Mesonet Rainfall by Month Table
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Washington (WASH) rainfall in inches per month
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Total |
| 30-Year Normal | 1.50 | 1.98 | 3.21 | 3.59 | 5.70 | 4.37 | 2.59 | 2.56 | 4.06 | 3.95 | 2.55 | 2.28 | 38.35
|
| Mesonet Average | 1.49 | 1.61 | 2.59 | 3.43 | 3.82 | 4.37 | 3.15 | 3.14 | 3.51 | 3.34 | 1.60 | 1.67 | 33.72 |
| 1994 | * | * | * | 3.37 | 4.12 | 1.03 | 4.52 | 2.38 | 3.55 | 5.54 | 2.71 | 0.71 | * |
| 1995 | * | * | * | * | * | 4.30 | 1.43 | 1.78 | 4.96 | 0.73 | 0.64 | 2.83 | * |
| 1996 | 0.45 | 0.00 | 2.53 | 2.31 | 1.58 | 8.45 | 8.45 | 6.01 | 4.73 | 1.12 | * | 0.06 | * |
| 1997 | 0.18 | 3.54 | 0.44 | 5.94 | 6.24 | 2.78 | 0.20 | 4.22 | 3.32 | 3.53 | 2.33 | 4.33 | 37.05 |
| 1998 | 5.34 | 1.26 | 5.96 | 4.22 | 1.14 | 0.87 | 0.07 | 0.48 | 4.48 | 2.88 | 3.08 | 1.43 | 31.21 |
| 1999 | 1.97 | 0.91 | 3.93 | 5.90 | * | 6.86 | 1.17 | 0.95 | 4.14 | 2.57 | 0.14 | 3.43 | * |
| 2000 | 1.05 | 1.70 | 2.87 | 2.65 | 2.31 | 7.28 | 4.46 | 0.00 | 1.31 | 9.66 | 4.60 | 1.74 | 39.63 |
| 2001 | 3.29 | 3.02 | 1.06 | 2.00 | 5.40 | 0.71 | 0.08 | 3.36 | 7.78 | 3.40 | 1.83 | 2.06 | 33.99 |
| 2002 | 2.59 | 0.87 | * | * | * | 3.37 | 3.84 | 3.83 | * | * | 0.60 | 2.44 | * |
| 2003 | 0.09 | 1.52 | 2.64 | 1.01 | 2.91 | 5.96 | * | 5.38 | 3.59 | 0.28 | 0.99 | 0.74 | * |
| 2004 | 1.63 | 2.11 | 2.50 | 2.44 | 0.37 | 8.43 | 5.19 | 3.69 | 0.18 | 5.84 | 5.84 | 0.79 | 39.01 |
| 2005 | * | * | 0.44 | 0.18 | 1.90 | 2.26 | 3.78 | 3.47 | 2.64 | 1.90 | 0.00 | 0.22 | * |
| 2006 | 0.36 | 0.26 | 2.59 | 3.13 | 2.66 | * | * | 2.83 | 2.81 | 4.15 | 1.33 | 3.86 | * |
| 2007 | 1.97 | 0.86 | 5.60 | 1.76 | 10.02 | 11.17 | 7.30 | 6.22 | 2.06 | 2.34 | 0.47 | 1.67 | 51.44 |
| 2008 | 0.12 | 1.14 | 2.71 | 4.59 | 4.38 | 4.77 | 2.30 | 4.88 | 1.18 | 1.24 | 0.49 | 0.80 | 28.60 |
| 2009 | 1.48 | 1.19 | 1.89 | 5.73 | 7.58 | 2.05 | 4.62 | 2.94 | 4.00 | 6.45 | 0.20 | 1.90 | 40.03 |
| 2010 | 1.92 | 3.40 | 1.93 | 3.19 | 3.41 | 5.22 | 4.83 | 0.12 | 7.95 | 3.09 | 0.30 | 0.32 | 35.68 |
| 2011 | 0.06 | 1.13 | 0.06 | 2.37 | 3.46 | 0.23 | 0.37 | 3.55 | 1.10 | 5.23 | 2.56 | 1.51 | 21.63 |
| 2012 | 1.38 | 1.14 | 6.15 | 1.77 | 3.64 | 2.90 | 0.93 | 3.62 | 3.37 | 0.19 | 0.76 | 0.84 | 26.69 |
| 2013 | 1.44 | 3.27 | 0.78 | 9.24 | * | * | * | * | * | * | * | * | * |