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 Oct 2025 – 31 Oct 2025
Rainfall over this period was 119% 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. 3 days had gusts at or above 47 mph.
Rainfall vs 10-yr avg
119%
114 mm vs 96 mm typical
Rain days >5mm
6
typical: 6.6
Frost days
0
typical: 0.0
High-wind days
3
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Oct 2025 | 10.6 | 14.0 | 17.5 | 28 | wet |
| 2 Oct 2025 | 16.1 | 13.8 | 15.6 | 43 | wet |
| 3 Oct 2025 | 14.0 | 10.2 | 17.9 | 74 | wet · wind |
| 4 Oct 2025 | 3.7 | 8.1 | 12.7 | 56 | wind |
| 5 Oct 2025 | 0.0 | 10.3 | 13.6 | 41 | |
| 6 Oct 2025 | 0.2 | 11.9 | 17.1 | 30 | |
| 7 Oct 2025 | 1.1 | 8.6 | 14.4 | 29 | |
| 8 Oct 2025 | 0.0 | 7.6 | 13.8 | 30 | |
| 9 Oct 2025 | 0.0 | 11.4 | 15.2 | 29 | |
| 10 Oct 2025 | 0.0 | 9.4 | 12.7 | 19 | |
| 11 Oct 2025 | 0.0 | 6.8 | 13.0 | 13 | |
| 12 Oct 2025 | 0.0 | 7.6 | 13.1 | 12 | |
| 13 Oct 2025 | 0.0 | 7.1 | 13.3 | 13 | |
| 14 Oct 2025 | 0.0 | 9.0 | 12.7 | 9 | |
| 15 Oct 2025 | 0.1 | 8.7 | 11.2 | 13 | |
| 16 Oct 2025 | 0.0 | 8.8 | 10.9 | 10 | |
| 17 Oct 2025 | 0.1 | 8.6 | 11.6 | 15 | |
| 18 Oct 2025 | 0.9 | 9.6 | 13.8 | 36 | |
| 19 Oct 2025 | 32.8 | 11.0 | 14.0 | 36 | wet |
| 20 Oct 2025 | 1.0 | 8.9 | 14.5 | 15 | |
| 21 Oct 2025 | 4.6 | 8.8 | 12.2 | 31 | |
| 22 Oct 2025 | 0.2 | 5.3 | 11.6 | 22 | |
| 23 Oct 2025 | 0.2 | 5.3 | 9.7 | 29 | |
| 24 Oct 2025 | 0.3 | 5.2 | 11.5 | 29 | |
| 25 Oct 2025 | 0.6 | 5.9 | 9.1 | 32 | |
| 26 Oct 2025 | 1.7 | 5.7 | 11.2 | 36 | |
| 27 Oct 2025 | 4.3 | 8.2 | 11.1 | 41 | |
| 28 Oct 2025 | 0.7 | 8.6 | 11.5 | 43 | |
| 29 Oct 2025 | 0.3 | 5.0 | 10.4 | 33 | |
| 30 Oct 2025 | 14.7 | 2.8 | 12.4 | 62 | wet · wind |
| 31 Oct 2025 | 5.8 | 9.9 | 12.8 | 42 | wet |
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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