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 Nov 2025 – 30 Nov 2025
Rainfall over this period was 104% of the 10-year average for the same calendar window at this location. Conditions were broadly in line with typical for the time of year. 1 day had gusts at or above 47 mph.
Rainfall vs 10-yr avg
104%
94 mm vs 90 mm typical
Rain days >5mm
6
typical: 6.2
Frost days
3
typical: 0.5
High-wind days
1
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Nov 2025 | 10.9 | 10.6 | 15.5 | 47 | wet |
| 2 Nov 2025 | 2.3 | 8.8 | 12.5 | 27 | |
| 3 Nov 2025 | 1.8 | 10.3 | 15.1 | 46 | |
| 4 Nov 2025 | 2.0 | 13.6 | 15.9 | 36 | |
| 5 Nov 2025 | 0.9 | 14.7 | 16.3 | 37 | |
| 6 Nov 2025 | 0.1 | 12.5 | 16.1 | 25 | |
| 7 Nov 2025 | 5.2 | 12.5 | 14.4 | 29 | wet |
| 8 Nov 2025 | 0.1 | 9.0 | 14.1 | 17 | |
| 9 Nov 2025 | 0.6 | 7.5 | 13.5 | 36 | |
| 10 Nov 2025 | 16.2 | 10.7 | 13.3 | 37 | wet |
| 11 Nov 2025 | 2.3 | 11.1 | 15.2 | 44 | |
| 12 Nov 2025 | 1.3 | 13.6 | 15.4 | 42 | |
| 13 Nov 2025 | 4.9 | 13.6 | 16.2 | 30 | |
| 14 Nov 2025 | 10.7 | 13.3 | 15.2 | 28 | wet |
| 15 Nov 2025 | 1.0 | 10.5 | 14.5 | 20 | |
| 16 Nov 2025 | 0.0 | 7.1 | 11.3 | 26 | |
| 17 Nov 2025 | 0.0 | 2.6 | 7.7 | 30 | |
| 18 Nov 2025 | 0.1 | 0.6 | 8.2 | 21 | |
| 19 Nov 2025 | 0.8 | 1.1 | 5.4 | 49 | wind |
| 20 Nov 2025 | 0.4 | -0.6 | 4.4 | 29 | frost |
| 21 Nov 2025 | 0.0 | 0.0 | 5.9 | 22 | frost |
| 22 Nov 2025 | 13.3 | 2.5 | 10.6 | 37 | wet |
| 23 Nov 2025 | 4.3 | 6.0 | 11.2 | 36 | |
| 24 Nov 2025 | 0.6 | 5.9 | 8.3 | 30 | |
| 25 Nov 2025 | 0.0 | 3.2 | 7.3 | 28 | |
| 26 Nov 2025 | 0.9 | -0.7 | 10.4 | 25 | frost |
| 27 Nov 2025 | 3.6 | 10.6 | 13.0 | 32 | |
| 28 Nov 2025 | 0.3 | 9.4 | 12.8 | 39 | |
| 29 Nov 2025 | 9.3 | 5.2 | 11.1 | 44 | wet |
| 30 Nov 2025 | 0.0 | 2.5 | 9.8 | 22 |
6 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.
Need this for your exact site and dates?
Run the free tool with your postcode and claim period — print-ready evidence in seconds.
Check your site's dates