Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 53 | 61 | 67 | 59 | 66 | 61 |
| Tmin | 69 | 70 | 72 | 65 | 74 | 66 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 101 | 87 | 93 | 98 | 99 | 116 |
| Humidity/Visibility | 61 | 67 | 73 | 66 | 70 | 67 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 83 | 58 | 52 | 54 | 48 | 45 |
| Tmin | 79 | 56 | 52 | 56 | 49 | 52 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 131 | 125 | 111 | 111 | 139 | 140 |
| Humidity/Visibility | 96 | 106 | 91 | 96 | 90 | 87 |
Climate data is usually derived from meteorological data of a certain number of years. The actual number of recorded years may vary from only a couple to 50 years or more. The quality of climate data depends on the number of available recorded years. Fewer years means less reliable data. The standart-period for reliable climate data is 30 years. For example, the mean monthly temperature for, let's say January, would ideally calculated from a total number of 930 recorded January-days. However, the usual number of recorded days is much smaller. The table above shows the actual number of recorded days for every parameter measured. |
Buffalo