The climate in Mayo during December can be summarized as mild and a little damp.
December is in the winter in Mayo and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around 20°C (67°F), whilst at night 7°C (44°F) is normal.
Daytime temperature | 19.7°C 67.4°F |
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Nightly temperature | 6.8°C 44.2°F |
Average temperature | 13.2°C 55.8°F |
Daily sunshine | 6.6 hrs |
Avg rainfall | 100 mm 3.9 ins |
Rainy days | 8 days |
Sea temperature | 20.5°C 69°F |
Humidity | 76% |
Windspeed | 11.9kph 7 mph |
On average December is the 5th driest month of the year in Mayo with around 100mm 3.9 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.6 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Mayo in December 2025.
Best places to visit in December
Hottest month: | July | 32.8°C 91°F |
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Driest month: | October | 61mm 2.4ins |
Sunniest month: | April | 10.4hrs |
Coldest month: | January | 17.8°C 64°F |
Wettest month: | July | 179mm 7ins |