Daily rainfall, frost and wind for Cardiff against the 10-year average — the starting point for any weather delay conversation on site.
Weather delay record
CF10 1EP · 1 May 2025 – 31 May 2025
Rainfall over this period was 69% of the 10-year average for the same calendar window at this location. Conditions were drier than typical for the time of year. 1 day had gusts at or above 47 mph.
Rainfall vs 10-yr avg
69%
50 mm vs 73 mm typical
Rain days >5mm
4
typical: 5.1
Frost days
0
typical: 0.0
High-wind days
1
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 May 2025 | 0.0 | 10.7 | 23.9 | 15 | |
| 2 May 2025 | 0.0 | 11.6 | 20.8 | 23 | |
| 3 May 2025 | 0.1 | 10.5 | 19.3 | 25 | |
| 4 May 2025 | 0.0 | 8.1 | 14.4 | 29 | |
| 5 May 2025 | 0.0 | 4.8 | 13.9 | 32 | |
| 6 May 2025 | 0.0 | 4.6 | 15.0 | 21 | |
| 7 May 2025 | 0.0 | 7.0 | 15.8 | 19 | |
| 8 May 2025 | 0.1 | 9.1 | 15.3 | 25 | |
| 9 May 2025 | 0.0 | 6.2 | 18.2 | 23 | |
| 10 May 2025 | 0.0 | 8.5 | 20.6 | 22 | |
| 11 May 2025 | 0.8 | 11.3 | 20.6 | 26 | |
| 12 May 2025 | 1.5 | 12.1 | 18.3 | 23 | |
| 13 May 2025 | 2.0 | 12.3 | 18.9 | 26 | |
| 14 May 2025 | 0.0 | 10.2 | 20.0 | 24 | |
| 15 May 2025 | 0.0 | 8.9 | 18.7 | 20 | |
| 16 May 2025 | 0.0 | 9.2 | 18.6 | 20 | |
| 17 May 2025 | 0.0 | 8.7 | 17.8 | 23 | |
| 18 May 2025 | 0.0 | 7.2 | 18.9 | 23 | |
| 19 May 2025 | 0.0 | 8.8 | 17.2 | 24 | |
| 20 May 2025 | 0.1 | 10.1 | 18.9 | 17 | |
| 21 May 2025 | 9.6 | 10.9 | 18.5 | 23 | wet |
| 22 May 2025 | 1.8 | 8.7 | 19.2 | 22 | |
| 23 May 2025 | 0.1 | 8.5 | 17.8 | 27 | |
| 24 May 2025 | 5.4 | 14.2 | 16.9 | 40 | wet |
| 25 May 2025 | 3.4 | 12.5 | 15.5 | 45 | |
| 26 May 2025 | 4.2 | 11.6 | 15.6 | 43 | |
| 27 May 2025 | 10.7 | 13.6 | 15.7 | 49 | wet · wind |
| 28 May 2025 | 1.0 | 13.2 | 16.1 | 47 | |
| 29 May 2025 | 8.9 | 13.7 | 17.9 | 41 | wet |
| 30 May 2025 | 0.2 | 14.2 | 18.8 | 32 | |
| 31 May 2025 | 0.5 | 14.0 | 18.2 | 31 |
4 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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