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September Weather in Leitrim, Ireland

Last updated: August 23, 2025

In September, the average temperature in Leitrim, Ireland hovers around 13°C (55°F), with lows of 2°C (36°F) and highs reaching up to 24°C (76°F). Expect about 89 mm (3.5 in) of precipitation spread over 17 days, contributing to a high average humidity of 88%. Be prepared for a mix of mild temperatures and wet weather!

September Temperature in Leitrim

In September in Leitrim, the average temperature is 13°C (55°F). Maximum temperatures can reach 24°C (76°F), while minimums can drop as low as 2°C (36°F). This makes it a great time to explore Leitrim, so be sure to pack layers to enjoy the varied weather!

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

The chart illustrates September temperature patterns in Leitrim, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Leitrim, 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 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec414243475257595855504543
Data source: Temperature data for Leitrim 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 Leitrim

In Leitrim in September, the total precipitation amount is 89 mm (3.5 in), occurring over the course of 17 days.

September Precipitation Trends in Leitrim

The chart displays monthly precipitation patterns in Leitrim, 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 Leitrim, September typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec8012610762821069714790113106110
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Leitrim

In Leitrim 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 Leitrim

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

In Leitrim 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 Leitrim.

Maximum UV Index Levels in Leitrim for September

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

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

This table compares monthly weather conditions in Leitrim, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)80 mm (3.1 inches)88%low
February Weather6°C (42°F)126 mm (5.0 inches)88%low
March Weather6°C (44°F)107 mm (4.2 inches)87%moderate
April Weather8°C (47°F)62 mm (2.4 inches)86%moderate
May Weather11°C (53°F)82 mm (3.2 inches)83%high
June Weather14°C (57°F)106 mm (4.2 inches)83%very high
July Weather15°C (60°F)97 mm (3.8 inches)85%very high
August Weather15°C (59°F)147 mm (5.8 inches)85%high
September Weather13°C (55°F)89 mm (3.5 inches)88%moderate
October Weather10°C (50°F)113 mm (4.4 inches)91%moderate
November Weather7°C (45°F)106 mm (4.2 inches)92%low
December Weather6°C (43°F)110 mm (4.3 inches)89%low

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