September Weather in Twin Valley, United States

Last updated: June 24, 2025

The average temperature in Twin Valley, United States during September is a comfortable 15°C (60°F). However, temperatures can vary significantly, with a minimum of -3°C (27°F) and a maximum soaring to 31°C (89°F). Expect an average precipitation amount of 92 mm (3.6 in) spread over about 10 days, contributing to an average humidity level of 77%.

September Temperature in Twin Valley

In September in Twin Valley, the average temperature is 15°C (60°F). The maximum can reach 31°C (89°F) and the minimum can be as low as -3°C (27°F). This weather makes Twin Valley an ideal destination for travelers looking to experience a wide range of temperatures, so be sure to pack accordingly!

September Weather in Twin Valley: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Twin Valley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Twin Valley, September typically has an average temperature of 15°C (60°F), with highs reaching up to 31°C (89°F) and lows dropping to around -3°C (27°F).

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

September Precipitation in Twin Valley

In Twin Valley in September, the total precipitation amount is 92 mm (3.6 in), which falls over the course of 10 days.

September Precipitation Trends in Twin Valley

The chart displays monthly precipitation patterns in Twin Valley, 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 Twin Valley, September typically receives around 92 mm (3.6 inches) of precipitation spread over approximately 10 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 Twin Valley

In Twin Valley in September, humidity is 77%. With an average temperature of 15°C (60°F), this humidity feels like you're wading through a warm, heavy blanket, making travel feel more exhausting and sticky than usual.

September Average Humidity in Twin Valley

This chart illustrates the average monthly humidity levels in Twin Valley, 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 Twin Valley is approximately 77%, 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 Twin Valley

In Twin Valley 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 Twin Valley.

Maximum UV Index Levels in Twin Valley for September

The chart shows the monthly maximum UV Index (UVI) for Twin Valley 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 Twin Valley typically reaches 7, which falls under the high exposure category.

Data source: Twin Valley 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 Twin Valley Compares to Other Months

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

This table compares monthly weather conditions in Twin Valley, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-12°C (10°F)	20 mm (0.8 inches)	90%	low
February Weather	-13°C (9°F)	22 mm (0.9 inches)	92%	moderate
March Weather	-2°C (28°F)	26 mm (1.0 inches)	85%	moderate
April Weather	4°C (39°F)	51 mm (2.0 inches)	81%	high
May Weather	13°C (56°F)	49 mm (1.9 inches)	75%	very high
June Weather	21°C (69°F)	80 mm (3.1 inches)	79%	very high
July Weather	22°C (72°F)	70 mm (2.8 inches)	76%	very high
August Weather	20°C (68°F)	92 mm (3.6 inches)	78%	very high
September Weather	15°C (60°F)	92 mm (3.6 inches)	77%	high
October Weather	6°C (44°F)	83 mm (3.3 inches)	79%	moderate
November Weather	-2°C (28°F)	24 mm (1.0 inches)	86%	moderate
December Weather	-8°C (17°F)	42 mm (1.7 inches)	86%	low