Kopstal Weather in September
September in Kopstal sees daytime temperatures around 20°C (68°F) and lows of 10°C (50°F) at night. With around 69 mm (2.7 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Kopstal in September
Rain is expected on roughly 13 days, totalling around 69 mm (2.7 in) for the month. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.
Temperature in Kopstal in September
September is a good time to be in Kopstal. Days are perfect, reaching 20°C (68°F), with nights around 10°C (50°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights fall to 10°C (50°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Kopstal in September
The area enjoys a moderate level of sunlight, with around 172 hours. It's a good balance between sunny and cloudy days.If your ideal day consists of dry skies and pleasant temperatures, June, July, August and September typically offer the best circumstances for Kopstal.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Luxembourg, check out our Kopstal's climate page.
Kopstal Temperature in September
Min Temperature
10°C (50°F)
Max Temperature
20°C (68°F)
Chance of Rain
45%
Precipitation
69 mm (2.7 in)
Rainy days
13 days
Humidity
76% *
Sunshine
172 hours *
Percentage Sunshine
42% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Kopstal typically drop from around 20°C (68°F) at the start of September to approximately 17°C (63°F) by the end. 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 Kopstal in September
Browse day-by-day weather records for Kopstal spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Kopstal historical weather extremes in September
The extremes listed below come from historical weather data collected in Kopstal from 1976 through 2025.
- The hottest September day on record in Kopstal reached 32°C (90°F) (September 15, 2020).
- On September 26, 2010, Kopstal saw its coldest September day with temperatures maxing out at 9°C (48°F).
- The lowest overnight temperature recorded in September was 2°C (36°F) (September 20, 1978).
Best Places in Luxembourg in September
Find out more about the weather in Luxembourg and which places have the best travel conditions in this month. See all of Luxembourg in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Kopstal 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. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Kopstal 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 Luxembourg, check out our Kopstal's climate page.
Temperature Rainfall Sunshine Humidity
See the full Kopstal climate overview or explore weather in Luxembourg.
