Daily rainfall, frost and wind for Swansea against the 10-year average — the starting point for any weather delay conversation on site.
Weather delay record
SA1 1NW · 1 Jan 2025 – 31 Jan 2025
Rainfall over this period was 121% 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. 4 days had gusts at or above 47 mph.
Rainfall vs 10-yr avg
121%
166 mm vs 137 mm typical
Rain days >5mm
10
typical: 9.3
Frost days
5
typical: 6.2
High-wind days
4
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Jan 2025 | 15.6 | 3.9 | 10.5 | 51 | wet · wind |
| 2 Jan 2025 | 0.0 | -0.1 | 4.8 | 14 | frost |
| 3 Jan 2025 | 0.0 | -1.1 | 4.7 | 11 | frost |
| 4 Jan 2025 | 5.9 | 0.6 | 2.8 | 37 | wet |
| 5 Jan 2025 | 41.6 | 1.7 | 11.6 | 40 | wet |
| 6 Jan 2025 | 10.4 | 2.6 | 10.7 | 36 | wet |
| 7 Jan 2025 | 0.2 | 0.7 | 5.3 | 23 | |
| 8 Jan 2025 | 0.4 | -0.4 | 3.0 | 21 | frost |
| 9 Jan 2025 | 0.0 | -1.6 | 4.5 | 20 | frost |
| 10 Jan 2025 | 0.0 | -1.3 | 4.0 | 22 | frost |
| 11 Jan 2025 | 0.9 | 1.8 | 4.8 | 21 | |
| 12 Jan 2025 | 0.5 | 3.3 | 8.2 | 18 | |
| 13 Jan 2025 | 0.0 | 3.2 | 7.4 | 23 | |
| 14 Jan 2025 | 0.6 | 7.2 | 10.3 | 18 | |
| 15 Jan 2025 | 0.0 | 3.1 | 9.2 | 11 | |
| 16 Jan 2025 | 0.0 | 2.7 | 6.9 | 18 | |
| 17 Jan 2025 | 0.0 | 3.4 | 8.0 | 17 | |
| 18 Jan 2025 | 0.0 | 3.0 | 5.7 | 17 | |
| 19 Jan 2025 | 0.2 | 1.6 | 4.9 | 19 | |
| 20 Jan 2025 | 0.1 | 2.2 | 7.0 | 11 | |
| 21 Jan 2025 | 0.0 | 3.5 | 6.2 | 18 | |
| 22 Jan 2025 | 0.0 | 2.2 | 7.0 | 12 | |
| 23 Jan 2025 | 6.1 | 2.0 | 8.6 | 45 | wet |
| 24 Jan 2025 | 15.7 | 6.2 | 11.1 | 61 | wet · wind |
| 25 Jan 2025 | 0.2 | 0.9 | 7.6 | 21 | |
| 26 Jan 2025 | 18.5 | 4.6 | 8.3 | 55 | wet · wind |
| 27 Jan 2025 | 32.4 | 4.8 | 8.0 | 53 | wet · wind |
| 28 Jan 2025 | 9.1 | 6.1 | 9.0 | 41 | wet |
| 29 Jan 2025 | 0.0 | 3.1 | 8.3 | 31 | |
| 30 Jan 2025 | 0.1 | 2.3 | 7.8 | 29 | |
| 31 Jan 2025 | 7.5 | 2.4 | 9.5 | 31 | wet |
10 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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