Belfast weather in October
October in Belfast: cool, rainy, with clean air — a great time to visit.
#7 of 12 months in Belfast · #626 of 897 destinations to visit in October · comfort 71/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Belfast in October
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Belfast climate normals — October
| Daytime high | 13°C / 56°F | 🙂 cool |
|---|---|---|
| Nighttime low | 10°C / 49°F | |
| Rainfall | 108 mm / 4.3 in | 🌧 rainy |
| Rainy days | 17 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 9°C / 49°F | |
| Sunshine | 5.4 h/day | |
| Daylight | 10.5 h | |
| Wind | 24 km/h / 15 mph | |
| Air quality (US AQI) | 30 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Belfast in October — FAQ
- Is October a good time to visit Belfast?
- October in Belfast: cool, rainy, with clean air — a great time to visit. It ranks #7 of 12 months for Belfast on SeasonMap's comfort score (71/100).
- What is the weather like in Belfast in October?
- In October, Belfast averages a daily high of 13.3°C and a low of 9.7°C, with about 108.4 mm of rain over roughly 17.4 rainy days.
- What is the air quality in Belfast in October?
- Belfast has a mean US Air Quality Index of about 30 in October.