Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 62 | 40 | 54 | 66 | 74 | 82 |
| Tmin | 61 | 43 | 57 | 77 | 74 | 85 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 159 | 145 | 164 | 195 | 184 | 181 |
| Humidity/Visibility | 42 | 30 | 38 | 51 | 51 | 48 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 69 | 79 | 52 | 46 | 60 | 59 |
| Tmin | 75 | 82 | 67 | 56 | 61 | 55 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 172 | 184 | 152 | 144 | 180 | 192 |
| Humidity/Visibility | 49 | 54 | 38 | 37 | 45 | 41 |
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. |
Dunmore Town