Last updated: August 23, 2025
In December, the average temperature in Newcastle West, Ireland hovers around 7°C (45°F). Expect a chilly range with minimums dipping to -3°C (27°F) and maximums reaching 14°C (58°F). Be prepared for wet weather, as precipitation averages 118 mm (4.7 in) over 17 days. With an average humidity of 89%, you'll definitely want to bundle up and stay cozy!
In December in Newcastle West, the average temperature is 7°C (45°F). Maximum temperatures can reach 14°C (58°F), while minimum temperatures can drop as low as -3°C (27°F). It's advisable to pack layers and prepare for a mix of cool and chilly weather during your travels.
In Newcastle West in December, the total precipitation amount reaches 118 mm (4.7 in) over the course of 17 days.
In Newcastle West in December, humidity is 89%. With an average temperature of 7°C (45°F), this humidity feels like stepping into a damp cloud, making traveling quite uncomfortable as the moisture clings to your skin and clothes, turning even mild activity into a sweaty ordeal.
In Newcastle West in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Newcastle West.
UV Risk Categories
Weather in Newcastle West varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Newcastle West, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 6°C (43°F) | 69 mm (2.7 inches) | 88% | low |
| February Weather | 7°C (44°F) | 113 mm (4.4 inches) | 88% | low |
| March Weather | 7°C (44°F) | 100 mm (3.9 inches) | 87% | moderate |
| April Weather | 9°C (48°F) | 60 mm (2.4 inches) | 86% | moderate |
| May Weather | 11°C (53°F) | 70 mm (2.7 inches) | 83% | high |
| June Weather | 14°C (57°F) | 65 mm (2.6 inches) | 83% | very high |
| July Weather | 16°C (60°F) | 74 mm (2.9 inches) | 85% | very high |
| August Weather | 15°C (59°F) | 122 mm (4.8 inches) | 85% | high |
| September Weather | 13°C (56°F) | 84 mm (3.3 inches) | 88% | moderate |
| October Weather | 10°C (51°F) | 100 mm (4.0 inches) | 91% | moderate |
| November Weather | 8°C (46°F) | 90 mm (3.6 inches) | 92% | low |
| December Weather | 7°C (45°F) | 118 mm (4.7 inches) | 89% | low |