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 Jan 2026 – 31 Jan 2026
Rainfall over this period was 185% 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
185%
101 mm vs 54 mm typical
Rain days >5mm
7
typical: 3.7
Frost days
8
typical: 9.6
High-wind days
0
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Jan 2026 | 0.0 | 0.5 | 5.4 | 31 | |
| 2 Jan 2026 | 0.3 | -1.2 | 2.3 | 28 | frost |
| 3 Jan 2026 | 0.0 | -2.2 | 1.2 | 27 | frost |
| 4 Jan 2026 | 0.0 | -3.7 | 1.5 | 19 | frost |
| 5 Jan 2026 | 0.4 | -4.1 | 0.5 | 21 | frost |
| 6 Jan 2026 | 2.4 | -4.6 | 2.9 | 34 | frost |
| 7 Jan 2026 | 2.4 | 0.5 | 5.2 | 33 | |
| 8 Jan 2026 | 14.0 | 1.2 | 3.1 | 35 | wet |
| 9 Jan 2026 | 7.4 | 1.3 | 3.5 | 37 | wet |
| 10 Jan 2026 | 0.0 | -2.0 | 2.5 | 23 | frost |
| 11 Jan 2026 | 2.8 | -1.6 | 8.9 | 43 | frost |
| 12 Jan 2026 | 0.4 | 7.9 | 10.3 | 39 | |
| 13 Jan 2026 | 1.7 | 3.8 | 9.8 | 22 | |
| 14 Jan 2026 | 3.7 | -2.0 | 7.2 | 18 | frost |
| 15 Jan 2026 | 19.3 | 5.2 | 7.5 | 27 | wet |
| 16 Jan 2026 | 1.7 | 1.5 | 7.9 | 18 | |
| 17 Jan 2026 | 3.2 | 3.9 | 8.9 | 16 | |
| 18 Jan 2026 | 3.0 | 4.8 | 8.7 | 17 | |
| 19 Jan 2026 | 0.4 | 5.7 | 9.1 | 18 | |
| 20 Jan 2026 | 2.0 | 6.8 | 9.5 | 37 | |
| 21 Jan 2026 | 6.0 | 4.3 | 9.2 | 34 | wet |
| 22 Jan 2026 | 6.8 | 6.6 | 9.0 | 28 | wet |
| 23 Jan 2026 | 0.9 | 5.1 | 7.3 | 31 | |
| 24 Jan 2026 | 2.5 | 4.7 | 8.5 | 32 | |
| 25 Jan 2026 | 1.3 | 4.2 | 6.3 | 30 | |
| 26 Jan 2026 | 0.0 | 2.6 | 4.9 | 27 | |
| 27 Jan 2026 | 11.0 | 4.2 | 7.9 | 40 | wet |
| 28 Jan 2026 | 0.6 | 0.7 | 7.2 | 23 | |
| 29 Jan 2026 | 0.2 | 0.4 | 5.2 | 24 | |
| 30 Jan 2026 | 5.5 | 2.9 | 9.0 | 30 | wet |
| 31 Jan 2026 | 0.7 | 4.3 | 9.0 | 26 |
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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