September Weather in Big Lake, United States

Last updated: June 24, 2025

In Big Lake, United States, the average temperature in September hovers around 10°C (51°F). Expect chilly nights with a minimum temperature dipping as low as -6°C (22°F), while daytime highs can reach a pleasant 21°C (71°F). With 110 mm (4.3 in) of precipitation spread over 17 days, you'll want to keep an umbrella handy. The atmosphere is notably humid, with an average humidity of 97%, creating a uniquely crisp experience.

September Temperature in Big Lake

In September in Big Lake, the average temperature is 10°C (51°F). The maximum can reach 21°C (71°F), while the minimum can drop as low as -6°C (22°F). This makes it a great time to explore Big Lake, but be prepared for varied weather conditions.

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

The chart illustrates September temperature patterns in Big Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Big Lake, September typically has an average temperature of 10°C (51°F), with highs reaching up to 21°C (71°F) and lows dropping to around -6°C (22°F).

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

September Precipitation in Big Lake

In Big Lake in September, the precipitation amount is 110 mm (4.3 in) spread over 17 days.

September Precipitation Trends in Big Lake

The chart displays monthly precipitation patterns in Big Lake, 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 Lake, September typically receives around 110 mm (4.3 inches) of precipitation spread over approximately 17 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 Lake

In Big Lake in September, humidity is 97%. With an average temperature of 10°C (51°F), this humidity feels like a damp blanket enveloping you, making travel slow and uncomfortable as you navigate the thick, heavy air.

September Average Humidity in Big Lake

This chart illustrates the average monthly humidity levels in Big Lake, 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 Lake is approximately 97%, 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 Lake

In Big Lake in September, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Big Lake for better planning.

Maximum UV Index Levels in Big Lake for September

The chart shows the monthly maximum UV Index (UVI) for Big Lake 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 Lake typically reaches 4, which falls under the moderate exposure category.

Data source: Big Lake 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 Lake Compares to Other Months

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

This table compares monthly weather conditions in Big Lake, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-11°C (12°F)	44 mm (1.7 inches)	95%	low
February Weather	-8°C (18°F)	49 mm (1.9 inches)	95%	low
March Weather	-5°C (24°F)	42 mm (1.6 inches)	90%	moderate
April Weather	3°C (38°F)	37 mm (1.5 inches)	82%	moderate
May Weather	10°C (51°F)	58 mm (2.3 inches)	85%	moderate
June Weather	15°C (58°F)	54 mm (2.1 inches)	95%	high
July Weather	17°C (63°F)	72 mm (2.8 inches)	100%	high
August Weather	15°C (59°F)	120 mm (4.7 inches)	99%	moderate
September Weather	10°C (51°F)	110 mm (4.3 inches)	97%	moderate
October Weather	4°C (39°F)	122 mm (4.8 inches)	93%	low
November Weather	-5°C (23°F)	80 mm (3.1 inches)	97%	low
December Weather	-7°C (20°F)	86 mm (3.4 inches)	98%	low