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September Weather in Monaghan, Ireland

Last updated: August 23, 2025

In Monaghan, Ireland, the average temperature in September hovers around 13°C (55°F), with a minimum of 1°C (33°F) and a maximum reaching up to 24°C (75°F). Expect 74 mm (2.9 in) of precipitation spread over 15 days, contributing to an average humidity level of 88%. Be prepared for a mix of cool and warm days, perfect for cozy indoor activities or adventurous outings!

September Temperature in Monaghan

In September in Monaghan, the average temperature is 13°C (55°F). The maximum can reach 24°C (75°F) and the minimum can be as low as 1°C (33°F). This makes it a great time for travelers to enjoy mild weather while exploring the sights.

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

The chart illustrates September temperature patterns in Monaghan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Monaghan, September typically has an average temperature of 13°C (55°F), with highs reaching up to 24°C (75°F) and lows dropping to around 1°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec414243475257605955504543
Data source: Temperature data for Monaghan 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 Monaghan

In Monaghan in September, the precipitation amount is 74 mm (2.9 in) over the course of 15 days.

September Precipitation Trends in Monaghan

The chart displays monthly precipitation patterns in Monaghan, 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 Monaghan, September typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec6497875170888212674878793
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Monaghan

In Monaghan in September humidity is 88%. With an average temperature of 13°C (55°F), this humidity feels like a damp chill that clings to your skin, making it essential to dress in layers while exploring, as the moisture in the air can lead to a rather uncomfortable experience for traveling.

September Average Humidity in Monaghan

This chart illustrates the average monthly humidity levels in Monaghan, 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 Monaghan is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%86%85%82%84%86%86%88%89%90%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Monaghan

In Monaghan 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 Monaghan.

Maximum UV Index Levels in Monaghan for September

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

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

This table compares monthly weather conditions in Monaghan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)64 mm (2.5 inches)87%low
February Weather6°C (42°F)97 mm (3.8 inches)86%low
March Weather6°C (44°F)87 mm (3.4 inches)86%moderate
April Weather8°C (47°F)51 mm (2.0 inches)85%moderate
May Weather11°C (52°F)70 mm (2.8 inches)82%high
June Weather14°C (57°F)88 mm (3.5 inches)84%very high
July Weather15°C (60°F)82 mm (3.2 inches)86%very high
August Weather15°C (59°F)126 mm (5.0 inches)86%high
September Weather13°C (55°F)74 mm (2.9 inches)88%moderate
October Weather10°C (50°F)87 mm (3.4 inches)89%moderate
November Weather7°C (45°F)86 mm (3.4 inches)90%low
December Weather6°C (43°F)93 mm (3.7 inches)86%low

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