September Weather in Windermere, United States

Last updated: June 24, 2025

In September, the average temperature in Windermere, United States is a warm 27°C (81°F). Expect a comfortable minimum of 18°C (66°F) and the potential for heat with a maximum reaching 34°C (94°F). Rainfall during this month averages 184 mm (7.3 in) across approximately 20 days, creating a humid environment with an average humidity of 83%.

September Temperature in Windermere

In September in Windermere, the average temperature is 27°C (81°F). Maximums can reach 34°C (94°F), and minimums can be as low as 18°C (66°F). This makes it a perfect time for travelers seeking warm weather and outdoor adventures.

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

The chart illustrates September temperature patterns in Windermere, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Windermere, September typically has an average temperature of 27°C (81°F), with highs reaching up to 34°C (94°F) and lows dropping to around 18°C (66°F).

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

September Precipitation in Windermere

In Windermere in September, the total precipitation amount is 184 mm (7.3 in) spread over a period of 20 days.

September Precipitation Trends in Windermere

The chart displays monthly precipitation patterns in Windermere, 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 Windermere, September typically receives around 184 mm (7.3 inches) of precipitation spread over approximately 20 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 Windermere

In Windermere in September humidity is 83%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket enveloping you, making sightseeing and outdoor activities feel more exhausting and requiring frequent breaks to relax in the shade or cool off.

September Average Humidity in Windermere

This chart illustrates the average monthly humidity levels in Windermere, 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 Windermere is approximately 83%, 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 Windermere

In Windermere 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 Windermere.

Maximum UV Index Levels in Windermere for September

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

Data source: Windermere 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 Windermere Compares to Other Months

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

This table compares monthly weather conditions in Windermere, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (61°F)	41 mm (1.6 inches)	83%	moderate
February Weather	19°C (67°F)	51 mm (2.0 inches)	80%	very high
March Weather	20°C (69°F)	21 mm (0.8 inches)	75%	very high
April Weather	23°C (73°F)	75 mm (2.9 inches)	70%	extreme
May Weather	25°C (78°F)	102 mm (4.0 inches)	68%	extreme
June Weather	27°C (81°F)	214 mm (8.4 inches)	75%	extreme
July Weather	28°C (82°F)	234 mm (9.2 inches)	79%	extreme
August Weather	28°C (82°F)	234 mm (9.2 inches)	81%	extreme
September Weather	27°C (81°F)	184 mm (7.3 inches)	83%	extreme
October Weather	25°C (77°F)	91 mm (3.6 inches)	81%	very high
November Weather	20°C (69°F)	44 mm (1.7 inches)	82%	high
December Weather	17°C (64°F)	61 mm (2.4 inches)	84%	moderate