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 Dec 2024 – 31 Dec 2024
Rainfall over this period was 71% 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
71%
140 mm vs 197 mm typical
Rain days >5mm
7
typical: 12.3
Frost days
0
typical: 2.7
High-wind days
4
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Dec 2024 | 17.8 | 9.9 | 12.9 | 29 | wet |
| 2 Dec 2024 | 0.3 | 5.8 | 9.7 | 34 | |
| 3 Dec 2024 | 0.1 | 3.0 | 7.2 | 12 | |
| 4 Dec 2024 | 16.1 | 5.7 | 11.4 | 34 | wet |
| 5 Dec 2024 | 30.6 | 8.7 | 12.9 | 51 | wet · wind |
| 6 Dec 2024 | 9.5 | 4.7 | 12.7 | 53 | wet · wind |
| 7 Dec 2024 | 11.7 | 6.4 | 11.1 | 66 | wet · wind |
| 8 Dec 2024 | 0.1 | 5.6 | 7.7 | 47 | |
| 9 Dec 2024 | 0.0 | 5.3 | 8.3 | 29 | |
| 10 Dec 2024 | 0.0 | 4.6 | 7.4 | 23 | |
| 11 Dec 2024 | 0.0 | 2.5 | 6.4 | 23 | |
| 12 Dec 2024 | 0.0 | 4.6 | 7.2 | 15 | |
| 13 Dec 2024 | 0.3 | 5.9 | 7.6 | 11 | |
| 14 Dec 2024 | 0.5 | 4.8 | 8.9 | 21 | |
| 15 Dec 2024 | 0.9 | 9.3 | 11.8 | 25 | |
| 16 Dec 2024 | 3.5 | 8.9 | 11.5 | 25 | |
| 17 Dec 2024 | 3.6 | 8.0 | 12.4 | 39 | |
| 18 Dec 2024 | 22.8 | 8.4 | 12.7 | 55 | wet · wind |
| 19 Dec 2024 | 2.7 | 4.7 | 6.9 | 38 | |
| 20 Dec 2024 | 3.4 | 3.8 | 9.2 | 28 | |
| 21 Dec 2024 | 4.4 | 6.5 | 12.2 | 42 | |
| 22 Dec 2024 | 0.8 | 5.1 | 7.4 | 46 | |
| 23 Dec 2024 | 0.3 | 5.8 | 11.4 | 32 | |
| 24 Dec 2024 | 0.2 | 10.6 | 11.8 | 20 | |
| 25 Dec 2024 | 0.3 | 8.9 | 10.7 | 16 | |
| 26 Dec 2024 | 0.1 | 7.1 | 9.6 | 11 | |
| 27 Dec 2024 | 0.0 | 5.5 | 7.0 | 11 | |
| 28 Dec 2024 | 0.0 | 4.6 | 7.4 | 6 | |
| 29 Dec 2024 | 0.3 | 5.5 | 9.9 | 17 | |
| 30 Dec 2024 | 1.2 | 8.0 | 9.3 | 22 | |
| 31 Dec 2024 | 8.5 | 8.5 | 10.7 | 43 | wet |
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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