Galway weather in December
December in Galway: cold, rainy, with clean air — a fair time to visit.
#12 of 12 months in Galway · #686 of 897 destinations to visit in December · comfort 56/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Galway in December
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Galway climate normals — December
| Daytime high | 8°C / 47°F | 🧥 cold |
|---|---|---|
| Nighttime low | 5°C / 40°F | |
| Rainfall | 103 mm / 4.1 in | 🌧 rainy |
| Rainy days | 17 days | |
| Humidity | 88% | 💦 very humid |
| Dew point | 4°C / 40°F | |
| Sunshine | 3.2 h/day | |
| Daylight | 7.6 h | |
| Wind | 24 km/h / 15 mph | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Galway in December — FAQ
- Is December a good time to visit Galway?
- December in Galway: cold, rainy, with clean air — a fair time to visit. It ranks #12 of 12 months for Galway on SeasonMap's comfort score (56/100).
- What is the weather like in Galway in December?
- In December, Galway averages a daily high of 8.4°C and a low of 4.6°C, with about 103.2 mm of rain over roughly 16.6 rainy days.
- What is the air quality in Galway in December?
- Galway has a mean US Air Quality Index of about 35 in December.