Daily rainfall, frost and wind for Birmingham against the 10-year average — the starting point for any weather delay conversation on site.
Weather delay record
B1 1BB · 1 Dec 2025 – 31 Dec 2025
Rainfall over this period was 143% of the 10-year average for the same calendar window at this location. Conditions were materially wetter than typical for the time of year. 1 day had gusts at or above 47 mph.
Rainfall vs 10-yr avg
143%
112 mm vs 78 mm typical
Rain days >5mm
7
typical: 5.1
Frost days
1
typical: 4.8
High-wind days
1
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Dec 2025 | 16.6 | 5.5 | 11.9 | 46 | wet |
| 2 Dec 2025 | 0.2 | 4.9 | 8.7 | 32 | |
| 3 Dec 2025 | 0.0 | 1.8 | 6.6 | 18 | |
| 4 Dec 2025 | 6.5 | 3.1 | 6.5 | 26 | wet |
| 5 Dec 2025 | 6.6 | 1.1 | 8.3 | 47 | wet |
| 6 Dec 2025 | 1.3 | 7.7 | 10.4 | 35 | |
| 7 Dec 2025 | 2.4 | 6.4 | 12.9 | 40 | |
| 8 Dec 2025 | 0.0 | 8.0 | 11.4 | 31 | |
| 9 Dec 2025 | 13.9 | 9.8 | 13.9 | 49 | wet · wind |
| 10 Dec 2025 | 0.0 | 8.0 | 11.0 | 34 | |
| 11 Dec 2025 | 0.0 | 6.9 | 10.3 | 34 | |
| 12 Dec 2025 | 4.2 | 5.4 | 9.8 | 26 | |
| 13 Dec 2025 | 0.0 | 3.3 | 7.4 | 29 | |
| 14 Dec 2025 | 0.4 | 6.8 | 10.5 | 38 | |
| 15 Dec 2025 | 15.0 | 7.9 | 10.5 | 38 | wet |
| 16 Dec 2025 | 13.3 | 1.9 | 7.5 | 23 | wet |
| 17 Dec 2025 | 4.9 | 0.8 | 9.7 | 44 | |
| 18 Dec 2025 | 21.3 | 8.3 | 10.1 | 45 | wet |
| 19 Dec 2025 | 0.0 | 5.5 | 9.1 | 27 | |
| 20 Dec 2025 | 0.0 | 3.3 | 7.0 | 28 | |
| 21 Dec 2025 | 2.9 | 5.5 | 8.8 | 22 | |
| 22 Dec 2025 | 2.6 | 7.5 | 9.3 | 27 | |
| 23 Dec 2025 | 0.1 | 5.0 | 7.4 | 28 | |
| 24 Dec 2025 | 0.1 | 2.3 | 4.9 | 36 | |
| 25 Dec 2025 | 0.0 | 2.1 | 4.3 | 32 | |
| 26 Dec 2025 | 0.0 | 0.9 | 4.5 | 25 | |
| 27 Dec 2025 | 0.0 | 1.0 | 6.0 | 30 | |
| 28 Dec 2025 | 0.0 | 4.0 | 5.9 | 24 | |
| 29 Dec 2025 | 0.0 | 3.9 | 5.0 | 20 | |
| 30 Dec 2025 | 0.0 | 0.8 | 4.7 | 15 | |
| 31 Dec 2025 | 0.0 | -1.3 | 3.1 | 21 | frost |
7 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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