September Weather in Derrybeg, Ireland

Last updated: August 23, 2025

In September, the average temperature in Derrybeg, Ireland is a mild 13°C (56°F), with daytime highs reaching up to 21°C (70°F) and nighttime lows dipping to around 7°C (45°F). Prepare for a damp month, as Derrybeg experiences about 148 mm (5.8 in) of precipitation across 21 days, paired with an average humidity of 87%.

September Temperature in Derrybeg

In September in Derrybeg, the average temperature is 13°C (56°F). Maximum can reach 21°C (70°F), and the minimum can be as low as 7°C (45°F). This mild climate makes it a great time for travelers to explore and enjoy outdoor activities.

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

The chart illustrates September temperature patterns in Derrybeg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Derrybeg, September typically has an average temperature of 13°C (56°F), with highs reaching up to 21°C (70°F) and lows dropping to around 7°C (45°F).

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

September Precipitation in Derrybeg

In Derrybeg in September, the total precipitation amount is 148 mm (5.8 in) spread over 21 days.

September Precipitation Trends in Derrybeg

The chart displays monthly precipitation patterns in Derrybeg, 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 Derrybeg, September typically receives around 148 mm (5.8 inches) of precipitation spread over approximately 21 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 Derrybeg

In Derrybeg in September humidity is 87%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket wrapping around you, making it challenging to explore comfortably.

September Average Humidity in Derrybeg

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

In Derrybeg 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 Derrybeg.

Maximum UV Index Levels in Derrybeg for September

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

Data source: Derrybeg 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 Derrybeg Compares to Other Months

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

This table compares monthly weather conditions in Derrybeg, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (44°F)	128 mm (5.1 inches)	84%	low
February Weather	6°C (44°F)	158 mm (6.2 inches)	84%	low
March Weather	7°C (44°F)	137 mm (5.4 inches)	83%	moderate
April Weather	8°C (47°F)	64 mm (2.5 inches)	84%	moderate
May Weather	11°C (51°F)	84 mm (3.3 inches)	83%	high
June Weather	13°C (55°F)	112 mm (4.4 inches)	83%	very high
July Weather	14°C (58°F)	118 mm (4.6 inches)	86%	very high
August Weather	14°C (58°F)	177 mm (7.0 inches)	86%	high
September Weather	13°C (56°F)	148 mm (5.8 inches)	87%	moderate
October Weather	11°C (52°F)	197 mm (7.8 inches)	87%	moderate
November Weather	9°C (48°F)	156 mm (6.1 inches)	88%	low
December Weather	7°C (46°F)	191 mm (7.5 inches)	84%	low