Knokke-Heist Weather in September
September in Knokke-Heist sees daytime temperatures around 20°C (68°F) and lows of 14°C (57°F) at night. With around 78 mm (3.1 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Knokke-Heist in September
You can expect rain on roughly 15 days based on historical data, averaging 78 mm (3.1 in) for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Knokke-Heist in September
The perfect temperature in Knokke-Heist in September makes it a solid month to visit, with 20°C (68°F) during the day and 14°C (57°F) at night. The summer season is characteristic of September. Conditions are often most pleasant around the middle of the day. With lows of 14°C (57°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.
Sunshine in Knokke-Heist in September
The area experiences a moderate amount of sunshine, with approximately 153 hours of sunlight expected. This means a decent mix of sun and overcast.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 Belgium, check out our Knokke-Heist's climate page.
Knokke-Heist Temperature in September
Min Temperature
14°C (57°F)
Max Temperature
20°C (68°F)
Chance of Rain
50%
Precipitation
78 mm (3.1 in)
Rainy days
15 days
Sunshine
153 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Knokke-Heist typically stay consistent throughout September, with daily highs averaging around 20°C (68°F). Nights are cool, with lows typically ranging from 12°C (54°F) to 14°C (57°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 Knokke-Heist in September
Browse day-by-day weather records for Knokke-Heist spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Knokke-Heist historical weather extremes in September
The extremes listed below come from historical weather data collected in Knokke-Heist from 1976 through 2025.
- The hottest September day on record in Knokke-Heist reached 30°C (86°F) (September 10, 2023).
- On September 22, 1984, Knokke-Heist saw its coldest September day with temperatures maxing out at 11°C (52°F).
- The coldest night in September in Knokke-Heist was on September 26, 2018, with a minimum of 6°C (43°F).
- The wettest day in September Knokke-Heist was on September 20, 1993 with 32 mm (1.3 in) of precipitation.
Best Places in Belgium in September
Find out more about the weather in Belgium and which places have the best travel conditions in this month. See all of Belgium in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Knokke-Heist 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 Knokke-Heist 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 Belgium, check out our Knokke-Heist's climate page.
See the full Knokke-Heist climate overview or explore weather in Belgium.
