| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 3.59 | 3.75 | -0.16 |
| Feb | 4.29 | 4.25 | 0.04 |
| Mar | 4.73 | 4.71 | 0.02 |
| Apr | 4.92 | 5.00 | -0.08 |
| May | 5.16 | 5.29 | -0.13 |
| Jun | 4.44 | 4.48 | -0.04 |
| Jul | 4.30 | 4.62 | -0.32 |
| Aug | 3.59 | 3.57 | 0.02 |
| Sep | 3.80 | 3.61 | 0.19 |
| Oct | 3.86 | 3.98 | -0.12 |
| Nov | 3.78 | 3.79 | -0.01 |
| Dec | 4.57 | 4.69 | -0.12 |
51.03 | 51.74 | -0.71 |