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Yearly Normals for Prosser, WA

Month Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling Jan 25 40 32 0.88 1011 0 Feb 29 48 38 0.6 750 0 Mar 34 58 46 0.62 585 0 Apr 39 67 53 0.51 364 3 May 46 75 61 0.55 167 31 Jun 52 82 67 0.42 53 121 Jul 56 89 73 0.19 12 256 Aug 55 89 72 0.3 10 227 Sep 47 80 64 0.47 120 75 Oct 37 67 52 0.53 395 1 Nov 31 50 41 0.96 729 0 Dec 25 40 33 1.16 1009 0 Year 40 65 53 7.19 5205 714 Data Controls Monthly | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather