Weather delay tool
Weather record

Construction weather in London, April 2026

Daily rainfall, frost and wind for London against the 10-year average — the starting point for any weather delay conversation on site.

Weather delay record

London — 1 Apr 2026 to 30 Apr 2026

EC1A 1BB · 1 Apr 2026 – 30 Apr 2026

Rainfall over this period was 20% 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

20%

7 mm vs 37 mm typical

Rain days >5mm

0

typical: 2.0

Frost days

0

typical: 2.2

High-wind days

0

gusts ≥ 47 mph

Daily record

DateRain (mm)Min °CMax °CGust (mph)Flags
1 Apr 20260.18.813.714
2 Apr 20260.05.510.623
3 Apr 20261.57.616.039
4 Apr 20260.47.914.341
5 Apr 20260.47.313.241
6 Apr 20260.03.114.919
7 Apr 20260.06.620.323
8 Apr 20260.09.825.917
9 Apr 20260.29.121.135
10 Apr 20260.06.512.922
11 Apr 20260.38.612.837
12 Apr 20260.37.915.134
13 Apr 20261.04.713.323
14 Apr 20260.05.416.528
15 Apr 20261.011.417.039
16 Apr 20260.510.217.427
17 Apr 20260.710.917.730
18 Apr 20260.19.616.821
19 Apr 20260.06.515.720
20 Apr 20260.05.813.424
21 Apr 20260.05.914.134
22 Apr 20260.06.716.534
23 Apr 20260.07.218.125
24 Apr 20260.04.719.222
25 Apr 20260.04.721.615
26 Apr 20260.07.519.519
27 Apr 20260.68.021.623
28 Apr 20260.49.217.436
29 Apr 20260.08.417.939
30 Apr 20260.010.820.929

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