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 Jan 2025 – 31 Jan 2025
Rainfall over this period was 115% 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. 1 day had gusts at or above 47 mph.
Rainfall vs 10-yr avg
115%
141 mm vs 123 mm typical
Rain days >5mm
8
typical: 8.1
Frost days
12
typical: 10.1
High-wind days
1
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Jan 2025 | 33.6 | 0.9 | 9.1 | 36 | wet |
| 2 Jan 2025 | 0.0 | -2.4 | 1.0 | 14 | frost |
| 3 Jan 2025 | 1.0 | -1.8 | 3.6 | 23 | frost |
| 4 Jan 2025 | 1.1 | -0.7 | 1.5 | 18 | frost |
| 5 Jan 2025 | 27.4 | 0.1 | 1.5 | 35 | wet |
| 6 Jan 2025 | 16.0 | 0.7 | 3.3 | 30 | wet |
| 7 Jan 2025 | 2.2 | -1.1 | 2.3 | 23 | frost |
| 8 Jan 2025 | 0.0 | -5.7 | 0.4 | 21 | frost |
| 9 Jan 2025 | 0.1 | -4.3 | 1.9 | 18 | frost |
| 10 Jan 2025 | 0.0 | -4.8 | 2.1 | 12 | frost |
| 11 Jan 2025 | 0.7 | -3.7 | 0.3 | 11 | frost |
| 12 Jan 2025 | 0.0 | -0.4 | 2.4 | 15 | frost |
| 13 Jan 2025 | 0.2 | 0.2 | 3.6 | 21 | |
| 14 Jan 2025 | 1.3 | 3.3 | 8.5 | 15 | |
| 15 Jan 2025 | 0.0 | 1.4 | 7.3 | 9 | |
| 16 Jan 2025 | 0.0 | 1.3 | 5.1 | 15 | |
| 17 Jan 2025 | 0.0 | 1.6 | 5.5 | 15 | |
| 18 Jan 2025 | 0.0 | -1.7 | 4.0 | 20 | frost |
| 19 Jan 2025 | 0.0 | -1.9 | 0.7 | 20 | frost |
| 20 Jan 2025 | 3.3 | -0.5 | 3.1 | 9 | frost |
| 21 Jan 2025 | 7.1 | 2.9 | 4.3 | 13 | wet |
| 22 Jan 2025 | 0.4 | 2.4 | 4.2 | 9 | |
| 23 Jan 2025 | 7.0 | 0.8 | 4.7 | 29 | wet |
| 24 Jan 2025 | 11.2 | 2.5 | 8.9 | 57 | wet · wind |
| 25 Jan 2025 | 0.8 | 0.5 | 4.7 | 25 | |
| 26 Jan 2025 | 2.6 | 0.1 | 5.0 | 39 | |
| 27 Jan 2025 | 17.6 | 1.7 | 6.6 | 34 | wet |
| 28 Jan 2025 | 2.4 | 2.6 | 6.9 | 23 | |
| 29 Jan 2025 | 0.0 | 1.5 | 6.2 | 23 | |
| 30 Jan 2025 | 0.1 | 0.3 | 5.1 | 25 | |
| 31 Jan 2025 | 5.3 | 1.0 | 6.4 | 20 | wet |
8 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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