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Yearly Normals for Grand Isle, LA

Month Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling Jan 43 63 53 5.85 404 18 Feb 46 65 56 4.59 270 9 Mar 53 71 62 5.53 137 51 Apr 59 77 68 4.43 37 124 May 67 84 75 5.75 1 314 Jun 72 88 80 5.82 0 452 Jul 74 90 82 7.69 0 523 Aug 74 90 82 7.13 0 519 Sep 71 86 79 6.34 0 405 Oct 60 79 70 3.65 31 183 Nov 53 72 62 4.67 157 73 Dec 45 65 55 4.03 322 22 Year 60 78 69 65.48 1359 2693 Data Controls Monthly | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather