September Weather in Reserve, United States

Last updated: June 24, 2025

In September, the average temperature in Reserve, United States is a pleasant 18°C (64°F), with a minimum dipping to 3°C (37°F) and a maximum reaching 32°C (90°F). Expect 30 mm (1.2 in) of precipitation over approximately 5 days, and enjoy a comfortable average humidity of 66%.

September Temperature in Reserve

In September in Reserve, the average temperature is 18°C (64°F), with maximums reaching 32°C (90°F) and minimums dropping as low as 3°C (37°F). This diverse temperature range makes it a great time for travelers to prepare for both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Reserve, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Reserve, September typically has an average temperature of 18°C (64°F), with highs reaching up to 32°C (90°F) and lows dropping to around 3°C (37°F).

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

September Precipitation in Reserve

In Reserve in September, the precipitation amount is 30 mm (1.2 in) over the course of 5 days.

September Precipitation Trends in Reserve

The chart displays monthly precipitation patterns in Reserve, 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 Reserve, September typically receives around 30 mm (1.2 inches) of precipitation spread over approximately 5 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 Reserve

In Reserve in September humidity is 66%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace that can make outdoor activities slightly uncomfortable if you aren't properly hydrated. Travelers might find themselves longing for shade and refreshing drinks as they explore, but the pleasant temperatures still allow for enjoyable adventures with the right precautions.

September Average Humidity in Reserve

This chart illustrates the average monthly humidity levels in Reserve, 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 Reserve is approximately 66%, 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 Reserve

In Reserve in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Reserve.

Maximum UV Index Levels in Reserve for September

The chart shows the monthly maximum UV Index (UVI) for Reserve 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 Reserve typically reaches 11, which falls under the extreme exposure category.

Data source: Reserve 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 Reserve Compares to Other Months

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

This table compares monthly weather conditions in Reserve, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (34°F)	26 mm (1.0 inches)	81%	moderate
February Weather	3°C (37°F)	35 mm (1.4 inches)	82%	high
March Weather	6°C (44°F)	29 mm (1.1 inches)	68%	very high
April Weather	11°C (52°F)	12 mm (0.5 inches)	55%	extreme
May Weather	15°C (60°F)	13 mm (0.5 inches)	45%	extreme
June Weather	21°C (70°F)	13 mm (0.5 inches)	37%	extreme
July Weather	21°C (70°F)	77 mm (3.0 inches)	43%	extreme
August Weather	20°C (68°F)	43 mm (1.7 inches)	53%	extreme
September Weather	18°C (64°F)	30 mm (1.2 inches)	66%	extreme
October Weather	12°C (54°F)	15 mm (0.6 inches)	72%	very high
November Weather	7°C (45°F)	19 mm (0.7 inches)	81%	high
December Weather	2°C (36°F)	23 mm (0.9 inches)	84%	moderate