September Weather in Collooney, Ireland

Last updated: August 23, 2025

In Collooney, Ireland, the average temperature in September hovers around 13°C (55°F). Expect a minimum of 2°C (36°F) and a maximum of 24°C (76°F), providing a pleasant range for outdoor activities. However, be prepared for some rain, as 106 mm (4.2 in) of precipitation may fall over 18 days. With an average humidity of 87%, it's advisable to stay hydrated and enjoy the lush surroundings!

September Temperature in Collooney

In September in Collooney, the average temperature is 13°C (55°F). Maximum temperatures can reach 24°C (76°F), while minimums can drop as low as 2°C (36°F). This makes it a great time to explore Collooney, so be sure to pack layers to enjoy the varied weather!

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

The chart illustrates September temperature patterns in Collooney, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Collooney, September typically has an average temperature of 13°C (55°F), with highs reaching up to 24°C (76°F) and lows dropping to around 2°C (36°F).

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

September Precipitation in Collooney

In Collooney in September, the precipitation amount is 106 mm (4.2 in), occurring over 18 days.

September Precipitation Trends in Collooney

The chart displays monthly precipitation patterns in Collooney, 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 Collooney, September typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 18 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 Collooney

In Collooney in September, humidity is 87%. With an average temperature of 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making travel sluggish and slightly uncomfortable, as each step seems to cling to the damp air.

September Average Humidity in Collooney

This chart illustrates the average monthly humidity levels in Collooney, 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 Collooney is approximately 87%, 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 Collooney

In Collooney in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Collooney.

Maximum UV Index Levels in Collooney for September

The chart shows the monthly maximum UV Index (UVI) for Collooney 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 Collooney typically reaches 5, which falls under the moderate exposure category.

Data source: Collooney 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 Collooney Compares to Other Months

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

This table compares monthly weather conditions in Collooney, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (42°F)	88 mm (3.4 inches)	84%	low
February Weather	6°C (43°F)	131 mm (5.2 inches)	84%	low
March Weather	6°C (44°F)	119 mm (4.7 inches)	83%	moderate
April Weather	9°C (48°F)	65 mm (2.6 inches)	84%	moderate
May Weather	11°C (53°F)	86 mm (3.4 inches)	83%	high
June Weather	13°C (57°F)	117 mm (4.6 inches)	83%	very high
July Weather	15°C (59°F)	109 mm (4.3 inches)	86%	very high
August Weather	15°C (59°F)	158 mm (6.2 inches)	86%	high
September Weather	13°C (55°F)	106 mm (4.2 inches)	87%	moderate
October Weather	10°C (51°F)	131 mm (5.2 inches)	87%	moderate
November Weather	8°C (46°F)	115 mm (4.5 inches)	88%	low
December Weather	6°C (44°F)	119 mm (4.7 inches)	84%	low