Daily rainfall, frost and wind for Brighton against the 10-year average — the starting point for any weather delay conversation on site.
Weather delay record
BN1 1UG · 1 Dec 2025 – 31 Dec 2025
Rainfall over this period was 106% 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. 6 days had gusts at or above 47 mph.
Rainfall vs 10-yr avg
106%
116 mm vs 109 mm typical
Rain days >5mm
8
typical: 7.9
Frost days
1
typical: 2.5
High-wind days
6
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Dec 2025 | 7.7 | 9.5 | 11.7 | 53 | wet · wind |
| 2 Dec 2025 | 12.2 | 8.3 | 11.1 | 48 | wet · wind |
| 3 Dec 2025 | 3.7 | 7.3 | 9.9 | 28 | |
| 4 Dec 2025 | 7.0 | 3.8 | 9.7 | 41 | wet |
| 5 Dec 2025 | 8.1 | 1.5 | 10.5 | 60 | wet · wind |
| 6 Dec 2025 | 15.4 | 10.1 | 11.9 | 50 | wet · wind |
| 7 Dec 2025 | 12.2 | 10.2 | 13.8 | 50 | wet · wind |
| 8 Dec 2025 | 4.3 | 11.7 | 13.6 | 37 | |
| 9 Dec 2025 | 9.0 | 11.9 | 14.0 | 46 | wet |
| 10 Dec 2025 | 0.7 | 10.2 | 12.5 | 37 | |
| 11 Dec 2025 | 0.0 | 9.8 | 10.9 | 28 | |
| 12 Dec 2025 | 0.7 | 7.7 | 11.9 | 33 | |
| 13 Dec 2025 | 0.0 | 3.5 | 10.0 | 18 | |
| 14 Dec 2025 | 0.0 | 8.7 | 10.8 | 36 | |
| 15 Dec 2025 | 2.9 | 10.0 | 11.4 | 36 | |
| 16 Dec 2025 | 0.6 | 6.9 | 11.9 | 28 | |
| 17 Dec 2025 | 0.0 | 1.9 | 10.4 | 42 | |
| 18 Dec 2025 | 24.2 | 10.5 | 12.5 | 56 | wet · wind |
| 19 Dec 2025 | 1.7 | 8.2 | 11.2 | 36 | |
| 20 Dec 2025 | 0.6 | 7.8 | 9.7 | 27 | |
| 21 Dec 2025 | 4.1 | 8.9 | 11.1 | 32 | |
| 22 Dec 2025 | 0.6 | 8.0 | 11.2 | 32 | |
| 23 Dec 2025 | 0.0 | 5.8 | 7.7 | 32 | |
| 24 Dec 2025 | 0.0 | 4.0 | 6.2 | 41 | |
| 25 Dec 2025 | 0.0 | 1.5 | 4.3 | 42 | |
| 26 Dec 2025 | 0.0 | 0.3 | 5.0 | 28 | |
| 27 Dec 2025 | 0.0 | 2.1 | 8.2 | 35 | |
| 28 Dec 2025 | 0.0 | 3.6 | 7.6 | 28 | |
| 29 Dec 2025 | 0.0 | 2.6 | 6.8 | 24 | |
| 30 Dec 2025 | 0.0 | 1.6 | 6.3 | 24 | |
| 31 Dec 2025 | 0.0 | -0.8 | 3.2 | 17 | frost |
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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