Daily rainfall, frost and wind for Northampton against the 10-year average — the starting point for any weather delay conversation on site.
Weather delay record
NN1 1DE · 1 Apr 2025 – 30 Apr 2025
Rainfall over this period was 39% 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
39%
17 mm vs 44 mm typical
Rain days >5mm
1
typical: 2.5
Frost days
0
typical: 2.2
High-wind days
1
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Apr 2025 | 0.0 | 2.5 | 13.0 | 26 | |
| 2 Apr 2025 | 0.0 | 4.3 | 14.6 | 31 | |
| 3 Apr 2025 | 0.0 | 5.9 | 16.5 | 26 | |
| 4 Apr 2025 | 0.0 | 7.1 | 19.0 | 27 | |
| 5 Apr 2025 | 0.0 | 4.7 | 14.4 | 30 | |
| 6 Apr 2025 | 0.0 | 3.5 | 13.8 | 22 | |
| 7 Apr 2025 | 0.0 | 1.6 | 13.1 | 18 | |
| 8 Apr 2025 | 0.0 | 2.0 | 13.7 | 15 | |
| 9 Apr 2025 | 0.0 | 2.7 | 12.4 | 22 | |
| 10 Apr 2025 | 0.0 | 5.4 | 14.3 | 17 | |
| 11 Apr 2025 | 0.0 | 5.2 | 20.3 | 13 | |
| 12 Apr 2025 | 0.0 | 5.8 | 21.0 | 21 | |
| 13 Apr 2025 | 0.8 | 7.2 | 14.3 | 25 | |
| 14 Apr 2025 | 0.0 | 4.1 | 13.8 | 31 | |
| 15 Apr 2025 | 2.9 | 8.2 | 12.7 | 21 | |
| 16 Apr 2025 | 0.1 | 6.9 | 13.5 | 49 | wind |
| 17 Apr 2025 | 0.1 | 3.2 | 15.1 | 17 | |
| 18 Apr 2025 | 0.0 | 6.5 | 16.3 | 34 | |
| 19 Apr 2025 | 0.3 | 6.5 | 14.8 | 31 | |
| 20 Apr 2025 | 0.0 | 4.6 | 14.6 | 23 | |
| 21 Apr 2025 | 2.5 | 8.0 | 12.6 | 15 | |
| 22 Apr 2025 | 0.0 | 5.4 | 15.5 | 23 | |
| 23 Apr 2025 | 10.5 | 8.2 | 13.3 | 31 | wet |
| 24 Apr 2025 | 0.0 | 6.8 | 12.8 | 19 | |
| 25 Apr 2025 | 0.0 | 3.7 | 14.5 | 15 | |
| 26 Apr 2025 | 0.2 | 5.4 | 15.4 | 14 | |
| 27 Apr 2025 | 0.0 | 7.9 | 19.3 | 20 | |
| 28 Apr 2025 | 0.0 | 7.9 | 20.8 | 15 | |
| 29 Apr 2025 | 0.0 | 9.2 | 22.0 | 20 | |
| 30 Apr 2025 | 0.0 | 7.2 | 23.7 | 13 |
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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