September Weather in White River, United States

Last updated: June 24, 2025

In September, the average temperature in White River, United States is a pleasant 19°C (66°F). However, don't be surprised by the temperature range, which can dip to a cool 2°C (36°F) and soar up to a sizzling 39°C (102°F). During this time, expect to see about 57 mm (2.3 in) of precipitation spread over 6 days, contributing to an average humidity level of 72%.

September Temperature in White River

In September in White River, the average temperature is 19°C (66°F). Maximum can reach 39°C (102°F) and minimum can be as low as 2°C (36°F). Be prepared for a range of temperatures, making it ideal for layering your clothing for any activities you have planned.

September Weather in White River: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in White River, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In White River, September typically has an average temperature of 19°C (66°F), with highs reaching up to 39°C (102°F) and lows dropping to around 2°C (36°F).

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

September Precipitation in White River

In White River in September, the total precipitation amount is 57 mm (2.3 in), occurring over a span of 6 days.

September Precipitation Trends in White River

The chart displays monthly precipitation patterns in White River, 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 White River, September typically receives around 57 mm (2.3 inches) of precipitation spread over approximately 6 days.

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

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Millimeters (mm) Inches (in)

September Humidity in White River

In White River in September, humidity is 72%. With an average temperature of 19°C (66°F), this humidity feels like a warm embrace that can make even the lightest activities feel strenuous for traveling.

September Average Humidity in White River

This chart illustrates the average monthly humidity levels in White River, 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 White River is approximately 72%, 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 White River

In White River in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in White River.

Maximum UV Index Levels in White River for September

The chart shows the monthly maximum UV Index (UVI) for White River 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 White River typically reaches 8, which falls under the very high exposure category.

Data source: White River 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 White River Compares to Other Months

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

This table compares monthly weather conditions in White River, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (24°F)	20 mm (0.8 inches)	74%	moderate
February Weather	-6°C (22°F)	21 mm (0.8 inches)	79%	moderate
March Weather	2°C (36°F)	57 mm (2.2 inches)	65%	high
April Weather	7°C (44°F)	62 mm (2.4 inches)	69%	very high
May Weather	14°C (57°F)	109 mm (4.3 inches)	75%	very high
June Weather	22°C (72°F)	56 mm (2.2 inches)	84%	very high
July Weather	25°C (77°F)	74 mm (2.9 inches)	84%	very high
August Weather	23°C (73°F)	52 mm (2.0 inches)	83%	very high
September Weather	19°C (66°F)	57 mm (2.3 inches)	72%	very high
October Weather	9°C (48°F)	52 mm (2.1 inches)	68%	moderate
November Weather	3°C (38°F)	14 mm (0.6 inches)	75%	moderate
December Weather	-2°C (29°F)	32 mm (1.2 inches)	73%	low