September Weather in Polk, United States

Last updated: June 24, 2025

In September, the average temperature in Polk, United States is a pleasant 18°C (65°F). Expect a range that dips to a minimum of 3°C (38°F) and soars to a maximum of 32°C (91°F). During this month, you can anticipate about 115 mm (4.5 in) of precipitation spread over 10 days, contributing to an average humidity level of 77%. Enjoy the unique climate of Polk this September!

September Temperature in Polk

In September in Polk, the average temperature is 18°C (65°F). Maximums can reach 32°C (91°F) and minimums can be as low as 3°C (38°F). It's a great time for travelers to enjoy a mix of warm days and cooler nights, making it ideal for outdoor activities and sightseeing.

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

The chart illustrates September temperature patterns in Polk, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Polk, September typically has an average temperature of 18°C (65°F), with highs reaching up to 32°C (91°F) and lows dropping to around 3°C (38°F).

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

September Precipitation in Polk

In Polk in September, the precipitation amount is 115 mm (4.5 in) over a span of 10 days.

September Precipitation Trends in Polk

The chart displays monthly precipitation patterns in Polk, 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 Polk, September typically receives around 115 mm (4.5 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 Polk

In Polk in September humidity is 77%. With an average temperature of 18°C (65°F), this humidity feels like a warm embrace that's both refreshing and slightly stifling, making it essential for travelers to stay hydrated and take frequent breaks to enjoy the vibrant surroundings without feeling overly fatigued.

September Average Humidity in Polk

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

In Polk in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Polk.

Maximum UV Index Levels in Polk for September

The chart shows the monthly maximum UV Index (UVI) for Polk 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 Polk typically reaches 8, which falls under the very high exposure category.

Data source: Polk 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 Polk Compares to Other Months

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

This table compares monthly weather conditions in Polk, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (28°F)	103 mm (4.1 inches)	88%	moderate
February Weather	0°C (31°F)	115 mm (4.5 inches)	88%	moderate
March Weather	3°C (38°F)	110 mm (4.3 inches)	87%	high
April Weather	9°C (48°F)	144 mm (5.7 inches)	87%	very high
May Weather	15°C (60°F)	156 mm (6.1 inches)	81%	very high
June Weather	20°C (68°F)	144 mm (5.7 inches)	83%	very high
July Weather	22°C (73°F)	147 mm (5.8 inches)	82%	very high
August Weather	21°C (71°F)	107 mm (4.2 inches)	76%	very high
September Weather	18°C (65°F)	115 mm (4.5 inches)	77%	very high
October Weather	13°C (55°F)	129 mm (5.1 inches)	82%	high
November Weather	4°C (40°F)	109 mm (4.3 inches)	89%	moderate
December Weather	1°C (34°F)	107 mm (4.2 inches)	86%	low