September weather forecastAmsterdam, Netherlands
September
Weather in September
September sees a decline in temperature from summer's peak, making it a comfortable time to visit Amsterdam. The city is likely less crowded with tourists and the weather is relatively dry. Early autumn paints the city in hues of red and gold, adding a different charm to the historic cityscape. The duration of daylight gradually shortens as the month proceeds.Temperature
In Amsterdam, entering September brings a subtle temperature decrement, reducing from August's pleasant 21.6°C (70.9°F) to a comfortable 18.2°C (64.8°F). Amsterdam experiences a steady low-temperature of 12.5°C (54.5°F) throughout September.Humidity
In September, the average relative humidity is 80%.Rainfall
In September, the rain falls for 15.7 days. Throughout September, 45mm (1.77") of precipitation is accumulated. In Amsterdam, during the entire year, the rain falls for 189.3 days and collects up to 510mm (20.08") of precipitation.Snowfall
April through October are months without snowfall.Sea temperature
In Amsterdam, in September, the average water temperature is 18.1°C (64.6°F).Note: In water with a temperature of 18.1°C (64.6°F), most individuals do not find swimming enjoyable. As the temperature falls from 21°C (69.8°F) to 15°C (59°F), breathing control becomes more difficult.
Daylight
In September, the average length of the day in Amsterdam, Netherlands, is 12h and 40min.On the first day of September in Amsterdam, sunrise is at 06:52 and sunset at 20:27. On the last day of the month, sunrise is at 07:40 and sunset at 19:19 CEST.
Sunshine
In Amsterdam, the average sunshine in September is 7.1h.UV index
The average daily maximum UV index in September in Amsterdam, Netherlands, is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: In September, an average UV index of 4 transforms into the following instructions:
Take precautions - Protection against sun damage is advised. It's recommended to limit sun exposure when its radiation is at its peak during midday. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Amsterdam, Netherlands
- Average high temperature in September: 18.2°C
The warmest month (with the highest average high temperature) is August (21.6°C).
The month with the lowest average high temperature is January (5.3°C).
- Average low temperature in September: 12.5°C
The month with the highest average low temperature is August (15°C).
The coldest month (with the lowest average low temperature) is February (2°C).
Average pressure in September
Amsterdam, 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
Amsterdam, Netherlands
- Average wind speed in September: 14km/h
The windiest month (with the highest average wind speed) is December (20.4km/h).
The calmest months (with the lowest average wind speed) are July and August (13.2km/h).
Average humidity in September
Amsterdam, Netherlands
- Average humidity in September: 80%
The month with the highest relative humidity is December (86%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Amsterdam, Netherlands
- Average rainfall in September: 45mm
The wettest month (with the highest rainfall) is August (55mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in September
Amsterdam, Netherlands
- Average rainfall days in September: 15.7 days
The month with the highest number of rainy days is August (18.8 days).
The month with the least rainy days is April (12.2 days).
Average snowfall in September
Amsterdam, 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
Amsterdam, 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 sea temperature in September
Amsterdam, Netherlands
- Average sea temperature in September: 18.1°C
The best month for swimming (with the highest average sea temperature) is August (18.3°C).
The coldest months (with the lowest average sea temperature) are January and February (6.4°C).
Average daylight in September /
Average sunshine in September
Amsterdam, 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 months with the most sunshine are June and July (Average sunshine: 9h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in September
Amsterdam, Netherlands
- Average sunshine days in September: 11.1 days
The month with the most sunshine days is March (15.1 days).
The month with the least sunshine days is December (8 days).
Average UV index in September
Amsterdam, 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
Amsterdam, 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
Amsterdam, Netherlands
- Average visibility in September: 9km
The months with the highest visibility are April, June and August (10km).
The months with the lowest visibility are January, February, March, May, July, September, October, November and December (9km).
