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September Weather in Mallow, Ireland

Last updated: August 23, 2025

In September, the average temperature in Mallow, Ireland hovers around 13°C (56°F), with a minimum dip to 0°C (32°F) and a pleasant maximum reaching 25°C (78°F). Expect 76 mm (3.0 in) of precipitation spread across 14 days, contributing to an average humidity level of 88%, making it a notably damp month.

September Temperature in Mallow

In September in Mallow, the average temperature is 13°C (56°F). Maximum temperatures can reach 25°C (78°F), while minimum temperatures can drop as low as 0°C (32°F). It's a great time to explore Mallow, as the mild weather is perfect for outdoor activities and sightseeing.

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

The chart illustrates September temperature patterns in Mallow, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mallow, September typically has an average temperature of 13°C (56°F), with highs reaching up to 25°C (78°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec424343475257605955504644
Data source: Temperature data for Mallow 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 Mallow

In Mallow in September, the precipitation amount is 76 mm (3.0 in) spread over 14 days.

September Precipitation Trends in Mallow

The chart displays monthly precipitation patterns in Mallow, 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 Mallow, September typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec621049267736469104769682109
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mallow

In Mallow in September, humidity is 88%. With an average temperature of 13°C (56°F), this humidity feels like a thick, warm blanket wrapping around you, making outdoor adventures sticky and challenging.

September Average Humidity in Mallow

This chart illustrates the average monthly humidity levels in Mallow, 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 Mallow is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%86%83%83%85%85%88%91%92%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mallow

In Mallow 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 Mallow.

Maximum UV Index Levels in Mallow for September

The chart shows the monthly maximum UV Index (UVI) for Mallow 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 Mallow typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Mallow 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 Mallow Compares to Other Months

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

This table compares monthly weather conditions in Mallow, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)62 mm (2.4 inches)88%low
February Weather6°C (43°F)104 mm (4.1 inches)88%low
March Weather6°C (44°F)92 mm (3.6 inches)87%moderate
April Weather8°C (47°F)67 mm (2.6 inches)86%moderate
May Weather11°C (52°F)73 mm (2.9 inches)83%high
June Weather14°C (57°F)64 mm (2.5 inches)83%very high
July Weather16°C (60°F)69 mm (2.7 inches)85%very high
August Weather15°C (59°F)104 mm (4.1 inches)85%high
September Weather13°C (56°F)76 mm (3.0 inches)88%moderate
October Weather10°C (51°F)96 mm (3.8 inches)91%moderate
November Weather8°C (46°F)82 mm (3.2 inches)92%low
December Weather7°C (44°F)109 mm (4.3 inches)89%low

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