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 Sept 2024 – 30 Sept 2024
Rainfall over this period was 208% of the 10-year average for the same calendar window at this location. Conditions were materially wetter than typical for the time of year.
Rainfall vs 10-yr avg
208%
135 mm vs 65 mm typical
Rain days >5mm
7
typical: 3.7
Frost days
0
typical: 0.0
High-wind days
0
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Sept 2024 | 0.0 | 14.1 | 24.8 | 21 | |
| 2 Sept 2024 | 1.6 | 16.3 | 21.7 | 25 | |
| 3 Sept 2024 | 1.7 | 14.5 | 18.0 | 19 | |
| 4 Sept 2024 | 0.1 | 11.5 | 17.8 | 17 | |
| 5 Sept 2024 | 0.6 | 11.3 | 19.7 | 41 | |
| 6 Sept 2024 | 2.7 | 16.1 | 25.0 | 27 | |
| 7 Sept 2024 | 0.7 | 15.2 | 22.4 | 11 | |
| 8 Sept 2024 | 14.5 | 14.4 | 20.2 | 20 | wet |
| 9 Sept 2024 | 0.5 | 11.7 | 16.2 | 28 | |
| 10 Sept 2024 | 3.1 | 9.7 | 16.6 | 38 | |
| 11 Sept 2024 | 0.8 | 7.4 | 13.8 | 35 | |
| 12 Sept 2024 | 4.9 | 6.9 | 13.3 | 25 | |
| 13 Sept 2024 | 0.0 | 4.3 | 14.9 | 14 | |
| 14 Sept 2024 | 0.0 | 6.5 | 17.8 | 22 | |
| 15 Sept 2024 | 2.8 | 9.3 | 18.8 | 24 | |
| 16 Sept 2024 | 0.0 | 9.2 | 18.3 | 14 | |
| 17 Sept 2024 | 0.0 | 8.4 | 18.3 | 21 | |
| 18 Sept 2024 | 0.0 | 11.1 | 20.8 | 26 | |
| 19 Sept 2024 | 0.0 | 12.5 | 21.1 | 27 | |
| 20 Sept 2024 | 1.7 | 12.6 | 20.5 | 29 | |
| 21 Sept 2024 | 3.0 | 13.7 | 21.8 | 26 | |
| 22 Sept 2024 | 29.4 | 14.0 | 18.7 | 22 | wet |
| 23 Sept 2024 | 15.7 | 14.0 | 17.3 | 22 | wet |
| 24 Sept 2024 | 0.4 | 9.9 | 15.4 | 23 | |
| 25 Sept 2024 | 14.1 | 8.7 | 15.0 | 20 | wet |
| 26 Sept 2024 | 5.2 | 10.4 | 17.0 | 23 | wet |
| 27 Sept 2024 | 10.2 | 6.4 | 12.1 | 38 | wet |
| 28 Sept 2024 | 0.1 | 5.0 | 12.6 | 22 | |
| 29 Sept 2024 | 5.0 | 5.0 | 13.7 | 33 | |
| 30 Sept 2024 | 15.7 | 10.6 | 14.8 | 36 | wet |
7 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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