September Weather in Big River, United States

Last updated: June 24, 2025

In Big River, United States, the average temperature in September is a warm 32°C (90°F). While you can enjoy sunny days, be prepared for a temperature range that can drop to 14°C (58°F) and soar up to a scorching 48°C (118°F). Expect minimal rainfall, with an average precipitation amount of just 8 mm (0.3 in) over 1 day. The climate is characterized by a comfortable average humidity of 48%, making it an inviting destination for those who love warm weather!

September Temperature in Big River

In September in Big River, the average temperature is 32°C (90°F). Maximum temperatures can reach as high as 48°C (118°F), while the minimum can drop to as low as 14°C (58°F). Travelers should be prepared for hot days and cooler nights when visiting.

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

The chart illustrates September temperature patterns in Big River, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Big River, September typically has an average temperature of 32°C (90°F), with highs reaching up to 48°C (118°F) and lows dropping to around 14°C (58°F).

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

September Precipitation in Big River

In Big River in September, the precipitation amount is 8 mm (0.3 in) over the course of 1 day.

September Precipitation Trends in Big River

The chart displays monthly precipitation patterns in Big 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 Big River, September typically receives around 8 mm (0.3 inches) of precipitation spread over approximately 1 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 Big River

In Big River in September, humidity is 48%. With an average temperature of 32°C (90°F), this humidity feels like a warm embrace, creating an environment that is both refreshing yet slightly sticky, perfect for leisurely strolls but requiring plenty of hydration while traveling.

September Average Humidity in Big River

This chart illustrates the average monthly humidity levels in Big 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 Big River is approximately 48%, 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 Big River

In Big River in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Big River.

Maximum UV Index Levels in Big River for September

The chart shows the monthly maximum UV Index (UVI) for Big 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 Big River typically reaches 10, which falls under the very high exposure category.

Data source: Big 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 Big River Compares to Other Months

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

This table compares monthly weather conditions in Big River, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (55°F)	16 mm (0.6 inches)	77%	moderate
February Weather	15°C (59°F)	16 mm (0.6 inches)	80%	high
March Weather	19°C (66°F)	20 mm (0.8 inches)	68%	very high
April Weather	24°C (76°F)	2 mm (0.1 inches)	58%	very high
May Weather	28°C (82°F)	1 mm (0.1 inches)	45%	extreme
June Weather	34°C (93°F)	1 mm (0.0 inches)	31%	extreme
July Weather	37°C (98°F)	10 mm (0.4 inches)	27%	extreme
August Weather	36°C (98°F)	8 mm (0.3 inches)	30%	extreme
September Weather	32°C (90°F)	8 mm (0.3 inches)	48%	very high
October Weather	24°C (75°F)	11 mm (0.4 inches)	59%	high
November Weather	18°C (64°F)	18 mm (0.7 inches)	70%	moderate
December Weather	12°C (54°F)	11 mm (0.4 inches)	77%	moderate