Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 2063 | 1873 | 2066 | 2006 | 2055 | 2004 |
| Tmin | 2067 | 1873 | 2073 | 2004 | 2058 | 2001 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 155 | 142 | 156 | 151 | 155 | 150 |
| Humidité/Visibilité | 145 | 132 | 144 | 141 | 144 | 140 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 2070 | 2066 | 2005 | 2095 | 2036 | 2095 |
| Tmin | 2075 | 2065 | 2006 | 2095 | 2039 | 2103 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 158 | 157 | 152 | 184 | 180 | 189 |
| Humidité/Visibilité | 140 | 143 | 135 | 170 | 175 | 182 |
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. |
American Falls