Daily rainfall, frost and wind for Colchester against the 10-year average — the starting point for any weather delay conversation on site.
Weather delay record
CO1 1PJ · 1 May 2025 – 31 May 2025
Rainfall over this period was 41% 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
41%
24 mm vs 58 mm typical
Rain days >5mm
2
typical: 3.7
Frost days
0
typical: 0.0
High-wind days
0
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 May 2025 | 0.0 | 7.4 | 23.3 | 15 | |
| 2 May 2025 | 0.0 | 11.1 | 21.4 | 18 | |
| 3 May 2025 | 0.0 | 7.4 | 17.5 | 30 | |
| 4 May 2025 | 0.1 | 6.4 | 12.1 | 27 | |
| 5 May 2025 | 1.3 | 4.1 | 12.6 | 33 | |
| 6 May 2025 | 0.1 | 4.9 | 11.9 | 24 | |
| 7 May 2025 | 0.2 | 3.8 | 13.4 | 23 | |
| 8 May 2025 | 0.1 | 6.7 | 14.4 | 20 | |
| 9 May 2025 | 0.0 | 5.4 | 16.1 | 26 | |
| 10 May 2025 | 0.0 | 7.6 | 18.6 | 23 | |
| 11 May 2025 | 0.0 | 9.1 | 20.3 | 23 | |
| 12 May 2025 | 0.9 | 10.2 | 21.8 | 23 | |
| 13 May 2025 | 0.0 | 10.6 | 20.2 | 22 | |
| 14 May 2025 | 0.0 | 7.2 | 19.8 | 25 | |
| 15 May 2025 | 0.0 | 7.9 | 14.0 | 29 | |
| 16 May 2025 | 0.0 | 5.8 | 16.6 | 27 | |
| 17 May 2025 | 0.0 | 8.4 | 19.1 | 21 | |
| 18 May 2025 | 0.0 | 9.1 | 17.1 | 20 | |
| 19 May 2025 | 0.3 | 6.8 | 18.1 | 21 | |
| 20 May 2025 | 0.0 | 7.2 | 20.1 | 20 | |
| 21 May 2025 | 1.1 | 9.0 | 17.8 | 18 | |
| 22 May 2025 | 0.2 | 5.4 | 13.0 | 17 | |
| 23 May 2025 | 0.1 | 3.5 | 17.2 | 24 | |
| 24 May 2025 | 8.8 | 11.9 | 20.7 | 31 | wet |
| 25 May 2025 | 1.5 | 12.9 | 18.3 | 32 | |
| 26 May 2025 | 0.6 | 9.7 | 17.1 | 34 | |
| 27 May 2025 | 5.9 | 12.6 | 16.3 | 33 | wet |
| 28 May 2025 | 1.4 | 13.3 | 18.7 | 29 | |
| 29 May 2025 | 1.3 | 12.7 | 23.4 | 36 | |
| 30 May 2025 | 0.1 | 14.0 | 23.7 | 24 | |
| 31 May 2025 | 0.0 | 14.1 | 24.1 | 23 |
2 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