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September Weather in Holycross, Ireland

Last updated: August 23, 2025

In September, the average temperature in Holycross, Ireland hovers around 13°C (56°F). Expect a minimum of 1°C (35°F) and a maximum of 25°C (78°F). During this time, the region experiences about 64 mm (2.5 in) of precipitation spread over 13 days, with an average humidity of 88%.

September Temperature in Holycross

In September in Holycross, the average temperature is 13°C (56°F), with maximums reaching 25°C (78°F) and minimums dropping to as low as 1°C (35°F). Be prepared for a range of temperatures while traveling, as you may experience both mild and chilly weather.

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

The chart illustrates September temperature patterns in Holycross, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Holycross, 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 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec424343475257605955504543
Data source: Temperature data for Holycross 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 Holycross

In Holycross in September, the precipitation amount is 64 mm (2.5 in) spread over 13 days.

September Precipitation Trends in Holycross

The chart displays monthly precipitation patterns in Holycross, 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 Holycross, September typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec56100875763677195648984107
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Holycross

In Holycross 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 Holycross

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

In Holycross 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 Holycross.

Maximum UV Index Levels in Holycross for September

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

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

This table compares monthly weather conditions in Holycross, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)56 mm (2.2 inches)88%low
February Weather6°C (43°F)100 mm (3.9 inches)88%low
March Weather6°C (44°F)87 mm (3.4 inches)87%moderate
April Weather8°C (47°F)57 mm (2.2 inches)86%moderate
May Weather11°C (52°F)63 mm (2.5 inches)83%high
June Weather14°C (57°F)67 mm (2.6 inches)83%very high
July Weather16°C (60°F)71 mm (2.8 inches)85%very high
August Weather15°C (59°F)95 mm (3.7 inches)85%high
September Weather13°C (56°F)64 mm (2.5 inches)88%moderate
October Weather10°C (50°F)89 mm (3.5 inches)91%moderate
November Weather7°C (45°F)84 mm (3.3 inches)92%low
December Weather6°C (43°F)107 mm (4.2 inches)89%low

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