Last updated: August 23, 2025
In September, the average temperature in Killenard, Ireland is a pleasant 14°C (57°F). However, be prepared for fluctuations, as temperatures can dip to a chilly 0°C (33°F) or soar to a warm 26°C (80°F). Expect 71 mm (2.8 in) of precipitation over approximately 12 days, contributing to an average humidity of 86%. Whether you’re basking in the sun or caught in a drizzle, Killenard has its own unique charm during this month!
In September in Killenard, the average temperature is 14°C (57°F). Maximums can reach 26°C (80°F), and minimums can drop as low as 0°C (33°F). This variation makes it essential for travelers to pack both light layers for the warmth and warmer clothing for the cooler evenings.
In Killenard in September, the precipitation amount is 71 mm (2.8 in) during a total of 12 days.
In Killenard in September humidity is 86%. With an average temperature of 14°C (57°F), this humidity feels like a heavy blanket enveloping you, making travel feel oppressive and uncomfortably sticky.
In Killenard 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 Killenard.
UV Risk Categories
Weather in Killenard varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Killenard, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 6°C (43°F) | 55 mm (2.1 inches) | 85% | low |
| February Weather | 6°C (44°F) | 86 mm (3.4 inches) | 86% | low |
| March Weather | 7°C (45°F) | 82 mm (3.2 inches) | 86% | moderate |
| April Weather | 9°C (48°F) | 48 mm (1.9 inches) | 85% | moderate |
| May Weather | 12°C (53°F) | 72 mm (2.8 inches) | 83% | high |
| June Weather | 14°C (58°F) | 70 mm (2.7 inches) | 85% | very high |
| July Weather | 16°C (61°F) | 72 mm (2.8 inches) | 86% | very high |
| August Weather | 15°C (60°F) | 99 mm (3.9 inches) | 85% | high |
| September Weather | 14°C (57°F) | 71 mm (2.8 inches) | 86% | moderate |
| October Weather | 11°C (51°F) | 83 mm (3.3 inches) | 87% | moderate |
| November Weather | 8°C (46°F) | 83 mm (3.3 inches) | 86% | low |
| December Weather | 7°C (44°F) | 93 mm (3.7 inches) | 84% | low |