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 Mar 2025 – 31 Mar 2025
Rainfall over this period was 17% of the 10-year average for the same calendar window at this location. Conditions were drier than typical for the time of year.
Rainfall vs 10-yr avg
17%
13 mm vs 75 mm typical
Rain days >5mm
1
typical: 5.2
Frost days
0
typical: 2.2
High-wind days
0
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Mar 2025 | 0.0 | 1.0 | 9.0 | 17 | |
| 2 Mar 2025 | 0.0 | 1.1 | 8.6 | 16 | |
| 3 Mar 2025 | 0.0 | 0.2 | 10.6 | 16 | |
| 4 Mar 2025 | 0.0 | 0.1 | 10.0 | 14 | |
| 5 Mar 2025 | 0.0 | 0.8 | 10.8 | 12 | |
| 6 Mar 2025 | 0.0 | 5.6 | 12.1 | 22 | |
| 7 Mar 2025 | 0.3 | 9.6 | 12.3 | 24 | |
| 8 Mar 2025 | 0.0 | 8.1 | 13.3 | 26 | |
| 9 Mar 2025 | 0.0 | 8.4 | 14.1 | 24 | |
| 10 Mar 2025 | 0.4 | 8.6 | 15.1 | 28 | |
| 11 Mar 2025 | 0.4 | 5.1 | 8.7 | 29 | |
| 12 Mar 2025 | 1.2 | 2.8 | 8.3 | 20 | |
| 13 Mar 2025 | 0.0 | 1.5 | 7.7 | 28 | |
| 14 Mar 2025 | 0.2 | 0.3 | 8.6 | 21 | |
| 15 Mar 2025 | 0.0 | 1.3 | 7.6 | 32 | |
| 16 Mar 2025 | 0.0 | 0.1 | 9.0 | 27 | |
| 17 Mar 2025 | 0.2 | 3.6 | 8.5 | 28 | |
| 18 Mar 2025 | 0.0 | 3.6 | 10.2 | 32 | |
| 19 Mar 2025 | 0.0 | 3.7 | 12.8 | 18 | |
| 20 Mar 2025 | 0.0 | 7.5 | 15.8 | 24 | |
| 21 Mar 2025 | 1.7 | 9.7 | 13.4 | 32 | |
| 22 Mar 2025 | 0.0 | 9.3 | 12.8 | 22 | |
| 23 Mar 2025 | 7.1 | 8.6 | 13.9 | 23 | wet |
| 24 Mar 2025 | 0.0 | 5.9 | 12.2 | 24 | |
| 25 Mar 2025 | 0.1 | 4.7 | 14.8 | 18 | |
| 26 Mar 2025 | 0.0 | 6.8 | 13.2 | 17 | |
| 27 Mar 2025 | 0.0 | 6.0 | 11.4 | 19 | |
| 28 Mar 2025 | 1.0 | 6.5 | 13.1 | 31 | |
| 29 Mar 2025 | 0.0 | 3.1 | 11.3 | 31 | |
| 30 Mar 2025 | 0.0 | 8.7 | 15.4 | 30 | |
| 31 Mar 2025 | 0.0 | 5.6 | 13.4 | 19 |
1 day 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