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September Weather in Valleymount, Ireland

Last updated: August 23, 2025

In September, the average temperature in Valleymount, Ireland is a mild 13°C (55°F), with temperatures fluctuating between a minimum of 1°C (34°F) and a maximum of 24°C (76°F). Expect some rain, as 74 mm (2.9 in) of precipitation typically falls over 13 days, complemented by an average humidity level of 86%.

September Temperature in Valleymount

In September in Valleymount, the average temperature is 13°C (55°F). Maximums can reach 24°C (76°F), while minimums can drop as low as 1°C (34°F). This makes Valleymount a great destination for travelers looking to experience mild weather with a chance of cooler evenings.

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

The chart illustrates September temperature patterns in Valleymount, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Valleymount, September typically has an average temperature of 13°C (55°F), with highs reaching up to 24°C (76°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec414243465257605955504542
Data source: Temperature data for Valleymount 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 Valleymount

In Valleymount in September, the precipitation amount is 74 mm (2.9 in) over the course of 13 days.

September Precipitation Trends in Valleymount

The chart displays monthly precipitation patterns in Valleymount, 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 Valleymount, September typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec58918657797680103749099103
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Valleymount

In Valleymount in September humidity is 86%. With an average temperature of 13°C (55°F), this humidity feels like a damp blanket clinging to your skin, making travel quite uncomfortable and urging you to seek cooler, dryer spots.

September Average Humidity in Valleymount

This chart illustrates the average monthly humidity levels in Valleymount, 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 Valleymount is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%86%85%83%85%86%85%86%87%87%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Valleymount

In Valleymount 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 Valleymount.

Maximum UV Index Levels in Valleymount for September

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

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

This table compares monthly weather conditions in Valleymount, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)58 mm (2.3 inches)85%low
February Weather5°C (42°F)91 mm (3.6 inches)86%low
March Weather6°C (43°F)86 mm (3.4 inches)86%moderate
April Weather8°C (47°F)57 mm (2.2 inches)85%moderate
May Weather11°C (52°F)79 mm (3.1 inches)83%high
June Weather14°C (57°F)76 mm (3.0 inches)85%very high
July Weather16°C (60°F)80 mm (3.1 inches)86%very high
August Weather15°C (59°F)103 mm (4.1 inches)85%high
September Weather13°C (55°F)74 mm (2.9 inches)86%moderate
October Weather10°C (50°F)90 mm (3.5 inches)87%moderate
November Weather7°C (45°F)99 mm (3.9 inches)86%low
December Weather6°C (43°F)103 mm (4.1 inches)84%low

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