| Average Precipitation mm (in) | 5 (0.2) | 3 (0.1) | 2 (0.1) | 18 (0.7) | 89 (3.5) | 246 (9.7) | 389 (15.3) | 366 (14.4) | 221 (8.7) | 64 (2.5) | 28 (1.1) | 10 (0.4) | | 1441 (56.7) |
| Precipitation Litres/m² (Gallons/ft²) | 5 (0.12) | 3 (0.07) | 2 (0.05) | 18 (0.44) | 89 (2.18) | 246 (6.03) | 389 (9.54) | 366 (8.98) | 221 (5.42) | 64 (1.57) | 28 (0.69) | 10 (0.25) | | 1441 (35.34) |
| Number of Wet Days (probability of rain on a day) | 1 (3%) | 1 (3%) | 1 (3%) | 4 (13%) | 8 (27%) | 15 (48%) | 17 (55%) | 17 (60%) | 11 (35%) | 7 (23%) | 4 (13%) | 2 (7%) | | 88 (24%) |
| Percentage of Sunny (Cloudy) Daylight Hours | 81 (19) | 84 (16) | 83 (17) | 76 (24) | 68 (32) | 53 (47) | 49 (51) | 51 (49) | 60 (40) | 73 (27) | 77 (23) | 78 (22) | | 70 (30) |