Best time to go

Alkmaar in September 2026: weather, temperatures and activities

Do you want to visit Alkmaar in September 2026? Discover the usual weather at this time of year, average temperatures, the risk of rain, possible activities, and our opinion on whether September is a good month to travel to Alkmaar, Netherlands.

Custom search

Is it worth visiting Alkmaar in September?

Check your ideal travel criteria and see if the month of September suits your plans to go to Alkmaar.
What matters most?
Alkmaar in September 2026: weather, temperatures and activities

Page summary

Alkmaar in September in summary
Favourable weather
Min 14°C Max 18°C 109 mm 7 day(s) 85% 43% 19°C 10.3 h/day
Best activities in September
Cultural visits and heritageNightlifeGastronomy
Practical guidelines
High crowding 06:15 18:56
Hourly weather

Average weather in Alkmaar in September 2026

Favourable weather

The weather in Alkmaar in September 2026 is based on statistical data from previous years in September. This allows you to forecast the weather in September 2026. Check the hourly statistics (6:00, 9:00, 12:00, 15:00, 18:00, 21:00, 0:00 and 3:00), with the associated average temperature, for the whole month, and also, by navigating the tabs, for the beginning, middle and end of the month.

Loading hourly weather...
Loading hourly weather...
Loading hourly weather...
Climate

Climate of Alkmaar in September

Temperatures, precipitation and monthly trends help to better understand the climate in Alkmaar in September.

Temperatures and rain in Alkmaar in September

Average daily weather

Temperatures and rain day by day in September.
Minimal Average Maximums Average rainfall

Monthly temperatures

The month of September is highlighted to compare it quickly with the rest of the year.
Minimal Average Maximums

Monthly precipitation

The bar for the month under study is highlighted.
Average rainfall

About the climate in Alkmaar in September

Seasonal normals

Seasonal normals of Alkmaar in September

Check the seasonal normals in Alkmaar in September and compare the weather with the previous month and the following month (or the months of your choice by selecting months in the form below): temperatures, wind, rain, humidity, climate rating...

Last updated: 12/01/2026
Reference period for normals: January 2009 - December 2025
Month analyzed
September
Weather data August September October
Outside temperature
Average temperature 18.8°C 16.2°C 12.8°C
Maximum temperature 20.9°C 18.4°C 14.6°C
Minimum temperature 16.7°C 14.1°C 11.1°C
Record maximum temperature 32.0°C
(2016)
29.0°C
(2016)
25.0°C
(2011)
Record low temperature 12.0°C
(2014)
8.0°C
(2010)
3.0°C
(2015)
Number of days at +30° 1 day(s)
(3%)
0 day(s)
(0%)
0 day(s)
(0%)
Number of days at +18° 28 day(s)
(90%)
17 day(s)
(57%)
4 day(s)
(13%)
Number of days below 0° 0 day(s)
(0%)
0 day(s)
(0%)
0 day(s)
(0%)
Sea temperature
Sea temperature (average) 17.7°C 17.7°C 15.5°C
Sea temperature (minimum) 16.2°C 16.2°C 13.1°C
Sea temperature (maximum) 19.4°C 19.3°C 17.5°C
Wind
Wind speed 20 km/h 21 km/h 24 km/h
Wind temperature 16.4°C 13.1°C 9.0°C
Precipitation (rain)
Precipitation 142.2 mm 108.9 mm 114.6 mm
Number of days with precipitation 20 day(s)
(65%)
16 day(s)
(53%)
18 day(s)
(58%)
Number of days with significant precipitation (greater than 5 mm) 9 day(s)
(30%)
7 day(s)
(23%)
7 day(s)
(24%)
Record precipitation in one day 46.7 mm
(2010)
53.1 mm
(2017)
36.5 mm
(2013)
Other weather data
Humidity 83% 85% 85%
Visibility 9.4 km 9.4 km 9.2 km
Cloud cover 39% 43% 54%
UV index 5 4 4
Daily sunshine 13h 10h 7h
Sunrise and sunset
Sunrise time 05h24 06h15 07h07
Sunset time 20h06 18h56 17h46
Day length 14h42 12h41 10h39
Our opinion on the climate in September
The review of Where And When favourable weather favourable weather fair weather
Activities and events

What to do in Alkmaar in September?

Best activities in September
Cultural visits and heritageNightlifeGastronomy
Possible activities in September
Family and attractionsNature and landscapes
Observed weather

What was the weather like in Alkmaar in September last?

Find the observed weather calendar in Alkmaar in September 2025, with each day’s weather, temperatures and precipitation.

Mon. Tue. Wed. Thu. Fri. Sat. Sun.
1
Partly Cloudy
15°C22°C0.4 mm
2
Patchy rain nearby
14°C22°C0.9 mm
3
Overcast
16°C23°C1.8 mm
4
Patchy rain nearby
16°C22°C0.2 mm
5
Clear/Sunny
14°C20°C0.1 mm
6
Clear/Sunny
12°C23°C0.0 mm
7
Clear/Sunny
15°C28°C0.1 mm
8
Clear/Sunny
18°C22°C0.3 mm
9
Patchy light drizzle
13°C17°C0.9 mm
10
Clear/Sunny
10°C22°C0.0 mm
11
Light rain shower
16°C19°C1.6 mm
12
Patchy rain nearby
12°C17°C4.0 mm
13
Moderate rain at times
11°C15°C4.4 mm
14
Patchy rain nearby
12°C18°C0.6 mm
15
Clear/Sunny
16°C18°C1.5 mm
16
Light rain shower
14°C15°C2.9 mm
17
Light rain shower
14°C17°C1.7 mm
18
Patchy rain nearby
17°C20°C0.1 mm
19
Clear/Sunny
16°C25°C0.0 mm
20
Patchy rain nearby
18°C22°C0.3 mm
21
Patchy rain nearby
14°C18°C0.1 mm
22
Patchy rain nearby
10°C14°C0.3 mm
23
Light rain shower
9°C15°C0.5 mm
24
Partly Cloudy
9°C16°C0.0 mm
25
Clear/Sunny
10°C17°C0.0 mm
26
Clear/Sunny
11°C17°C0.0 mm
27
Partly Cloudy
10°C17°C0.0 mm
28
Clear/Sunny
10°C19°C0.0 mm
29
Patchy rain nearby
12°C18°C0.4 mm
30
Patchy rain nearby
11°C17°C0.2 mm
Nearby

Where to go near Alkmaar in September?

Compare cities and destinations near Alkmaar in September to find another travel stop, a nearby alternative or a logical continuation of your stay in Alkmaar.

Loading...
Every month

Best time to visit Alkmaar month by month

Compare the weather in Alkmaar across all months of the year and open each detailed page to find the best time.

Frequently asked questions

Travel to to Alkmaar in September: your frequently asked questions

Short answers to the questions we ask ourselves before booking for this month.

Yes, it’s a good time. Conditions are favorable in Alkmaar in September, which places this month 5th out of 12.

Expect an average of 18°C during the day and 14°C at night, with about 109 mm of precipitation spread over 7 rainy days.

The sea is only 18°C on average in September. Swimming is still possible, but it will be cool.

Expect about 10.3 hours of sunshine per day on average for this month.

This month is particularly suited to these activities: Cultural visits and heritage, Nightlife and Gastronomy. These are the ones for which the conditions on site are most favourable.

Visitor numbers are moderate: this month is in High crowding, with an index of 68/100. It is often a good compromise between weather and tranquility.

The most favorable months in Alkmaar are: May, June, July, August and September. You are therefore already in one of the best times of the year; shifting your plans would not gain you much in terms of weather.
Top
Switch to imperial units?

Temperatures are shown in degrees Celsius and precipitation in millimetres. Based on your country of connection, °F and inches may be more familiar to you.