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 Jan 2026 – 31 Jan 2026
Rainfall over this period was 202% of the 10-year average for the same calendar window at this location. Conditions were materially wetter than typical for the time of year. 6 days had gusts at or above 47 mph.
Rainfall vs 10-yr avg
202%
169 mm vs 84 mm typical
Rain days >5mm
13
typical: 6.3
Frost days
8
typical: 6.9
High-wind days
6
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Jan 2026 | 0.0 | -1.0 | 5.6 | 28 | frost |
| 2 Jan 2026 | 0.3 | -0.4 | 3.7 | 27 | frost |
| 3 Jan 2026 | 0.0 | -1.6 | 2.7 | 30 | frost |
| 4 Jan 2026 | 0.0 | -3.0 | 3.0 | 21 | frost |
| 5 Jan 2026 | 0.0 | -2.3 | 1.4 | 20 | frost |
| 6 Jan 2026 | 0.4 | -4.5 | 6.1 | 37 | frost |
| 7 Jan 2026 | 5.9 | 1.6 | 6.1 | 49 | wet · wind |
| 8 Jan 2026 | 15.9 | 2.8 | 10.0 | 45 | wet |
| 9 Jan 2026 | 7.2 | 2.6 | 7.3 | 51 | wet · wind |
| 10 Jan 2026 | 0.0 | -1.8 | 3.8 | 30 | frost |
| 11 Jan 2026 | 5.1 | -1.2 | 9.3 | 48 | wet · frost · wind |
| 12 Jan 2026 | 2.8 | 9.4 | 10.4 | 50 | wind |
| 13 Jan 2026 | 12.4 | 8.6 | 10.3 | 36 | wet |
| 14 Jan 2026 | 0.2 | 1.5 | 9.8 | 31 | |
| 15 Jan 2026 | 18.7 | 7.6 | 9.7 | 44 | wet |
| 16 Jan 2026 | 4.1 | 5.4 | 9.3 | 27 | |
| 17 Jan 2026 | 6.8 | 6.8 | 9.4 | 25 | wet |
| 18 Jan 2026 | 0.4 | 6.8 | 10.7 | 18 | |
| 19 Jan 2026 | 1.0 | 8.5 | 9.9 | 25 | |
| 20 Jan 2026 | 3.9 | 8.0 | 9.4 | 53 | wind |
| 21 Jan 2026 | 10.0 | 7.0 | 10.6 | 52 | wet · wind |
| 22 Jan 2026 | 9.8 | 8.3 | 10.4 | 37 | wet |
| 23 Jan 2026 | 8.3 | 6.3 | 9.0 | 43 | wet |
| 24 Jan 2026 | 2.1 | 6.8 | 8.7 | 40 | |
| 25 Jan 2026 | 13.5 | 5.7 | 7.6 | 32 | wet |
| 26 Jan 2026 | 0.4 | 5.1 | 7.6 | 28 | |
| 27 Jan 2026 | 24.1 | 6.7 | 10.0 | 46 | wet |
| 28 Jan 2026 | 1.0 | 4.2 | 8.7 | 28 | |
| 29 Jan 2026 | 0.7 | 3.5 | 6.4 | 29 | |
| 30 Jan 2026 | 11.3 | 5.9 | 9.8 | 38 | wet |
| 31 Jan 2026 | 2.8 | 6.8 | 9.2 | 29 |
13 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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