September Weather in Neptun, Romania

Last updated: August 27, 2025

In September, the average temperature in Neptun, Romania is a pleasant 20°C (69°F). Expect a range from a cool 8°C (46°F) to a warm 31°C (88°F). During this month, anticipate about 16 mm (0.6 in) of precipitation over approximately 3 days, and enjoy an average humidity level of 63%.

September Temperature in Neptun

In September in Neptun, the average temperature is 20°C (69°F), with maximums reaching 31°C (88°F) and minimums dipping as low as 8°C (46°F). This range makes it a comfortable time to visit Neptun, perfect for outdoor activities and exploration.

September Weather in Neptun: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Neptun, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Neptun, September typically has an average temperature of 20°C (69°F), with highs reaching up to 31°C (88°F) and lows dropping to around 8°C (46°F).

Data source: Temperature data for Neptun generated using information from the Copernicus Climate Change Service.

September Precipitation in Neptun

In Neptun in September, the precipitation amount is 16 mm (0.6 in), spread over a duration of 3 days.

September Precipitation Trends in Neptun

The chart displays monthly precipitation patterns in Neptun, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Neptun, September typically receives around 16 mm (0.6 inches) of precipitation spread over approximately 3 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Neptun

In Neptun in September, humidity is 63%. With an average temperature of 20°C (69°F), this humidity feels like a warm embrace, making travel comfortable yet slightly muggy, ideal for leisurely strolls but potentially tiring during midday explorations.

September Average Humidity in Neptun

This chart illustrates the average monthly humidity levels in Neptun, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Neptun is approximately 63%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Neptun

In Neptun in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Neptun.

Maximum UV Index Levels in Neptun for September

The chart shows the monthly maximum UV Index (UVI) for Neptun in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Neptun typically reaches 7, which falls under the high exposure category.

Data source: Neptun September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Neptun Compares to Other Months

Weather in Neptun varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Neptun, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Neptun, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (37°F)	53 mm (2.1 inches)	84%	low
February Weather	5°C (41°F)	37 mm (1.4 inches)	81%	moderate
March Weather	7°C (44°F)	46 mm (1.8 inches)	79%	high
April Weather	10°C (51°F)	30 mm (1.2 inches)	75%	high
May Weather	16°C (62°F)	40 mm (1.6 inches)	77%	very high
June Weather	22°C (71°F)	87 mm (3.4 inches)	71%	very high
July Weather	24°C (75°F)	63 mm (2.5 inches)	69%	very high
August Weather	24°C (76°F)	12 mm (0.5 inches)	60%	very high
September Weather	20°C (69°F)	16 mm (0.6 inches)	63%	high
October Weather	15°C (59°F)	50 mm (2.0 inches)	76%	moderate
November Weather	10°C (50°F)	44 mm (1.7 inches)	81%	moderate
December Weather	6°C (43°F)	60 mm (2.3 inches)	84%	low