Assen Weather in September
Assen in September sees pleasant daytime temperatures of 20°C (68°F) and nighttime lows of 11°C (52°F). Rainfall is fairly high this month at around 78 mm (3.1 in), so pack a rain jacket to stay dry.
Rainfall in Assen in September
Historically, the month has about 17 days of rain, averaging 78 mm (3.1 in) in total. With rain spread across many days but low totals, showers are typically short and light rather than heavy.
Temperature in Assen in September
Assen has perfect weather in September, with days reaching 20°C (68°F) and nights cooling to 11°C (52°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. With overnight lows of 11°C (52°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Assen in September
The month experiences a moderate amount of sunlight, with 127 hours of sunshine. This provides a nice balance between sunshine and clouds.
Wind Speed in Assen in September
Wind speeds average 3 m/s (6 knots) during September. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the Netherlands, check out our Assen's climate page.
Assen Temperature in September
Min Temperature
11°C (52°F)
Max Temperature
20°C (68°F)
Chance of Rain
56%
Precipitation
78 mm (3.1 in)
Rainy days
17 days
Humidity
85%
Windspeed
3 m/s (6 knots)
Sunshine
127 hours
Percentage Sunshine
33%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Assen typically stay consistent throughout September, with daily highs averaging around 20°C (68°F). Nights are cool, with lows typically ranging from 9°C (48°F) to 12°C (54°F).
Average temperatures in September
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
Historical weather for Assen in September
Browse day-by-day weather records for Assen spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Assen historical weather extremes in September
The extremes listed below come from historical weather data collected in Assen from 1976 through 2025.
- The hottest September day on record in Assen reached 30°C (86°F) (September 13, 2016).
- The lowest daytime temperature in September was 11°C (52°F), recorded on September 30, 1995.
- Assen registered its coldest September night on September 13, 1986, with temperatures dropping to 1°C (34°F).
Best Places in the Netherlands in September
Find out more about the weather in the Netherlands and which places have the best travel conditions in this month. See all of the Netherlands in September →
perfect weather
pleasant
tolerable
unpleasant
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What to Wear in Assen 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. Rain gear is recommended, you can expect wet weather on multiple days. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Assen in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the Netherlands, check out our Assen's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Assen climate overview or explore weather in the Netherlands.
