| Lebanon NH Airport Normals based on FAA Observations 1961-1990 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Temperature Normals | |||||||||||||
| Daily Maximum | 28.0 | 31.6 | 41.7 | 54.4 | 67.6 | 76.3 | 81.2 | 78.5 | 69.9 | 58.5 | 44.8 | 31.8 | 55.4 |
| Daily Minimum | 5.7 | 8.4 | 20.8 | 31.6 | 42.3 | 51.7 | 56.8 | 55.3 | 47.2 | 36.4 | 28.1 | 13.8 | 33.2 |
| Monthly | 16.9 | 20.1 | 31.2 | 43.0 | 55.0 | 64.0 | 69.0 | 66.9 | 58.6 | 47.5 | 36.5 | 22.8 | 44.3 |
| Degree Day Normals | |||||||||||||
| Heating (base 65f) | 1491 | 1257 | 1048 | 660 | 321 | 73 | 16 | 47 | 206 | 543 | 855 | 1308 | 7825 |
| Cooling (base 65f) | 0 | 0 | 0 | 0 | 11 | 43 | 140 | 105 | 14 | 0 | 0 | 0 | 313 |
| Precipitation normals | |||||||||||||
| (water equivalent) | 2.48 | 2.13 | 2.40 | 2.71 | 3.44 | 3.00 | 3.11 | 3.56 | 3.18 | 3.18 | 3.40 | 2.98 | 35.57 |
| Snowfall | 18.3 | 17.8 | 13.2 | 3.6 | 0.1 | 0 | 0 | 0 | 0 | 0.3 | 5.3 | 17.7 | 76.3 |
Created 3/97 ES