Weather in Belfast, Northern Ireland, United Kingdom in May
In an average May, Belfast sees a daily high around 13°C and a low around 8°C, based on 1981–2026 of local climate records.
| Average high | 13°C |
|---|---|
| Typical high range | 10°C to 15°C |
| Average low | 8°C |
| Typical low range | 5°C to 10°C |
| Average daily precipitation | 3 mm |
May records
The most extreme May on record for each metric, across 1981–2026. For rainfall, the wettest and driest are by total May accumulation.
High
Highest
21°C
2026-05-25
Lowest
5°C
1997-05-06
Low
Highest
13°C
2025-05-24
Lowest
1°C
1982-05-05
Feels-like
Highest
13°C
2025-05-24
Lowest
-5°C
1982-05-05
Humidity
Highest
11.8 g/m³
2017-05-24
Lowest
4.6 g/m³
2012-05-05
Wind
Highest
67 km/h
2011-05-23
Lowest
7 km/h
2021-05-01
Precip
Wettest
127 mm
2003
Driest
14 mm
1991
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