September Weather in Cook, United States

Last updated: June 24, 2025

In September, the average temperature in Cook, United States hovers around 14°C (57°F), with a range from a chilly -2°C (28°F) to a balmy 30°C (86°F). Expect about 117 mm (4.6 in) of precipitation spread over 13 days, while the air maintains a notable average humidity of 77%. Prepare for a varied climate that blends cool breezes with occasional warmth!

September Temperature in Cook

In September in Cook, the average temperature is 14°C (57°F). Maximum temperatures can reach up to 30°C (86°F), while minimum temperatures can dip as low as -2°C (28°F). Be prepared for a range of weather conditions to ensure a comfortable travel experience.

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

The chart illustrates September temperature patterns in Cook, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cook, September typically has an average temperature of 14°C (57°F), with highs reaching up to 30°C (86°F) and lows dropping to around -2°C (28°F).

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

September Precipitation in Cook

In Cook in September, the total precipitation amount is 117 mm (4.6 in) spread over 13 days.

September Precipitation Trends in Cook

The chart displays monthly precipitation patterns in Cook, 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 Cook, September typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 13 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 Cook

In Cook in September, humidity is 77%. With an average temperature of 14°C (57°F), this humidity feels like a heavy blanket wrapping around you, making outdoor exploration feel muggy and leaving you craving the shade while you travel.

September Average Humidity in Cook

This chart illustrates the average monthly humidity levels in Cook, 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 Cook 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 Cook

In Cook 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 Cook.

Maximum UV Index Levels in Cook for September

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

Data source: Cook 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 Cook Compares to Other Months

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

This table compares monthly weather conditions in Cook, 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 (9°F)	23 mm (0.9 inches)	92%	low
February Weather	-13°C (9°F)	28 mm (1.1 inches)	93%	moderate
March Weather	-3°C (26°F)	32 mm (1.2 inches)	88%	moderate
April Weather	3°C (38°F)	59 mm (2.3 inches)	83%	high
May Weather	12°C (54°F)	63 mm (2.5 inches)	76%	very high
June Weather	18°C (65°F)	86 mm (3.4 inches)	76%	very high
July Weather	21°C (69°F)	88 mm (3.5 inches)	76%	very high
August Weather	19°C (66°F)	73 mm (2.9 inches)	77%	very high
September Weather	14°C (57°F)	117 mm (4.6 inches)	77%	high
October Weather	6°C (43°F)	90 mm (3.6 inches)	82%	moderate
November Weather	-3°C (26°F)	38 mm (1.5 inches)	87%	moderate
December Weather	-9°C (16°F)	52 mm (2.0 inches)	89%	low