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September Weather in Ballybofey, Ireland

Last updated: August 23, 2025

In September, the average temperature in Ballybofey, Ireland hovers around 12°C (55°F), with a minimum dipping to 1°C (35°F) and a maximum reaching 24°C (75°F). You'll likely experience 97 mm (3.8 in) of precipitation spread over 19 days, contributing to a notable average humidity of 87%. Be prepared for a mix of weather as you enjoy your time in this unique locale!

September Temperature in Ballybofey

In September in Ballybofey, the average temperature is 12°C (55°F). Maximums can reach 24°C (75°F) and minimums can be as low as 1°C (35°F). It's a delightful time to explore Ballybofey, so be sure to pack layers to accommodate the varying temperatures.

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

The chart illustrates September temperature patterns in Ballybofey, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ballybofey, September typically has an average temperature of 12°C (55°F), with highs reaching up to 24°C (75°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec414143465155585854504543
Data source: Temperature data for Ballybofey generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Ballybofey

In Ballybofey in September, the precipitation amount is 97 mm (3.8 in) spread over the course of 19 days.

September Precipitation Trends in Ballybofey

The chart displays monthly precipitation patterns in Ballybofey, 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 Ballybofey, September typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec8512811160771039914297120106120
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Ballybofey

In Ballybofey in September humidity is 87%. With an average temperature of 12°C (55°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities less enjoyable and requiring extra layers for comfort while traveling.

September Average Humidity in Ballybofey

This chart illustrates the average monthly humidity levels in Ballybofey, 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 Ballybofey is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%83%84%83%84%86%86%87%87%88%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ballybofey

In Ballybofey 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 Ballybofey.

Maximum UV Index Levels in Ballybofey for September

The chart shows the monthly maximum UV Index (UVI) for Ballybofey 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 Ballybofey typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Ballybofey 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 Ballybofey Compares to Other Months

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

This table compares monthly weather conditions in Ballybofey, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)84 mm (3.3 inches)84%low
February Weather5°C (42°F)128 mm (5.0 inches)84%low
March Weather6°C (43°F)111 mm (4.4 inches)83%moderate
April Weather8°C (47°F)60 mm (2.4 inches)84%moderate
May Weather11°C (52°F)77 mm (3.0 inches)83%high
June Weather13°C (56°F)103 mm (4.1 inches)83%very high
July Weather15°C (59°F)99 mm (3.9 inches)86%very high
August Weather14°C (58°F)142 mm (5.6 inches)86%high
September Weather12°C (55°F)97 mm (3.8 inches)87%moderate
October Weather10°C (50°F)120 mm (4.7 inches)87%moderate
November Weather7°C (45°F)106 mm (4.2 inches)88%low
December Weather6°C (43°F)120 mm (4.7 inches)84%low

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