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 Apr 2025 – 30 Apr 2025
Rainfall over this period was 50% 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
50%
23 mm vs 47 mm typical
Rain days >5mm
1
typical: 3.1
Frost days
0
typical: 2.8
High-wind days
1
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Apr 2025 | 0.0 | 3.3 | 13.5 | 29 | |
| 2 Apr 2025 | 0.0 | 4.3 | 14.6 | 36 | |
| 3 Apr 2025 | 0.0 | 5.9 | 17.3 | 30 | |
| 4 Apr 2025 | 0.0 | 8.8 | 19.7 | 28 | |
| 5 Apr 2025 | 0.0 | 4.9 | 15.8 | 31 | |
| 6 Apr 2025 | 0.0 | 3.2 | 14.5 | 25 | |
| 7 Apr 2025 | 0.0 | 1.5 | 13.9 | 18 | |
| 8 Apr 2025 | 0.0 | 1.6 | 13.4 | 16 | |
| 9 Apr 2025 | 0.0 | 2.4 | 12.9 | 24 | |
| 10 Apr 2025 | 0.0 | 2.2 | 13.5 | 16 | |
| 11 Apr 2025 | 0.0 | 3.9 | 19.5 | 13 | |
| 12 Apr 2025 | 0.0 | 6.9 | 20.7 | 18 | |
| 13 Apr 2025 | 0.3 | 7.1 | 14.2 | 30 | |
| 14 Apr 2025 | 0.9 | 5.0 | 13.3 | 34 | |
| 15 Apr 2025 | 4.5 | 8.2 | 14.9 | 27 | |
| 16 Apr 2025 | 1.6 | 5.4 | 13.2 | 53 | wind |
| 17 Apr 2025 | 0.3 | 3.2 | 15.3 | 21 | |
| 18 Apr 2025 | 2.2 | 7.8 | 13.5 | 35 | |
| 19 Apr 2025 | 1.5 | 8.4 | 16.7 | 31 | |
| 20 Apr 2025 | 0.2 | 4.2 | 15.2 | 25 | |
| 21 Apr 2025 | 1.6 | 8.2 | 14.3 | 25 | |
| 22 Apr 2025 | 0.0 | 5.7 | 15.0 | 28 | |
| 23 Apr 2025 | 9.0 | 7.4 | 13.6 | 31 | wet |
| 24 Apr 2025 | 0.0 | 6.4 | 14.4 | 18 | |
| 25 Apr 2025 | 0.7 | 4.5 | 14.5 | 16 | |
| 26 Apr 2025 | 0.3 | 7.3 | 16.9 | 14 | |
| 27 Apr 2025 | 0.0 | 7.4 | 19.2 | 18 | |
| 28 Apr 2025 | 0.0 | 7.4 | 20.9 | 13 | |
| 29 Apr 2025 | 0.0 | 8.3 | 23.3 | 18 | |
| 30 Apr 2025 | 0.0 | 8.2 | 24.8 | 14 |
1 day 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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