| Average Precipitation mm (in) | 0.5 (0.02) | 0.7 (0) | 2 (0.1) | 5.2 (0.2) | 26.6 (1) | 72.3 (2.8) | 119.4 (4.7) | 122.6 (4.8) | 58.3 (2.3) | 10.2 (0.4) | 1.7 (0.1) | 1 (0) | | 420.5 (16.6) |
| Precipitation Litres/m² (Gallons/ft²) | 0.5 (0.01) | 0.7 (0.02) | 2 (0.05) | 5.2 (0.13) | 26.6 (0.65) | 72.3 (1.77) | 119.4 (2.93) | 122.6 (3.01) | 58.3 (1.43) | 10.2 (0.25) | 1.7 (0.04) | 1 (0.02) | | 420.5 (10.31) |
| Number of Wet Days (probability of rain on a day) | 0 (0%) | 0.5 (2%) | 1 (3%) | 0.5 (2%) | 3 (10%) | 8 (27%) | 13 (42%) | 10 (32%) | 7 (23%) | 2 (6%) | 0.5 (2%) | 0 (0%) | | 45.5 (12%) |