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September Weather in Longford, Ireland

Last updated: August 23, 2025

In September, the average temperature in Longford, Ireland hovers around 13°C (56°F), with temperatures ranging from a chilly 2°C (36°F) to a warm 25°C (78°F). Expect about 77 mm (3.0 in) of precipitation spread over 14 days, contributing to an average humidity of 88%. Whether you're planning outdoor adventures or cozy indoors, pack accordingly for a diverse climate!

September Temperature in Longford

In September in Longford, the average temperature is 13°C (56°F). Maximums can reach 25°C (78°F), and minimums can be as low as 2°C (36°F). This mild climate makes Longford an ideal destination for travelers seeking comfortable temperatures and outdoor activities during their visit.

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

The chart illustrates September temperature patterns in Longford, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Longford, 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 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec424344485357605956504543
Data source: Temperature data for Longford 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 Longford

In Longford in September, the precipitation amount is 77 mm (3.0 in) over the course of 14 days.

September Precipitation Trends in Longford

The chart displays monthly precipitation patterns in Longford, 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 Longford, September typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec66107915575888513177939396
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Longford

In Longford 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 Longford

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

In Longford 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 Longford.

Maximum UV Index Levels in Longford for September

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

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

This table compares monthly weather conditions in Longford, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)66 mm (2.6 inches)88%low
February Weather6°C (43°F)107 mm (4.2 inches)88%low
March Weather7°C (44°F)91 mm (3.6 inches)87%moderate
April Weather9°C (48°F)55 mm (2.2 inches)86%moderate
May Weather12°C (53°F)75 mm (2.9 inches)83%high
June Weather14°C (58°F)88 mm (3.5 inches)83%very high
July Weather16°C (61°F)85 mm (3.4 inches)85%very high
August Weather15°C (59°F)131 mm (5.2 inches)85%high
September Weather13°C (56°F)77 mm (3.0 inches)88%moderate
October Weather10°C (51°F)93 mm (3.7 inches)91%moderate
November Weather7°C (46°F)93 mm (3.7 inches)92%low
December Weather6°C (43°F)96 mm (3.8 inches)89%low

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