September weather forecastHoofddorp, Netherlands
September
Weather in September
This month signals a period of gradual transition from summer to fall in Hoofddorp. As cooler air sets in, it's accompanied by shorter daylight hours and reduced sunshine intensity. No significant extremes recorded, however, moderate alterations in weather patterns can be observed. With temperatures falling from the summer highs, noticeable reductions in both daylight and sunshine hours become apparent. As we edge closer towards October, prepare for further temperature dips and increased rainfall amounts.Temperature
September brings a slight decrease in the average high-temperature, shifting from an agreeable 21.3°C (70.3°F) in August to a refreshing 18°C (64.4°F). Hoofddorp observes a slightly reduced average nighttime temperature of 13.1°C (55.6°F) during September.Humidity
In September, the average relative humidity in Hoofddorp is 78%.Rainfall
In Hoofddorp, in September, during 14.4 rainfall days, 39mm (1.54") of precipitation is typically accumulated. Throughout the year, there are 193.2 rainfall days, and 526mm (20.71") of precipitation is accumulated.Snowfall
In Hoofddorp, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 40min.On the first day of the month, sunrise is at 06:53 and sunset at 20:28. On the last day of September, sunrise is at 07:41 and sunset at 19:20 CEST.
Sunshine
The average sunshine in September is 7.3h.UV index
In September, the average daily maximum UV index in Hoofddorp is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 4 in September translates into these instructions:
Act with care - Obligation to protect against skin and eye damage is highlighted. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hoofddorp, Netherlands
- Average high temperature in September: 18°C
The warmest month (with the highest average high temperature) is August (21.3°C).
The month with the lowest average high temperature is January (5.6°C).
- Average low temperature in September: 13.1°C
The month with the highest average low temperature is August (15.3°C).
The coldest months (with the lowest average low temperature) are January and February (2.6°C).
Average pressure in September
Hoofddorp, Netherlands
- Average pressure in September: 1016.7mbar
The month with the highest atmospheric pressure is September (1016.7mbar).
The month with the lowest atmospheric pressure is November (1011.2mbar).
Average wind speed in September
Hoofddorp, Netherlands
- Average wind speed in September: 15.6km/h
The windiest month (with the highest average wind speed) is December (22.2km/h).
The calmest month (with the lowest average wind speed) is July (14.4km/h).
Average humidity in September
Hoofddorp, Netherlands
- Average humidity in September: 78%
The months with the highest relative humidity are January and December (84%).
The month with the lowest relative humidity is April (74%).
Average rainfall in September
Hoofddorp, Netherlands
- Average rainfall in September: 39mm
The wettest month (with the highest rainfall) is December (65mm).
The driest month (with the least rainfall) is April (22mm).
Average rainfall days in September
Hoofddorp, Netherlands
- Average rainfall days in September: 14.4 days
The month with the highest number of rainy days is December (20.5 days).
The month with the least rainy days is October (13 days).
Average snowfall in September
Hoofddorp, Netherlands
- Average snowfall in September: 0mm
The month with the highest snowfall is February (28mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Hoofddorp, Netherlands
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.6 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
Hoofddorp, 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 18min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 3h and 36min).
Average sunshine days in September
Hoofddorp, Netherlands
- Average sunshine days in September: 13 days
The month with the most sunshine days is October (15.5 days).
The month with the least sunshine days is December (6.1 days).
Average UV index in September
Hoofddorp, 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
Hoofddorp, Netherlands
- Average cloud cover in September: 43
The month with the most cloud cover is December (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Hoofddorp, Netherlands
- Average visibility in September: 10km
The months with the highest visibility are April, May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, November and December (9km).
