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 Mar 2025 – 31 Mar 2025
Rainfall over this period was 29% of the 10-year average for the same calendar window at this location. Conditions were drier than typical for the time of year.
Rainfall vs 10-yr avg
29%
35 mm vs 122 mm typical
Rain days >5mm
3
typical: 9.3
Frost days
4
typical: 2.3
High-wind days
0
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Mar 2025 | 0.0 | 0.1 | 9.7 | 10 | |
| 2 Mar 2025 | 0.0 | -0.3 | 9.0 | 14 | frost |
| 3 Mar 2025 | 0.0 | 0.0 | 10.8 | 10 | frost |
| 4 Mar 2025 | 0.0 | 0.1 | 9.5 | 15 | |
| 5 Mar 2025 | 0.0 | 2.5 | 11.4 | 16 | |
| 6 Mar 2025 | 3.5 | 4.5 | 13.7 | 27 | |
| 7 Mar 2025 | 5.7 | 9.4 | 13.8 | 30 | wet |
| 8 Mar 2025 | 0.5 | 9.7 | 15.1 | 29 | |
| 9 Mar 2025 | 0.0 | 10.3 | 16.3 | 24 | |
| 10 Mar 2025 | 4.5 | 8.2 | 13.8 | 24 | |
| 11 Mar 2025 | 0.6 | 3.8 | 9.3 | 23 | |
| 12 Mar 2025 | 0.4 | 0.0 | 8.7 | 28 | frost |
| 13 Mar 2025 | 0.0 | 1.0 | 7.6 | 28 | |
| 14 Mar 2025 | 0.3 | -0.5 | 9.1 | 17 | frost |
| 15 Mar 2025 | 0.1 | 2.6 | 8.5 | 21 | |
| 16 Mar 2025 | 0.0 | 0.8 | 9.3 | 19 | |
| 17 Mar 2025 | 0.0 | 4.6 | 8.3 | 25 | |
| 18 Mar 2025 | 0.0 | 3.1 | 11.0 | 32 | |
| 19 Mar 2025 | 0.0 | 3.3 | 13.9 | 21 | |
| 20 Mar 2025 | 0.0 | 8.2 | 17.9 | 31 | |
| 21 Mar 2025 | 4.0 | 9.9 | 15.5 | 34 | |
| 22 Mar 2025 | 5.2 | 9.5 | 16.6 | 27 | wet |
| 23 Mar 2025 | 0.1 | 7.8 | 12.4 | 29 | |
| 24 Mar 2025 | 0.0 | 5.3 | 12.3 | 16 | |
| 25 Mar 2025 | 0.2 | 4.4 | 15.2 | 18 | |
| 26 Mar 2025 | 0.0 | 4.0 | 12.3 | 15 | |
| 27 Mar 2025 | 0.4 | 7.7 | 11.3 | 28 | |
| 28 Mar 2025 | 6.9 | 5.6 | 10.5 | 33 | wet |
| 29 Mar 2025 | 2.5 | 3.3 | 10.8 | 34 | |
| 30 Mar 2025 | 0.0 | 6.5 | 13.5 | 27 | |
| 31 Mar 2025 | 0.0 | 3.2 | 15.2 | 20 |
3 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