snowfall in September: 0mm
The month with the highest snowfall is February (19mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Boskoop, Netherlands
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.2 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
Boskoop, Netherlands
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 42min).
The month with the shortest days is December (Average daylight: 7h and 48min).
- Average sunshine in September: 7h and 1min
The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in September
Boskoop, Netherlands
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is April (17.5 days).
The month with the least sunshine days is July (13 days).
Average UV index in September
Boskoop, Netherlands
- 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
Boskoop, Netherlands
- Average cloud cover in September: 45
The month with the most cloud cover is December (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 40).
Average visibility in September
Boskoop, Netherlands
- Average visibility in September: 9km
The months with the highest visibility are April, May, June and August (10km).
The months with the lowest visibility are January, February, March, July, September, October, November and December (9km).
Boskoop, Netherlands
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