| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) | 
|---|---|---|---|
| Jan | 0.77 | 0.74 | 0.03 | 
| Feb | 0.80 | 0.83 | -0.03 | 
| Mar | 1.52 | 1.49 | 0.03 | 
| Apr | 2.78 | 2.81 | -0.03 | 
| May | 4.05 | 3.95 | 0.10 | 
| Jun | 4.27 | 4.31 | -0.04 | 
| Jul | 4.39 | 4.26 | 0.13 | 
| Aug | 4.02 | 4.04 | -0.02 | 
| Sep | 3.39 | 3.24 | 0.15 | 
| Oct | 2.85 | 2.84 | 0.01 | 
| Nov | 1.61 | 1.56 | 0.05 | 
| Dec | 1.09 | 1.08 | 0.01 | 
| 31.54 | 31.15 | 0.39 |