Daily rainfall, frost and wind for Belfast against the 10-year average — the starting point for any weather delay conversation on site.
Weather delay record
BT1 5GS · 1 Apr 2026 – 30 Apr 2026
Rainfall over this period was 118% of the 10-year average for the same calendar window at this location. Conditions were broadly in line with typical for the time of year. 4 days had gusts at or above 47 mph.
Rainfall vs 10-yr avg
118%
78 mm vs 66 mm typical
Rain days >5mm
6
typical: 4.6
Frost days
1
typical: 1.4
High-wind days
4
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Apr 2026 | 3.2 | 5.0 | 12.9 | 35 | |
| 2 Apr 2026 | 5.7 | -0.1 | 8.6 | 30 | wet · frost |
| 3 Apr 2026 | 1.1 | 4.7 | 10.4 | 37 | |
| 4 Apr 2026 | 8.3 | 2.0 | 10.2 | 55 | wet · wind |
| 5 Apr 2026 | 1.2 | 2.2 | 7.7 | 49 | wind |
| 6 Apr 2026 | 0.0 | 1.5 | 10.5 | 40 | |
| 7 Apr 2026 | 1.4 | 7.1 | 14.7 | 24 | |
| 8 Apr 2026 | 0.0 | 9.4 | 14.2 | 23 | |
| 9 Apr 2026 | 1.7 | 4.3 | 10.5 | 38 | |
| 10 Apr 2026 | 9.2 | 1.3 | 7.6 | 53 | wet · wind |
| 11 Apr 2026 | 5.4 | 3.2 | 9.8 | 53 | wet · wind |
| 12 Apr 2026 | 2.0 | 4.6 | 9.8 | 43 | |
| 13 Apr 2026 | 4.4 | 1.7 | 9.7 | 27 | |
| 14 Apr 2026 | 5.1 | 5.2 | 10.5 | 36 | wet |
| 15 Apr 2026 | 20.3 | 7.9 | 13.6 | 38 | wet |
| 16 Apr 2026 | 1.6 | 7.0 | 13.4 | 33 | |
| 17 Apr 2026 | 4.0 | 8.4 | 12.6 | 37 | |
| 18 Apr 2026 | 1.0 | 5.4 | 11.7 | 28 | |
| 19 Apr 2026 | 1.4 | 2.6 | 10.7 | 13 | |
| 20 Apr 2026 | 0.0 | 1.3 | 10.8 | 18 | |
| 21 Apr 2026 | 0.8 | 5.8 | 11.6 | 35 | |
| 22 Apr 2026 | 0.0 | 5.2 | 12.0 | 34 | |
| 23 Apr 2026 | 0.0 | 6.2 | 12.7 | 23 | |
| 24 Apr 2026 | 0.0 | 4.3 | 16.0 | 16 | |
| 25 Apr 2026 | 0.0 | 4.2 | 17.6 | 15 | |
| 26 Apr 2026 | 0.1 | 7.8 | 16.3 | 14 | |
| 27 Apr 2026 | 0.5 | 4.6 | 15.3 | 23 | |
| 28 Apr 2026 | 0.0 | 7.8 | 12.8 | 21 | |
| 29 Apr 2026 | 0.0 | 6.1 | 15.1 | 29 | |
| 30 Apr 2026 | 0.0 | 7.9 | 17.7 | 28 |
6 days with rainfall over 5 mm in this period.
Data: ERA5 reanalysis via Open-Meteo, taken at the nearest model grid point to the postcode — not a Met Office station record. Baselines are the mean of the same calendar months over the previous 10 years at this location. Whether conditions meet a contractual test (e.g. JCT “exceptionally adverse weather” or an NEC 1-in-10-year event) is a matter for the contract — this is a factual weather record, not advice.
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