| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.37 | 0.31 | 0.06 |
| Feb | 0.58 | 0.54 | 0.04 |
| Mar | 0.99 | 0.91 | 0.08 |
| Apr | 2.26 | 2.18 | 0.08 |
| May | 3.31 | 3.39 | -0.08 |
| Jun | 3.52 | 3.75 | -0.23 |
| Jul | 3.22 | 3.21 | 0.01 |
| Aug | 2.60 | 2.57 | 0.03 |
| Sep | 1.56 | 1.55 | 0.01 |
| Oct | 1.67 | 1.66 | 0.01 |
| Nov | 0.57 | 0.51 | 0.06 |
| Dec | 0.44 | 0.39 | 0.05 |
21.09 | 20.97 | 0.12 |