Daily rainfall, frost and wind for Bolton against the 10-year average — the starting point for any weather delay conversation on site.
Weather delay record
BL1 1RU · 1 Aug 2026 – 31 Aug 2026
Rainfall over this period was 96% 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
96%
118 mm vs 122 mm typical
Rain days >5mm
12
typical: 7.8
Frost days
0
typical: 0.0
High-wind days
0
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Aug 2026 | 1.2 | 10.9 | 17.0 | 28 | |
| 2 Aug 2026 | 0.2 | 9.7 | 20.5 | 23 | |
| 3 Aug 2026 | 0.2 | 14.2 | 25.5 | 26 | |
| 4 Aug 2026 | 6.8 | 15.9 | 23.8 | 25 | wet |
| 5 Aug 2026 | 5.5 | 12.7 | 16.4 | 40 | wet |
| 6 Aug 2026 | 1.5 | 11.5 | 15.1 | 28 | |
| 7 Aug 2026 | 0.5 | 9.3 | 18.2 | 23 | |
| 8 Aug 2026 | 0.0 | 10.4 | 22.8 | 20 | |
| 9 Aug 2026 | 0.0 | 12.3 | 20.9 | 22 | |
| 10 Aug 2026 | 0.6 | 10.7 | 18.3 | 20 | |
| 11 Aug 2026 | 0.0 | 10.8 | 24.9 | 21 | |
| 12 Aug 2026 | 0.0 | 14.7 | 29.3 | 19 | |
| 13 Aug 2026 | 0.0 | 19.4 | 31.7 | 26 | |
| 14 Aug 2026 | 0.1 | 14.9 | 22.2 | 23 | |
| 15 Aug 2026 | 0.0 | 12.6 | 17.4 | 22 | |
| 16 Aug 2026 | 5.7 | 10.6 | 18.4 | 19 | wet |
| 17 Aug 2026 | 5.2 | 13.2 | 18.1 | 18 | wet |
| 18 Aug 2026 | 5.9 | 14.0 | 16.9 | 28 | wet |
| 19 Aug 2026 | 15.6 | 12.5 | 17.1 | 24 | wet |
| 20 Aug 2026 | 6.7 | 11.9 | 15.4 | 23 | wet |
| 21 Aug 2026 | 3.1 | 9.2 | 16.5 | 18 | |
| 22 Aug 2026 | 1.0 | 8.7 | 16.3 | 21 | |
| 23 Aug 2026 | 0.0 | 7.5 | 18.4 | 9 | |
| 24 Aug 2026 | 0.0 | 10.3 | 18.7 | 24 | |
| 25 Aug 2026 | 0.0 | 12.5 | 20.5 | 30 | |
| 26 Aug 2026 | 3.9 | 14.6 | 22.3 | 28 | |
| 27 Aug 2026 | 14.8 | 14.7 | 18.9 | 25 | wet |
| 28 Aug 2026 | 6.6 | 14.1 | 17.0 | 28 | wet |
| 29 Aug 2026 | 10.3 | 13.4 | 16.4 | 14 | wet |
| 30 Aug 2026 | 17.2 | 12.7 | 19.1 | 26 | wet |
| 31 Aug 2026 | 5.2 | 12.2 | 16.6 | 32 | wet |
12 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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