Go to Bovec in Slovenia
With mountains that linger in the blue sky, an emerald-green river Bovec offers picturesque scenes that are a must see for your bucket list.
Novo Mesto Weather in September
September in Novo Mesto brings pleasant temperatures around 22°C (72°F) during the day, dropping to 11°C (52°F) at night, with the most rainfall of the year.
Rainfall in Novo Mesto in September
Expect frequent showers this month, so make sure to have an umbrella to keep yourself dry. Historically, September sees about 13 days of rain, with a monthly average of 129 mm (5.1 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Novo Mesto in September
Novo Mesto in September gets highs of 22°C (72°F) during the day and drops to 11°C (52°F) at night. Even when the weather is stable, mornings and evenings can still feel distinctly cool. At 11°C (52°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Novo Mesto in September
The area enjoys a balanced 182 hours of sunlight, ensuring it's neither too overcast nor too sunny.If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.
Novo Mesto Temperature in September
Min Temperature
11°C (52°F)
Max Temperature
22°C (72°F)
Chance of Rain
43%
Precipitation
129 mm (5.1 in)
Rainy days
13 days
Humidity
72% *
Sunshine
182 hours *
Percentage Sunshine
*
* Data from: Ljubljana, Slovenia (58 KM, 36 Miles).
Novo Mesto Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Novo Mesto - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Novo Mesto typically drop from around 23°C (73°F) at the start of September to approximately 20°C (68°F) by the end. Nights are cool, with lows typically ranging from 9°C (48°F) to 13°C (55°F).
Average temperatures in September
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Novo Mesto in September
Browse day-by-day weather records for Novo Mesto spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Novo Mesto historical weather extremes in September
The extremes listed below come from historical weather data collected in Novo Mesto from 1992 through 2026.
- Novo Mesto recorded its highest September temperature of 34°C (93°F) on September 8, 2026.
- On September 30, 2013, Novo Mesto saw its coldest September day with temperatures maxing out at 9°C (48°F).
- The coldest night in September in Novo Mesto was on September 30, 1995, with a minimum of 0°C (32°F).
Best Places in Slovenia in September
Find out more about the weather in Slovenia and which places have the best travel conditions in this month. See all of Slovenia in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Novo Mesto 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. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
What To Do in Novo Mesto in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming6/10 -
Cycling9/10 -
Walking9/10 -
Camping6/10 -
Outdoor sports9/10
Novo Mesto 3-Day Forecast
More climate data for Novo Mesto
Temperature Rainfall Sunshine Humidity
See the full Novo Mesto climate overview or explore weather in Slovenia.
Popular in September
Where to go in September - average daytime high across popular destinations.
Piran
24°C (75°F) Portorož24°C (75°F) Maribor
21°C (70°F) Ljubljana21°C (70°F) Bled19°C (66°F) Bovec19°C (66°F) Bohinj19°C (66°F) Kranjska Gora18°C (64°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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