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Yearly Normals for Isabella, OK

Month Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling Jan 21 44 33 0.96 998 0 Feb 26 50 38 1.29 754 0 Mar 35 60 47 2.89 547 0 Apr 44 70 57 2.79 270 23 May 54 79 67 4.59 76 126 Jun 64 89 77 3.86 5 355 Jul 69 95 82 3.2 0 529 Aug 68 94 81 3.04 1 487 Sep 59 85 72 3.04 27 239 Oct 47 73 60 2.65 186 29 Nov 34 58 46 2.04 578 0 Dec 24 47 36 1.29 907 0 Year 45 70 58 31.64 4349 1788 Data Controls Monthly | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather