| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.40 | 0.39 | 0.01 |
| Feb | 0.57 | 0.59 | -0.02 |
| Mar | 1.03 | 1.03 | 0.00 |
| Apr | 2.07 | 2.07 | 0.00 |
| May | 3.13 | 3.06 | 0.07 |
| Jun | 3.09 | 2.95 | 0.14 |
| Jul | 3.37 | 3.40 | -0.03 |
| Aug | 3.12 | 2.91 | 0.21 |
| Sep | 1.69 | 1.63 | 0.06 |
| Oct | 1.64 | 1.58 | 0.06 |
| Nov | 0.78 | 0.74 | 0.04 |
| Dec | 0.60 | 0.58 | 0.02 |
21.49 | 20.93 | 0.56 |