Daily rainfall, frost and wind for Guildford against the 10-year average — the starting point for any weather delay conversation on site.
Weather delay record
GU1 3AA · 1 Sept 2025 – 30 Sept 2025
Rainfall over this period was 92% 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.
Rainfall vs 10-yr avg
92%
59 mm vs 64 mm typical
Rain days >5mm
3
typical: 4.1
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 Sept 2025 | 2.1 | 13.3 | 19.3 | 31 | |
| 2 Sept 2025 | 2.3 | 11.8 | 18.0 | 29 | |
| 3 Sept 2025 | 21.4 | 14.9 | 19.6 | 43 | wet |
| 4 Sept 2025 | 4.9 | 12.6 | 18.8 | 32 | |
| 5 Sept 2025 | 0.1 | 10.3 | 20.0 | 18 | |
| 6 Sept 2025 | 0.0 | 10.9 | 21.4 | 30 | |
| 7 Sept 2025 | 0.0 | 14.7 | 22.8 | 29 | |
| 8 Sept 2025 | 0.6 | 11.7 | 19.1 | 22 | |
| 9 Sept 2025 | 0.2 | 8.7 | 19.2 | 22 | |
| 10 Sept 2025 | 8.8 | 13.0 | 16.8 | 26 | wet |
| 11 Sept 2025 | 2.3 | 11.0 | 17.4 | 34 | |
| 12 Sept 2025 | 0.7 | 10.0 | 17.1 | 32 | |
| 13 Sept 2025 | 8.0 | 10.3 | 16.9 | 29 | wet |
| 14 Sept 2025 | 2.6 | 7.6 | 17.0 | 38 | |
| 15 Sept 2025 | 0.7 | 13.2 | 17.1 | 44 | |
| 16 Sept 2025 | 0.0 | 11.4 | 17.8 | 31 | |
| 17 Sept 2025 | 0.8 | 11.8 | 18.2 | 37 | |
| 18 Sept 2025 | 0.7 | 15.0 | 20.0 | 31 | |
| 19 Sept 2025 | 0.0 | 13.4 | 23.6 | 20 | |
| 20 Sept 2025 | 1.2 | 12.4 | 19.9 | 38 | |
| 21 Sept 2025 | 0.0 | 7.4 | 14.9 | 28 | |
| 22 Sept 2025 | 0.0 | 5.7 | 15.1 | 26 | |
| 23 Sept 2025 | 0.0 | 4.2 | 15.6 | 23 | |
| 24 Sept 2025 | 0.0 | 7.9 | 16.9 | 25 | |
| 25 Sept 2025 | 0.0 | 7.6 | 17.8 | 27 | |
| 26 Sept 2025 | 0.5 | 6.8 | 14.9 | 20 | |
| 27 Sept 2025 | 0.3 | 8.3 | 16.1 | 25 | |
| 28 Sept 2025 | 1.0 | 9.2 | 16.2 | 16 | |
| 29 Sept 2025 | 0.0 | 5.4 | 17.7 | 11 | |
| 30 Sept 2025 | 0.0 | 4.6 | 18.7 | 9 |
3 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.
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