Bornholm Island Weather in September
September in Bornholm Island sees daytime temperatures around 18°C (64°F) and lows of 14°C (57°F) at night. With around 76 mm (3 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Bornholm Island in September
Typically around 14 days of rainfall are expected, averaging 76 mm (3 in) for the month. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.
Temperature in Bornholm Island in September
In September, expect moderate temperatures in Bornholm Island, with highs of 18°C (64°F) and lows of 14°C (57°F) at night. This month falls in the summer season. A light jacket or extra layer can be useful, especially outside the warmest hours 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 Bornholm Island in September
The month experiences a moderate amount of sunlight, with 158 hours of sunshine. This provides a nice balance between sunshine and clouds.If you prefer enjoying temperate temperatures and rain-free days, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Denmark, check out our Bornholm Island's climate page.
Bornholm Island Temperature in September
Min Temperature
14°C (57°F)
Max Temperature
18°C (64°F)
Chance of Rain
48%
Precipitation
76 mm (3 in)
Rainy days
14 days
Sunshine
158 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Bornholm Island typically drop from around 18°C (64°F) at the start of September to approximately 15°C (59°F) by the end. Nights are cool, with lows typically ranging from 10°C (50°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 Bornholm Island in September
Browse day-by-day weather records for Bornholm Island spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Bornholm Island historical weather extremes in September
The extremes listed below come from historical weather data collected in Bornholm Island from 1976 through 2025.
- The warmest day in September was on September 4, 2024, with a maximum of 27°C (81°F).
- Bornholm Island experienced its chilliest September day on September 16, 1993, reaching only 11°C (52°F).
- Bornholm Island registered its coldest September night on September 30, 1979, with temperatures dropping to 1°C (34°F).
Best Places in Denmark in September
Find out more about the weather in Denmark and which places have the best travel conditions in this month. See all of Denmark in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Bornholm Island 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 Bornholm Island 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 Denmark, check out our Bornholm Island's climate page.
See the full Bornholm Island climate overview or explore weather in Denmark.
