Daily rainfall, frost and wind for Bristol against the 10-year average — the starting point for any weather delay conversation on site.
Weather delay record
BS1 4DJ · 1 May 2025 – 31 May 2025
Rainfall over this period was 108% 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.
Rainfall vs 10-yr avg
108%
77 mm vs 72 mm typical
Rain days >5mm
4
typical: 4.7
Frost days
0
typical: 0.1
High-wind days
0
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 May 2025 | 0.0 | 11.5 | 26.8 | 21 | |
| 2 May 2025 | 0.0 | 11.0 | 23.5 | 21 | |
| 3 May 2025 | 0.0 | 9.2 | 19.5 | 33 | |
| 4 May 2025 | 0.0 | 6.8 | 14.3 | 27 | |
| 5 May 2025 | 0.0 | 4.0 | 13.7 | 33 | |
| 6 May 2025 | 0.0 | 3.5 | 14.5 | 23 | |
| 7 May 2025 | 0.0 | 5.7 | 18.3 | 25 | |
| 8 May 2025 | 0.1 | 7.8 | 14.9 | 26 | |
| 9 May 2025 | 0.0 | 4.6 | 18.7 | 23 | |
| 10 May 2025 | 0.0 | 7.1 | 22.6 | 29 | |
| 11 May 2025 | 1.1 | 10.0 | 23.1 | 27 | |
| 12 May 2025 | 4.9 | 12.3 | 19.8 | 25 | |
| 13 May 2025 | 21.7 | 10.9 | 21.3 | 24 | wet |
| 14 May 2025 | 0.0 | 8.5 | 20.7 | 20 | |
| 15 May 2025 | 0.0 | 7.4 | 17.8 | 26 | |
| 16 May 2025 | 0.0 | 8.0 | 20.5 | 20 | |
| 17 May 2025 | 0.0 | 7.6 | 18.2 | 19 | |
| 18 May 2025 | 0.0 | 8.0 | 19.3 | 19 | |
| 19 May 2025 | 0.2 | 7.8 | 17.0 | 21 | |
| 20 May 2025 | 0.0 | 8.4 | 20.5 | 19 | |
| 21 May 2025 | 17.8 | 10.6 | 18.4 | 22 | wet |
| 22 May 2025 | 0.0 | 9.5 | 19.3 | 21 | |
| 23 May 2025 | 0.3 | 8.9 | 18.6 | 27 | |
| 24 May 2025 | 3.6 | 13.2 | 17.4 | 38 | |
| 25 May 2025 | 3.4 | 12.3 | 16.1 | 45 | |
| 26 May 2025 | 5.7 | 11.3 | 16.6 | 38 | wet |
| 27 May 2025 | 10.8 | 12.8 | 15.8 | 41 | wet |
| 28 May 2025 | 3.3 | 12.4 | 16.7 | 37 | |
| 29 May 2025 | 3.9 | 13.1 | 19.7 | 37 | |
| 30 May 2025 | 0.6 | 14.2 | 20.7 | 27 | |
| 31 May 2025 | 0.1 | 13.6 | 20.5 | 26 |
4 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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