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 Aug 2025 – 31 Aug 2025
Rainfall over this period was 62% 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
62%
51 mm vs 82 mm typical
Rain days >5mm
4
typical: 5.0
Frost days
0
typical: 0.0
High-wind days
0
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Aug 2025 | 0.0 | 12.1 | 20.6 | 27 | |
| 2 Aug 2025 | 0.1 | 10.8 | 19.4 | 29 | |
| 3 Aug 2025 | 3.2 | 14.7 | 22.0 | 38 | |
| 4 Aug 2025 | 2.9 | 16.3 | 21.5 | 44 | |
| 5 Aug 2025 | 0.1 | 13.6 | 19.8 | 32 | |
| 6 Aug 2025 | 0.0 | 9.6 | 20.5 | 23 | |
| 7 Aug 2025 | 3.4 | 15.5 | 20.6 | 31 | |
| 8 Aug 2025 | 0.0 | 14.1 | 19.8 | 28 | |
| 9 Aug 2025 | 0.1 | 16.1 | 20.6 | 37 | |
| 10 Aug 2025 | 0.0 | 14.8 | 24.2 | 19 | |
| 11 Aug 2025 | 0.3 | 14.5 | 26.3 | 19 | |
| 12 Aug 2025 | 0.1 | 18.2 | 30.6 | 23 | |
| 13 Aug 2025 | 0.0 | 17.3 | 23.1 | 23 | |
| 14 Aug 2025 | 0.7 | 17.6 | 22.2 | 34 | |
| 15 Aug 2025 | 0.0 | 13.8 | 26.5 | 22 | |
| 16 Aug 2025 | 0.0 | 17.2 | 24.7 | 30 | |
| 17 Aug 2025 | 0.0 | 13.5 | 25.7 | 27 | |
| 18 Aug 2025 | 0.1 | 16.9 | 22.9 | 28 | |
| 19 Aug 2025 | 0.0 | 15.9 | 23.4 | 28 | |
| 20 Aug 2025 | 0.0 | 14.1 | 18.9 | 30 | |
| 21 Aug 2025 | 0.0 | 13.1 | 20.5 | 19 | |
| 22 Aug 2025 | 0.0 | 10.8 | 21.8 | 23 | |
| 23 Aug 2025 | 0.0 | 12.3 | 23.6 | 15 | |
| 24 Aug 2025 | 0.0 | 14.6 | 24.9 | 24 | |
| 25 Aug 2025 | 0.0 | 14.6 | 25.8 | 30 | |
| 26 Aug 2025 | 4.6 | 16.5 | 20.4 | 33 | |
| 27 Aug 2025 | 11.0 | 15.6 | 19.0 | 35 | wet |
| 28 Aug 2025 | 7.7 | 14.5 | 17.4 | 36 | wet |
| 29 Aug 2025 | 8.0 | 14.1 | 18.3 | 31 | wet |
| 30 Aug 2025 | 5.6 | 15.0 | 19.0 | 41 | wet |
| 31 Aug 2025 | 3.3 | 15.2 | 18.7 | 35 |
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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