Harlingen Weather in September

September in Harlingen brings pleasant temperatures around 18°C (64°F) during the day, dropping to 14°C (57°F) at night, with quite a bit of rainfall expected, averaging around 107 mm (4.2 in) for the month.

Rainfall in Harlingen in September

You can expect rain on roughly 17 days based on historical data, averaging 107 mm (4.2 in) for the month. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.

Temperature in Harlingen in September

If you're visiting Harlingen in September, expect highs of 18°C (64°F) and overnight lows around 14°C (57°F). September is in the summer season. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights cool down to 14°C (57°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Harlingen in September

The area experiences a moderate amount of sunshine, with approximately 154 hours of sunlight expected. This means a decent mix of sun and overcast.

Wind Speed in Harlingen in September

Average wind conditions reach 5 m/s (10 knots) in September. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.

If your ideal day consists of dry skies and pleasant temperatures, July typically offers the best circumstances for Harlingen.

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• January
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• October
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For a detailed overview over the year and the best time to visit the Netherlands, check out our Harlingen's climate page.

Harlingen Temperature in September

Min Temperature 14°C (57°F)  

Max Temperature 18°C (64°F)  

Chance of Rain 56%  

Precipitation 107 mm (4.2 in)  

Rainy days 17 days  

Humidity 86% *  

Windspeed 5 m/s (10 knots) *  

Sunshine 154 hours *  

Percentage Sunshine 41% *  

* Data from: Leeuwaren, the Netherlands (23 KM, 14 Miles).

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Harlingen typically stay consistent throughout September, with daily highs averaging around 18°C (64°F). Nights are cool, with lows typically ranging from 10°C (50°F) to 13°C (55°F).

Average temperatures in September

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Historical weather for Harlingen in September

Browse day-by-day weather records for Harlingen spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Harlingen historical weather extremes in September

The extremes listed below come from historical weather data collected in Harlingen from 1976 through 2025.

• The hottest September day on record in Harlingen reached 30°C (86°F) (September 13, 2016).
• The coldest September day was on September 28, 1995, with a maximum of 11°C (52°F).
• Nighttime temperatures dropped to 4°C (39°F) on September 12, 1986, marking the coldest September night on record.
• The wettest September day on record brought 56 mm (2.2 in) of precipitation to Harlingen (September 15, 1994).

What to Wear in Harlingen in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Harlingen in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

9/10

Walking

9/10

Camping

6/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the Netherlands, check out our Harlingen's climate page.

More climate data for Harlingen

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Harlingen climate overview or explore weather in the Netherlands.