Weather delay tool
Weather record

Construction weather in Portsmouth, July 2026

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

Portsmouth — 1 Jul 2026 to 31 Jul 2026

PO1 2EG · 1 Jul 2026 – 31 Jul 2026

Rainfall over this period was 2% 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

2%

2 mm vs 62 mm typical

Rain days >5mm

0

typical: 3.4

Frost days

0

typical: 0.0

High-wind days

0

gusts ≥ 47 mph

Daily record

DateRain (mm)Min °CMax °CGust (mph)Flags
1 Jul 20260.114.423.923
2 Jul 20260.216.525.230
3 Jul 20260.013.322.227
4 Jul 20260.015.325.227
5 Jul 20260.015.524.828
6 Jul 20260.015.626.726
7 Jul 20260.016.729.324
8 Jul 20260.019.727.322
9 Jul 20260.019.027.619
10 Jul 20260.020.428.321
11 Jul 20260.019.129.526
12 Jul 20260.016.729.936
13 Jul 20260.015.427.938
14 Jul 20260.016.429.128
15 Jul 20260.018.428.334
16 Jul 20260.117.128.123
17 Jul 20260.116.826.329
18 Jul 20260.016.625.120
19 Jul 20260.014.123.025
20 Jul 20260.013.023.219
21 Jul 20260.015.424.417
22 Jul 20260.016.824.522
23 Jul 20260.017.122.721
24 Jul 20260.016.225.823
25 Jul 20260.016.026.329
26 Jul 20260.818.125.134
27 Jul 20260.015.626.428
28 Jul 20260.017.824.623
29 Jul 20260.017.728.229
30 Jul 20260.216.525.228
31 Jul 20260.016.024.522

0 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