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 Nov 2025 – 30 Nov 2025
Rainfall over this period was 184% 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
184%
281 mm vs 152 mm typical
Rain days >5mm
14
typical: 9.4
Frost days
1
typical: 0.9
High-wind days
1
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Nov 2025 | 28.8 | 8.3 | 13.3 | 49 | wet · wind |
| 2 Nov 2025 | 9.2 | 6.5 | 12.0 | 32 | wet |
| 3 Nov 2025 | 12.9 | 12.2 | 14.1 | 41 | wet |
| 4 Nov 2025 | 46.7 | 13.3 | 14.6 | 38 | wet |
| 5 Nov 2025 | 11.1 | 13.7 | 16.2 | 36 | wet |
| 6 Nov 2025 | 2.2 | 11.2 | 15.2 | 23 | |
| 7 Nov 2025 | 4.2 | 10.8 | 14.1 | 29 | |
| 8 Nov 2025 | 0.7 | 8.9 | 13.2 | 19 | |
| 9 Nov 2025 | 4.0 | 11.1 | 13.6 | 31 | |
| 10 Nov 2025 | 15.5 | 8.8 | 12.1 | 26 | wet |
| 11 Nov 2025 | 14.9 | 9.9 | 14.7 | 47 | wet |
| 12 Nov 2025 | 42.6 | 12.3 | 14.3 | 34 | wet |
| 13 Nov 2025 | 3.3 | 12.0 | 14.6 | 34 | |
| 14 Nov 2025 | 19.2 | 10.1 | 12.6 | 44 | wet |
| 15 Nov 2025 | 0.8 | 10.1 | 13.5 | 25 | |
| 16 Nov 2025 | 0.0 | 5.0 | 10.6 | 18 | |
| 17 Nov 2025 | 0.0 | 0.8 | 7.5 | 16 | |
| 18 Nov 2025 | 0.2 | 1.2 | 8.4 | 21 | |
| 19 Nov 2025 | 0.0 | 0.9 | 6.3 | 37 | |
| 20 Nov 2025 | 0.0 | 0.1 | 5.8 | 21 | |
| 21 Nov 2025 | 0.0 | -1.2 | 7.2 | 25 | frost |
| 22 Nov 2025 | 20.0 | 5.8 | 10.5 | 34 | wet |
| 23 Nov 2025 | 7.1 | 6.3 | 10.2 | 36 | wet |
| 24 Nov 2025 | 1.9 | 5.6 | 9.3 | 33 | |
| 25 Nov 2025 | 0.0 | 0.9 | 8.0 | 20 | |
| 26 Nov 2025 | 5.7 | 0.4 | 11.6 | 31 | wet |
| 27 Nov 2025 | 3.3 | 10.4 | 12.8 | 34 | |
| 28 Nov 2025 | 8.5 | 9.1 | 11.3 | 46 | wet |
| 29 Nov 2025 | 16.1 | 5.0 | 10.6 | 42 | wet |
| 30 Nov 2025 | 1.9 | 3.6 | 9.5 | 31 |
14 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.
Need this for your exact site and dates?
Run the free tool with your postcode and claim period — print-ready evidence in seconds.
Check your site's dates