Neptun Weather in September
With daytime temperatures of 24°C (75°F) and nighttime lows of 17°C (63°F), September in Neptun brings high temperatures during the day. The perfect weather makes it an appealing time to visit.
Rainfall in Neptun in September
Typically around 5 days of rainfall are expected, averaging 57 mm (2.2 in) for the month. When rain does fall this month, it tends to come down hard. The low number of rain days makes each shower more significant.
Temperature in Neptun in September
September tends to be one of the perfect months in Neptun, with 24°C (75°F) in the afternoon and 17°C (63°F) overnight. Overall, the month follows a fairly predictable daily temperature pattern. With overnight lows of 17°C (63°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Neptun in September
With approximately 228 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.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 Romania, check out our Neptun's climate page.
Neptun Temperature in September
Min Temperature
17°C (63°F)
Max Temperature
24°C (75°F)
Chance of Rain
17%
Precipitation
57 mm (2.2 in)
Rainy days
5 days
Humidity
79% *
Sunshine
228 hours *
Percentage Sunshine
*
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Neptun typically drop from around 25°C (77°F) at the start of September to approximately 21°C (70°F) by the end. Nights are cool, with lows typically ranging from 12°C (54°F) to 16°C (61°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 Neptun in September
Browse day-by-day weather records for Neptun spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Neptun historical weather extremes in September
Based on weather observations in Neptun between 1997 and 2025, these are the recorded extremes during September.
- The warmest day in September was on September 15, 2022, with a maximum of 35°C (95°F).
- On September 24, 2000, Neptun saw its coldest September day with temperatures maxing out at 12°C (54°F).
- Nighttime temperatures dropped to 4°C (39°F) on September 28, 1997, marking the coldest September night on record.
Best Places in Romania in September
Find out more about the weather in Romania and which places have the best travel conditions in this month. See all of Romania in September →
perfect weather
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tolerable
unpleasant
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What to Wear in Neptun in September
For Neptun in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Neptun 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 Romania, check out our Neptun's climate page.
Temperature Rainfall Sunshine Humidity
See the full Neptun climate overview or explore weather in Romania.
