| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) | 
|---|---|---|---|
| Jan | 3.41 | 3.61 | -0.20 | 
| Feb | 2.91 | 3.00 | -0.09 | 
| Mar | 4.14 | 4.25 | -0.11 | 
| Apr | 3.87 | 4.03 | -0.16 | 
| May | 3.88 | 4.00 | -0.12 | 
| Jun | 4.34 | 4.57 | -0.23 | 
| Jul | 4.42 | 4.53 | -0.11 | 
| Aug | 4.26 | 4.41 | -0.15 | 
| Sep | 4.03 | 4.19 | -0.16 | 
| Oct | 4.12 | 4.17 | -0.05 | 
| Nov | 3.39 | 3.37 | 0.02 | 
| Dec | 4.22 | 4.37 | -0.15 | 
| 46.99 | 48.50 | -1.51 |