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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Slovenia, check out our Novo Mesto's climate page.
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
*
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 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 2025.
- Novo Mesto recorded its highest September temperature of 32°C (90°F) on September 15, 2021.
- 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 →
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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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Slovenia, check out our Novo Mesto's climate page.
Temperature Rainfall Sunshine Humidity
See the full Novo Mesto climate overview or explore weather in Slovenia.
