September Weather in Rolleston, New Zealand

Last updated: August 31, 2025

In September, the average temperature in Rolleston, New Zealand hovers around 10°C (50°F). Prepare for a range of weather, as temperatures can dip to a chilly -2°C (28°F) or rise to a warm 23°C (73°F). Expect 53 mm (2.1 in) of precipitation spread over about 9 days, with humidity levels averaging a moist 85%.

September Temperature in Rolleston

In September in Rolleston, the average temperature is 10°C (50°F). Maximums can reach 23°C (73°F), while minimums can drop to as low as -2°C (28°F). This varied climate makes it essential for travelers to pack layers to adjust to shifting temperatures throughout the day.

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

The chart illustrates September temperature patterns in Rolleston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rolleston, September typically has an average temperature of 10°C (50°F), with highs reaching up to 23°C (73°F) and lows dropping to around -2°C (28°F).

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

September Precipitation in Rolleston

In Rolleston in September, the total precipitation amount is 53 mm (2.1 in) spread over 9 days.

September Precipitation Trends in Rolleston

The chart displays monthly precipitation patterns in Rolleston, 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 Rolleston, September typically receives around 53 mm (2.1 inches) of precipitation spread over approximately 9 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 Rolleston

In Rolleston in September, humidity is 85%. With an average temperature of 10°C (50°F), this humidity feels like a heavy, damp blanket surrounding you, making travel feel sluggish and uncomfortable as you navigate through the thick, moist air.

September Average Humidity in Rolleston

This chart illustrates the average monthly humidity levels in Rolleston, 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 Rolleston is approximately 85%, 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 Rolleston

In Rolleston in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Rolleston.

Maximum UV Index Levels in Rolleston for September

The chart shows the monthly maximum UV Index (UVI) for Rolleston 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 Rolleston typically reaches 5, which falls under the moderate exposure category.

Data source: Rolleston 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 Rolleston Compares to Other Months

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

This table compares monthly weather conditions in Rolleston, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	18°C (64°F)	48 mm (1.9 inches)	81%	extreme
February Weather	18°C (64°F)	40 mm (1.6 inches)	79%	extreme
March Weather	16°C (60°F)	53 mm (2.1 inches)	81%	very high
April Weather	13°C (55°F)	69 mm (2.7 inches)	84%	high
May Weather	10°C (50°F)	56 mm (2.2 inches)	87%	moderate
June Weather	7°C (46°F)	61 mm (2.4 inches)	87%	low
July Weather	7°C (45°F)	72 mm (2.8 inches)	87%	low
August Weather	8°C (47°F)	50 mm (2.0 inches)	85%	moderate
September Weather	10°C (50°F)	53 mm (2.1 inches)	85%	moderate
October Weather	12°C (54°F)	63 mm (2.5 inches)	84%	very high
November Weather	15°C (58°F)	75 mm (2.9 inches)	82%	very high
December Weather	16°C (62°F)	77 mm (3.0 inches)	84%	extreme