Inches -99 1901-2000 base period 1901-2000 10100 Northeast Climate Region 83.17 49 83.95 -0.78 10200 Upper Midwest Climate Region 58.03 41 59.38 -1.35 10300 Ohio Valley Climate Region 88.5 78 84.45 4.05 10400 Southeast Climate Region 101.41 69 100.84 0.57 10500 Northern Rockies and Plains Climate Region 36.95 61 37.23 -0.28 10600 South Climate Region 71.59 69 69.91 1.68 10700 Southwest Climate Region 30.25 86 29.05 1.2 10800 Northwest Climate Region 70.04 101 64.3 5.74 10900 West Climate Region 37.72 88 34.89 2.83