| Average Precipitation mm (in) | 37.9 (1.49) | 30.4 (1.2) | 34.9 (1.4) | 33.1 (1.3) | 37.5 (1.5) | 57.6 (2.3) | 77.8 (3.1) | 80.7 (3.2) | 69.7 (2.7) | 67 (2.6) | 55.6 (2.2) | 50.5 (2) | | 632.7 (24.9) |
| Precipitation Litres/m² (Gallons/ft²) | 37.9 (0.93) | 30.4 (0.75) | 34.9 (0.86) | 33.1 (0.81) | 37.5 (0.92) | 57.6 (1.41) | 77.8 (1.91) | 80.7 (1.98) | 69.7 (1.71) | 67 (1.64) | 55.6 (1.36) | 50.5 (1.24) | | 632.7 (15.52) |
| Number of Wet Days (probability of rain on a day) | 17 (55%) | 15 (53%) | 13 (42%) | 11 (37%) | 12 (39%) | 12 (40%) | 13 (42%) | 15 (48%) | 14 (47%) | 15 (48%) | 17 (57%) | 18 (58%) | | 172 (47%) |
| Percentage of Sunny (Cloudy) Daylight Hours | 8 (92) | 14 (86) | 31 (69) | 38 (62) | 49 (51) | 46 (54) | 51 (49) | 45 (55) | 34 (66) | 22 (78) | 10 (90) | 5 (95) | | 36 (64) |