| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 3.69 | 3.83 | -0.14 |
| Feb | 3.03 | 2.98 | 0.05 |
| Mar | 4.02 | 3.87 | 0.15 |
| Apr | 4.28 | 4.50 | -0.22 |
| May | 4.58 | 4.78 | -0.20 |
| Jun | 4.63 | 5.31 | -0.68 |
| Jul | 4.57 | 4.59 | -0.02 |
| Aug | 4.14 | 4.09 | 0.05 |
| Sep | 4.21 | 4.57 | -0.36 |
| Oct | 3.45 | 3.26 | 0.19 |
| Nov | 3.38 | 3.53 | -0.15 |
| Dec | 3.53 | 3.67 | -0.14 |
47.51 | 48.98 | -1.47 |