Daily rainfall, frost and wind for Swindon against the 10-year average — the starting point for any weather delay conversation on site.
Weather delay record
SN1 1LD · 1 Jan 2025 – 31 Jan 2025
Rainfall over this period was 143% of the 10-year average for the same calendar window at this location. Conditions were materially wetter than typical for the time of year. 3 days had gusts at or above 47 mph.
Rainfall vs 10-yr avg
143%
99 mm vs 69 mm typical
Rain days >5mm
8
typical: 4.5
Frost days
8
typical: 11.6
High-wind days
3
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Jan 2025 | 12.6 | 3.5 | 10.9 | 49 | wet · wind |
| 2 Jan 2025 | 0.0 | -1.2 | 2.9 | 13 | frost |
| 3 Jan 2025 | 0.0 | -2.3 | 3.6 | 14 | frost |
| 4 Jan 2025 | 5.0 | -2.0 | 2.8 | 27 | frost |
| 5 Jan 2025 | 11.5 | 0.5 | 11.7 | 42 | wet |
| 6 Jan 2025 | 8.5 | 1.4 | 11.3 | 42 | wet |
| 7 Jan 2025 | 2.0 | -0.4 | 4.2 | 23 | frost |
| 8 Jan 2025 | 1.6 | -2.1 | 1.3 | 18 | frost |
| 9 Jan 2025 | 0.0 | -4.0 | 2.9 | 18 | frost |
| 10 Jan 2025 | 0.0 | -4.2 | 0.8 | 14 | frost |
| 11 Jan 2025 | 0.0 | -4.6 | 2.0 | 11 | frost |
| 12 Jan 2025 | 0.0 | 0.3 | 5.6 | 16 | |
| 13 Jan 2025 | 0.0 | 1.0 | 5.1 | 25 | |
| 14 Jan 2025 | 0.0 | 2.3 | 8.5 | 21 | |
| 15 Jan 2025 | 0.0 | 2.3 | 8.1 | 13 | |
| 16 Jan 2025 | 0.0 | 1.2 | 7.2 | 17 | |
| 17 Jan 2025 | 0.0 | 1.8 | 6.7 | 17 | |
| 18 Jan 2025 | 0.0 | 0.8 | 3.9 | 10 | |
| 19 Jan 2025 | 0.0 | 1.1 | 2.9 | 16 | |
| 20 Jan 2025 | 0.0 | 0.7 | 6.7 | 16 | |
| 21 Jan 2025 | 0.0 | 0.9 | 5.3 | 16 | |
| 22 Jan 2025 | 1.3 | 0.7 | 4.6 | 12 | |
| 23 Jan 2025 | 5.5 | 0.3 | 7.0 | 37 | wet |
| 24 Jan 2025 | 9.8 | 6.4 | 10.7 | 55 | wet · wind |
| 25 Jan 2025 | 2.9 | 0.7 | 6.5 | 22 | |
| 26 Jan 2025 | 14.8 | 2.7 | 7.7 | 53 | wet · wind |
| 27 Jan 2025 | 11.2 | 5.4 | 7.3 | 47 | wet |
| 28 Jan 2025 | 4.9 | 5.7 | 8.7 | 44 | |
| 29 Jan 2025 | 0.0 | 2.6 | 6.6 | 24 | |
| 30 Jan 2025 | 0.0 | 0.8 | 7.0 | 21 | |
| 31 Jan 2025 | 6.9 | 1.8 | 8.7 | 26 | wet |
8 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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