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 2026 – 30 Apr 2026
Rainfall over this period was 22% of the 10-year average for the same calendar window at this location. Conditions were drier than typical for the time of year. 3 days had gusts at or above 47 mph.
Rainfall vs 10-yr avg
22%
10 mm vs 44 mm typical
Rain days >5mm
0
typical: 2.5
Frost days
0
typical: 2.2
High-wind days
3
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Apr 2026 | 0.3 | 6.4 | 12.2 | 20 | |
| 2 Apr 2026 | 0.1 | 4.2 | 11.4 | 21 | |
| 3 Apr 2026 | 0.7 | 6.8 | 15.4 | 48 | wind |
| 4 Apr 2026 | 0.5 | 6.2 | 14.7 | 50 | wind |
| 5 Apr 2026 | 1.3 | 5.0 | 11.0 | 49 | wind |
| 6 Apr 2026 | 0.4 | 1.8 | 13.6 | 19 | |
| 7 Apr 2026 | 0.0 | 4.7 | 17.7 | 26 | |
| 8 Apr 2026 | 0.0 | 6.7 | 21.9 | 15 | |
| 9 Apr 2026 | 0.0 | 6.1 | 16.7 | 37 | |
| 10 Apr 2026 | 0.0 | 4.4 | 11.3 | 23 | |
| 11 Apr 2026 | 0.4 | 7.1 | 11.1 | 40 | |
| 12 Apr 2026 | 1.7 | 6.0 | 12.5 | 39 | |
| 13 Apr 2026 | 0.4 | 2.4 | 12.9 | 19 | |
| 14 Apr 2026 | 0.0 | 2.8 | 15.8 | 33 | |
| 15 Apr 2026 | 1.8 | 9.8 | 16.8 | 41 | |
| 16 Apr 2026 | 0.2 | 8.7 | 15.6 | 28 | |
| 17 Apr 2026 | 0.4 | 8.9 | 16.6 | 35 | |
| 18 Apr 2026 | 0.1 | 6.4 | 15.3 | 25 | |
| 19 Apr 2026 | 0.1 | 4.6 | 13.0 | 20 | |
| 20 Apr 2026 | 0.0 | 3.4 | 12.7 | 21 | |
| 21 Apr 2026 | 0.0 | 4.7 | 14.0 | 33 | |
| 22 Apr 2026 | 0.0 | 3.9 | 15.9 | 33 | |
| 23 Apr 2026 | 0.0 | 3.6 | 16.3 | 23 | |
| 24 Apr 2026 | 0.0 | 2.0 | 17.4 | 19 | |
| 25 Apr 2026 | 0.0 | 3.1 | 19.7 | 22 | |
| 26 Apr 2026 | 0.0 | 4.9 | 18.4 | 16 | |
| 27 Apr 2026 | 0.6 | 7.6 | 20.4 | 24 | |
| 28 Apr 2026 | 0.5 | 7.6 | 13.4 | 34 | |
| 29 Apr 2026 | 0.0 | 6.4 | 17.1 | 38 | |
| 30 Apr 2026 | 0.0 | 7.7 | 20.1 | 31 |
0 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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