| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 3.62 | 3.74 | -0.12 |
| Feb | 2.88 | 3.01 | -0.13 |
| Mar | 3.85 | 4.08 | -0.23 |
| Apr | 3.76 | 3.96 | -0.20 |
| May | 3.86 | 3.85 | 0.01 |
| Jun | 4.33 | 4.30 | 0.03 |
| Jul | 4.14 | 4.08 | 0.06 |
| Aug | 4.18 | 4.23 | -0.05 |
| Sep | 4.50 | 4.67 | -0.17 |
| Oct | 3.42 | 3.36 | 0.06 |
| Nov | 3.23 | 3.33 | -0.10 |
| Dec | 3.44 | 3.54 | -0.10 |
45.21 | 46.15 | -0.94 |