September Weather in Fahan, Ireland

Last updated: August 23, 2025

In Fahan, Ireland, the average temperature in September hovers around 13°C (55°F), with a minimum of 3°C (37°F) and a comfortable maximum of 25°C (77°F). Be prepared for some rainfall, as the area sees about 97 mm (3.8 in) of precipitation spread over 16 days. With an average humidity of 87%, you can expect a moist atmosphere that enhances the region's charm.

September Temperature in Fahan

In September in Fahan, the average temperature is 13°C (55°F). Maximum temperatures can reach 25°C (77°F), while minimums can dip as low as 3°C (37°F). Overall, it's a great time to explore Fahan, so be sure to pack layers to stay comfortable!

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

The chart illustrates September temperature patterns in Fahan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fahan, September typically has an average temperature of 13°C (55°F), with highs reaching up to 25°C (77°F) and lows dropping to around 3°C (37°F).

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

September Precipitation in Fahan

In Fahan in September, the total precipitation amount is 97 mm (3.8 in) over the course of 16 days.

September Precipitation Trends in Fahan

The chart displays monthly precipitation patterns in Fahan, 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 Fahan, September typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 16 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Fahan

In Fahan 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 Fahan

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

In Fahan 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 Fahan.

Maximum UV Index Levels in Fahan for September

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

Data source: Fahan 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 Fahan Compares to Other Months

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

This table compares monthly weather conditions in Fahan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	72 mm (2.8 inches)	84%	low
February Weather	6°C (42°F)	113 mm (4.4 inches)	84%	low
March Weather	6°C (44°F)	106 mm (4.2 inches)	83%	moderate
April Weather	8°C (47°F)	64 mm (2.5 inches)	84%	moderate
May Weather	11°C (52°F)	93 mm (3.7 inches)	83%	high
June Weather	13°C (56°F)	107 mm (4.2 inches)	83%	very high
July Weather	15°C (59°F)	99 mm (3.9 inches)	86%	very high
August Weather	15°C (58°F)	157 mm (6.2 inches)	86%	high
September Weather	13°C (55°F)	97 mm (3.8 inches)	87%	moderate
October Weather	10°C (50°F)	112 mm (4.4 inches)	87%	moderate
November Weather	7°C (46°F)	94 mm (3.7 inches)	88%	low
December Weather	6°C (43°F)	103 mm (4.1 inches)	84%	low