September Weather in Brooklin, United States

Last updated: June 24, 2025

In Brooklin, United States, the average temperature in September hovers around 15°C (60°F), with a minimum of 9°C (49°F) and a comfortable maximum of 21°C (70°F). This month also brings about 104 mm (4.1 in) of precipitation spread over 9 days, resulting in an average humidity of 77%. Be prepared for a cozy, sometimes rainy, atmosphere!

September Temperature in Brooklin

In September, in Brooklin, the average temperature is 15°C (60°F). The maximum can reach 21°C (70°F), and the minimum can be as low as 9°C (49°F). This mild climate makes it a perfect time for outdoor exploration and enjoying the local scenery.

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

The chart illustrates September temperature patterns in Brooklin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brooklin, September typically has an average temperature of 15°C (60°F), with highs reaching up to 21°C (70°F) and lows dropping to around 9°C (49°F).

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

September Precipitation in Brooklin

In Brooklin in September, the precipitation amount is 104 mm (4.1 in) over the course of 9 days.

September Precipitation Trends in Brooklin

The chart displays monthly precipitation patterns in Brooklin, 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 Brooklin, September typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 9 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 Brooklin

In Brooklin in September, humidity is 77%. With an average temperature of 15°C (60°F), this humidity feels like you're wading through a warm, heavy blanket, making travel feel more exhausting and sticky than usual.

September Average Humidity in Brooklin

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

In Brooklin 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 Brooklin.

Maximum UV Index Levels in Brooklin for September

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

Data source: Brooklin 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 Brooklin Compares to Other Months

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

This table compares monthly weather conditions in Brooklin, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	109 mm (4.3 inches)	88%	low
February Weather	-1°C (30°F)	104 mm (4.1 inches)	88%	moderate
March Weather	1°C (33°F)	82 mm (3.2 inches)	85%	moderate
April Weather	5°C (41°F)	148 mm (5.8 inches)	81%	high
May Weather	9°C (48°F)	102 mm (4.0 inches)	76%	very high
June Weather	13°C (55°F)	90 mm (3.5 inches)	74%	very high
July Weather	16°C (60°F)	86 mm (3.4 inches)	74%	very high
August Weather	17°C (63°F)	85 mm (3.3 inches)	74%	very high
September Weather	15°C (60°F)	104 mm (4.1 inches)	77%	high
October Weather	12°C (54°F)	128 mm (5.1 inches)	82%	moderate
November Weather	6°C (44°F)	137 mm (5.4 inches)	85%	moderate
December Weather	1°C (34°F)	153 mm (6.0 inches)	84%	low