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 Jan 2026 – 31 Jan 2026
Rainfall over this period was 176% of the 10-year average for the same calendar window at this location. Conditions were materially wetter than typical for the time of year. 2 days had gusts at or above 47 mph.
Rainfall vs 10-yr avg
176%
177 mm vs 100 mm typical
Rain days >5mm
12
typical: 7.5
Frost days
5
typical: 6.0
High-wind days
2
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Jan 2026 | 0.0 | 3.5 | 7.2 | 29 | |
| 2 Jan 2026 | 0.3 | 1.1 | 5.1 | 28 | |
| 3 Jan 2026 | 0.0 | -0.6 | 4.5 | 22 | frost |
| 4 Jan 2026 | 0.0 | -1.5 | 4.0 | 17 | frost |
| 5 Jan 2026 | 0.0 | -2.8 | 3.0 | 13 | frost |
| 6 Jan 2026 | 1.7 | -3.5 | 6.6 | 33 | frost |
| 7 Jan 2026 | 1.1 | 3.1 | 7.1 | 30 | |
| 8 Jan 2026 | 16.4 | 2.5 | 6.3 | 46 | wet |
| 9 Jan 2026 | 2.6 | 2.6 | 5.6 | 44 | |
| 10 Jan 2026 | 0.1 | 0.1 | 6.2 | 18 | |
| 11 Jan 2026 | 13.4 | 3.7 | 11.4 | 44 | wet |
| 12 Jan 2026 | 2.0 | 8.8 | 10.6 | 31 | |
| 13 Jan 2026 | 3.2 | 3.3 | 10.0 | 22 | |
| 14 Jan 2026 | 1.9 | -2.9 | 6.6 | 17 | frost |
| 15 Jan 2026 | 5.4 | 3.8 | 7.8 | 29 | wet |
| 16 Jan 2026 | 3.2 | 3.4 | 9.0 | 26 | |
| 17 Jan 2026 | 0.7 | 4.9 | 9.1 | 17 | |
| 18 Jan 2026 | 6.5 | 5.5 | 6.2 | 17 | wet |
| 19 Jan 2026 | 1.0 | 4.3 | 7.1 | 16 | |
| 20 Jan 2026 | 15.2 | 5.6 | 8.6 | 53 | wet · wind |
| 21 Jan 2026 | 8.2 | 4.5 | 10.6 | 41 | wet |
| 22 Jan 2026 | 10.8 | 6.1 | 9.5 | 23 | wet |
| 23 Jan 2026 | 13.5 | 4.8 | 8.8 | 49 | wet · wind |
| 24 Jan 2026 | 15.3 | 6.3 | 8.0 | 47 | wet |
| 25 Jan 2026 | 0.7 | 5.0 | 8.5 | 28 | |
| 26 Jan 2026 | 6.4 | 4.1 | 7.7 | 38 | wet |
| 27 Jan 2026 | 29.9 | 6.1 | 10.1 | 47 | wet |
| 28 Jan 2026 | 0.7 | 4.1 | 8.1 | 24 | |
| 29 Jan 2026 | 4.9 | 4.9 | 8.1 | 33 | |
| 30 Jan 2026 | 8.3 | 6.3 | 9.6 | 44 | wet |
| 31 Jan 2026 | 3.5 | 5.9 | 9.4 | 40 |
12 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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