Daily rainfall, frost and wind for Portsmouth against the 10-year average — the starting point for any weather delay conversation on site.
Weather delay record
PO1 2EG · 1 Feb 2026 – 28 Feb 2026
Rainfall over this period was 220% of the 10-year average for the same calendar window at this location. Conditions were materially wetter than typical for the time of year. 1 day had gusts at or above 47 mph.
Rainfall vs 10-yr avg
220%
158 mm vs 72 mm typical
Rain days >5mm
10
typical: 5.2
Frost days
0
typical: 3.7
High-wind days
1
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Feb 2026 | 28.3 | 6.6 | 9.4 | 21 | wet |
| 2 Feb 2026 | 0.2 | 5.7 | 8.7 | 36 | |
| 3 Feb 2026 | 14.7 | 5.2 | 7.5 | 32 | wet |
| 4 Feb 2026 | 1.2 | 6.4 | 9.9 | 32 | |
| 5 Feb 2026 | 12.3 | 7.3 | 10.1 | 36 | wet |
| 6 Feb 2026 | 12.3 | 8.3 | 10.9 | 29 | wet |
| 7 Feb 2026 | 5.1 | 8.3 | 11.0 | 34 | wet |
| 8 Feb 2026 | 2.7 | 7.3 | 9.3 | 23 | |
| 9 Feb 2026 | 7.9 | 7.9 | 9.8 | 34 | wet |
| 10 Feb 2026 | 3.0 | 7.7 | 10.8 | 27 | |
| 11 Feb 2026 | 4.4 | 8.6 | 11.6 | 37 | |
| 12 Feb 2026 | 0.7 | 6.9 | 11.2 | 35 | |
| 13 Feb 2026 | 1.4 | 5.2 | 9.5 | 29 | |
| 14 Feb 2026 | 0.0 | 1.2 | 6.2 | 30 | |
| 15 Feb 2026 | 12.7 | 4.5 | 9.4 | 39 | wet |
| 16 Feb 2026 | 0.4 | 6.2 | 10.3 | 45 | |
| 17 Feb 2026 | 0.0 | 2.4 | 6.9 | 26 | |
| 18 Feb 2026 | 22.3 | 4.1 | 7.6 | 49 | wet · wind |
| 19 Feb 2026 | 2.7 | 5.5 | 7.9 | 29 | |
| 20 Feb 2026 | 6.3 | 4.8 | 10.8 | 40 | wet |
| 21 Feb 2026 | 2.0 | 8.6 | 12.1 | 32 | |
| 22 Feb 2026 | 4.3 | 9.0 | 11.7 | 34 | |
| 23 Feb 2026 | 0.1 | 8.4 | 12.4 | 35 | |
| 24 Feb 2026 | 0.6 | 10.1 | 12.4 | 27 | |
| 25 Feb 2026 | 0.0 | 9.2 | 13.9 | 21 | |
| 26 Feb 2026 | 1.2 | 9.7 | 11.8 | 43 | |
| 27 Feb 2026 | 9.9 | 9.4 | 12.3 | 36 | wet |
| 28 Feb 2026 | 1.2 | 7.5 | 10.8 | 32 |
10 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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