| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.40 | 0.43 | -0.03 |
| Feb | 0.59 | 0.50 | 0.09 |
| Mar | 0.87 | 0.80 | 0.07 |
| Apr | 1.90 | 1.81 | 0.09 |
| May | 3.01 | 3.12 | -0.11 |
| Jun | 3.26 | 3.47 | -0.21 |
| Jul | 2.43 | 2.37 | 0.06 |
| Aug | 1.97 | 1.88 | 0.09 |
| Sep | 1.53 | 1.67 | -0.14 |
| Oct | 1.55 | 1.52 | 0.03 |
| Nov | 0.53 | 0.47 | 0.06 |
| Dec | 0.46 | 0.43 | 0.03 |
18.50 | 18.47 | 0.03 |