nomadseason

September Weather in Belmullet, Ireland

Last updated: August 23, 2025

The average temperature in Belmullet, Ireland during September is a mild 14°C (57°F). Expect a minimum of 8°C (47°F) and a maximum of 20°C (69°F). During this period, precipitation averages 109 mm (4.3 in) across approximately 20 days, resulting in an average humidity of 86%.

September Temperature in Belmullet

In September in Belmullet, the average temperature is 14°C (57°F). The maximum can reach 20°C (69°F), while the minimum can drop as low as 8°C (47°F). This mild climate makes Belmullet an ideal destination for travelers seeking comfortable weather during this time of year.

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

The chart illustrates September temperature patterns in Belmullet, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Belmullet, September typically has an average temperature of 14°C (57°F), with highs reaching up to 20°C (69°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec464546485255585957534947
Data source: Temperature data for Belmullet generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Belmullet

In Belmullet in September, the total precipitation amount is 109 mm (4.3 in) spread over 20 days.

September Precipitation Trends in Belmullet

The chart displays monthly precipitation patterns in Belmullet, 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 Belmullet, September typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec10713911564718892146109160148147
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Belmullet

In Belmullet in September humidity is 86%. With an average temperature of 14°C (57°F), this humidity feels like a heavy blanket enveloping you, making travel feel oppressive and uncomfortably sticky.

September Average Humidity in Belmullet

This chart illustrates the average monthly humidity levels in Belmullet, 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 Belmullet is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%80%79%81%86%85%87%87%86%83%81%78%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Belmullet

In Belmullet 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 Belmullet.

Maximum UV Index Levels in Belmullet for September

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

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

This table compares monthly weather conditions in Belmullet, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)107 mm (4.2 inches)79%low
February Weather7°C (45°F)139 mm (5.5 inches)79%low
March Weather8°C (46°F)115 mm (4.5 inches)79%moderate
April Weather9°C (49°F)64 mm (2.5 inches)81%moderate
May Weather11°C (52°F)71 mm (2.8 inches)86%high
June Weather13°C (55°F)88 mm (3.5 inches)85%very high
July Weather14°C (58°F)92 mm (3.6 inches)87%very high
August Weather15°C (59°F)146 mm (5.7 inches)86%high
September Weather14°C (57°F)109 mm (4.3 inches)86%moderate
October Weather12°C (53°F)160 mm (6.3 inches)83%moderate
November Weather9°C (49°F)148 mm (5.8 inches)81%low
December Weather8°C (47°F)147 mm (5.8 inches)78%low

Compare Belmullet's Climate with Cities Worldwide