September weather forecastSassenheim, Netherlands
September
Weather in September
September, the first month of the autumn in Sassenheim, is still a refreshing month, with an average temperature fluctuating between 13.8°C (56.8°F) and 18.1°C (64.6°F).Temperature
September's advent notes a subtle adjustment in average high-temperature to an enjoyable 18.1°C (64.6°F) from August. Sassenheim records a consistent average nighttime temperature of 13.8°C (56.8°F) in September, slightly lower than the daytime high.Humidity
In Sassenheim, the average relative humidity in September is 77%.Rainfall
In September, the rain falls for 15.6 days. Throughout September, 40mm (1.57") of precipitation is accumulated. Throughout the year, there are 183.4 rainfall days, and 400mm (15.75") of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In Sassenheim, Netherlands, the average length of the day in September is 12h and 39min.On the first day of September in Sassenheim, sunrise is at 06:54 and sunset at 20:29. On the last day of the month, sunrise is at 07:42 and sunset at 19:21 CEST.
Sunshine
In Sassenheim, the average sunshine in September is 7.1h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 4 during September translates into the following directions:
Undertake precautions - Obligation exists to protect against skin and eye damage. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sassenheim, Netherlands
- Average high temperature in September: 18.1°C
The warmest month (with the highest average high temperature) is August (21°C).
The month with the lowest average high temperature is January (5.8°C).
- Average low temperature in September: 13.8°C
The month with the highest average low temperature is August (16.3°C).
The coldest month (with the lowest average low temperature) is February (2.8°C).
Average pressure in September
Sassenheim, Netherlands
- Average pressure in September: 1016.8mbar
The month with the highest atmospheric pressure is September (1016.8mbar).
The month with the lowest atmospheric pressure is November (1011.2mbar).
Average wind speed in September
Sassenheim, Netherlands
- Average wind speed in September: 17.5km/h
The windiest month (with the highest average wind speed) is December (24.7km/h).
The calmest month (with the lowest average wind speed) is July (16.1km/h).
Average humidity in September
Sassenheim, Netherlands
- Average humidity in September: 77%
The months with the highest relative humidity are January and December (83%).
The months with the lowest relative humidity are April and August (75%).
Average rainfall in September
Sassenheim, Netherlands
- Average rainfall in September: 40mm
The wettest month (with the highest rainfall) is August (53mm).
The driest month (with the least rainfall) is April (14mm).
Average rainfall days in September
Sassenheim, Netherlands
- Average rainfall days in September: 15.6 days
The month with the highest number of rainy days is August (19.1 days).
The month with the least rainy days is April (11.3 days).
Average snowfall in September
Sassenheim, Netherlands
- Average snowfall in September: 0mm
The month with the highest snowfall is February (22mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Sassenheim, Netherlands
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.8 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
Sassenheim, Netherlands
- Average daylight in September: 12h and 42min
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 6min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in September
Sassenheim, Netherlands
- Average sunshine days in September: 10.8 days
The month with the most sunshine days is April (16.8 days).
The month with the least sunshine days is December (8.1 days).
Average UV index in September
Sassenheim, 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
Sassenheim, Netherlands
- Average cloud cover in September: 44
The month with the most cloud cover is December (Cloud cover 65).
The months with the least cloud cover are April and August (Cloud cover 38).
Average visibility in September
Sassenheim, Netherlands
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (10km).
The months with the lowest visibility are January and December (9km).
