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September Weather in Callan, Ireland

Last updated: August 23, 2025

In Callan, Ireland, the average temperature in September hovers around 13°C (56°F), making it a mild time of year. Expect temperatures to range from a chilly 0°C (32°F) to a warm 25°C (77°F). With 60 mm (2.4 in) of precipitation spread over 12 days, a touch of rain is likely, while humidity levels remain high at 88%. Be prepared for a cozy, yet damp atmosphere!

September Temperature in Callan

In September in Callan, the average temperature is 13°C (56°F), with maximums reaching 25°C (77°F) and minimums dropping as low as 0°C (32°F). It's a diverse climate, making it an ideal time for travelers to enjoy both warm days and cool evenings.

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

The chart illustrates September temperature patterns in Callan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Callan, September typically has an average temperature of 13°C (56°F), with highs reaching up to 25°C (77°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec424344475257615956504543
Data source: Temperature data for Callan 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 Callan

In Callan in September, the precipitation amount is 60 mm (2.4 in) over a span of 12 days.

September Precipitation Trends in Callan

The chart displays monthly precipitation patterns in Callan, 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 Callan, September typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec4994826367646393608687104
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Callan

In Callan 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 Callan

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

In Callan 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 Callan.

Maximum UV Index Levels in Callan for September

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

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

This table compares monthly weather conditions in Callan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)49 mm (1.9 inches)88%low
February Weather6°C (43°F)94 mm (3.7 inches)88%low
March Weather6°C (44°F)82 mm (3.2 inches)87%moderate
April Weather8°C (47°F)63 mm (2.5 inches)86%moderate
May Weather11°C (52°F)67 mm (2.6 inches)83%high
June Weather14°C (58°F)64 mm (2.5 inches)83%very high
July Weather16°C (61°F)63 mm (2.5 inches)85%very high
August Weather15°C (59°F)93 mm (3.7 inches)85%high
September Weather13°C (56°F)60 mm (2.4 inches)88%moderate
October Weather10°C (51°F)86 mm (3.4 inches)91%moderate
November Weather7°C (46°F)87 mm (3.4 inches)92%low
December Weather6°C (44°F)104 mm (4.1 inches)89%low

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