September in Amsterdam features comfortable to cool afternoons with chilly to cold nights.
Daytime high temperatures tend to be 19-20 C (66-68 F) early in the month falling to 16-18 C (61-64 F) near the end of this month.
A few of the warmer afternoons, especially early in the month, can reach up near 24-25 C (75-77 F).
The record high temperature in Amsterdam during September is 31.0 C (87.8 F).
Late night and early morning low temperatures typically are near 12 C (53-54 F) early in the month, falling to 9-10 C (48-50 F) near the end of the month.
A few of the colder mornings, especially near the end of the month, can dip down near 6 C (43 F).
The record low temperature for Amsterdam during September is 2.0 C (35.6 F).
Sun and Rain
During September, Amsterdam normally sees about 11 mostly sunny days, 7-8 partly sunny, and 11-12 mostly cloudy days.
Some rain normally falls on about 17 days, however, only about 10 days record rainfall amounts of 1 mm (0.04 inches) or more.
The number of daylight hours decreases rapidly this month from about 13.6 hours on the 1st to about 11.7 hours by the 30th.
During August, wind speeds will be mostly gentle to moderate at 12-28 kph (8-18 mph) but can briefly be fresh at 39-38 kph (19-24 mph).
The beaches near Amsterdam are more rugged but offer great photo ops as well as many water sports.
Ocean temperatures tend to be chilly during September, averaging mostly 16-18 C (61-64 F).
What to Wear in Amsterdam During September?
Autumn begins this month in Amsterdam so bring along a couple of long-sleeved shirts and sweaters and a light-weight jacket for the chillier days and colder nights.
For the warmer afternoons, light cotton tops and lighter-weight pants and shirts are best.
For rainy days, pack an umbrella or light rain jacket and don’t forget to bring comfortable walking shoes.
Things to Do in Amsterdam in September
Although the summer is nearing its end, there should still be quite a few sunny days this month, which means this would be as good a time as any to take a free walking tour in Amsterdam.
Another fun idea is to enjoy one of the many canal cruises that are always available throughout the year, as they offer a different perspective of the city.
Since fall is on the horizon, you might want to take advantage of the last few warm days of the year with a walk through Vondelpark.
For even more ideas, make sure to check our post covering things to do in Amsterdam.