September Weather in Nelson, United States

Last updated: June 24, 2025

In September, the average temperature in Nelson, United States hovers around 22°C (72°F), with comfortable highs reaching up to 33°C (92°F) and cool lows potentially dropping to 9°C (48°F). This month witnesses an average precipitation of 121 mm (4.8 in) spread over 10 days, contributing to a relatively high humidity level of 76%.

September Temperature in Nelson

In September in Nelson, the average temperature is 22°C (72°F). Maximums can reach 33°C (92°F), while minimums can be as low as 9°C (48°F). It’s a great time for travelers to enjoy a mix of warm days and cooler nights.

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

The chart illustrates September temperature patterns in Nelson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nelson, September typically has an average temperature of 22°C (72°F), with highs reaching up to 33°C (92°F) and lows dropping to around 9°C (48°F).

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

September Precipitation in Nelson

In Nelson in September, the precipitation amount is 121 mm (4.8 in) spread over a period of 10 days.

September Precipitation Trends in Nelson

The chart displays monthly precipitation patterns in Nelson, 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 Nelson, September typically receives around 121 mm (4.8 inches) of precipitation spread over approximately 10 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 Nelson

In Nelson in September humidity is 76%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, making travel slightly uncomfortable as you navigate through the thick, saturated air.

September Average Humidity in Nelson

This chart illustrates the average monthly humidity levels in Nelson, 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 Nelson is approximately 76%, 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 Nelson

In Nelson in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Nelson.

Maximum UV Index Levels in Nelson for September

The chart shows the monthly maximum UV Index (UVI) for Nelson 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 Nelson typically reaches 9, which falls under the very high exposure category.

Data source: Nelson 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 Nelson Compares to Other Months

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

This table compares monthly weather conditions in Nelson, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	133 mm (5.2 inches)	86%	moderate
February Weather	9°C (48°F)	203 mm (8.0 inches)	86%	high
March Weather	12°C (53°F)	167 mm (6.6 inches)	86%	very high
April Weather	15°C (60°F)	150 mm (5.9 inches)	82%	very high
May Weather	20°C (68°F)	132 mm (5.2 inches)	85%	extreme
June Weather	23°C (73°F)	141 mm (5.6 inches)	85%	extreme
July Weather	25°C (77°F)	128 mm (5.1 inches)	83%	extreme
August Weather	24°C (76°F)	161 mm (6.3 inches)	76%	very high
September Weather	22°C (72°F)	121 mm (4.8 inches)	76%	very high
October Weather	17°C (63°F)	164 mm (6.5 inches)	80%	very high
November Weather	10°C (50°F)	96 mm (3.8 inches)	88%	high
December Weather	7°C (46°F)	162 mm (6.4 inches)	88%	moderate