1971-2000 Daily/Monthly Station Normals Provided by National Climatic Data Center/NESDIS/NOAA ------------------------------------------------------------------------------------------------- DES MOINES, IOWA Airport ------------------------------------------------------------------------------------------------- MINIMUM TEMPERATURE (deg F) DAY 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Monthly ------------------------------------------------------------------------------------------------- Average JAN 12 12 12 12 12 12 11 11 11 11 11 11 11 11 11 11 11 11 11 11 12 12 12 12 12 12 13 13 13 13 13 11.7 FEB 14 14 14 14 15 15 15 16 16 16 16 17 17 17 18 18 18 19 19 20 20 20 21 21 21 22 22 23 17.8 MAR 23 23 24 24 25 25 25 26 26 26 27 27 28 28 28 29 29 30 30 30 31 31 31 32 32 32 33 33 34 34 34 28.7 APR 35 35 35 36 36 36 37 37 37 38 38 39 39 39 40 40 40 41 41 42 42 42 43 43 43 44 44 45 45 45 39.9 MAY 46 46 47 47 47 48 48 48 49 49 50 50 50 51 51 51 52 52 53 53 53 54 54 54 55 55 55 56 56 56 57 51.4 JUN 57 57 58 58 58 59 59 59 59 60 60 60 61 61 61 61 62 62 62 62 62 63 63 63 63 64 64 64 64 64 61.0 JUL 65 65 65 65 65 65 65 66 66 66 66 66 66 66 66 66 66 66 67 67 67 67 67 67 67 67 67 67 66 66 66 66.1 AUG 66 66 66 66 66 66 66 66 66 65 65 65 65 65 65 64 64 64 64 63 63 63 63 62 62 62 61 61 61 60 60 63.9 SEP 60 59 59 59 58 58 57 57 57 56 56 56 55 55 55 54 54 53 53 53 52 52 51 51 51 50 50 50 49 49 54.3 OCT 48 48 48 47 47 46 46 46 45 45 44 44 43 43 43 42 42 41 41 41 40 40 39 39 38 38 38 37 37 36 36 42.2 NOV 35 35 35 34 34 33 33 32 32 31 31 31 30 30 29 29 28 28 27 27 27 26 26 25 25 24 24 23 23 23 29.0 DEC 22 22 21 21 20 20 20 19 19 18 18 18 17 17 17 16 16 16 15 15 15 15 14 14 14 14 13 13 13 13 13 16.7 ------------------------------------------------------------------------------------------------- MAXIMUM TEMPERATURES (deg F) DAY 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Monthly ------------------------------------------------------------------------------------------------- Average JAN 29 29 29 29 29 29 29 29 28 28 28 28 28 28 29 29 29 29 29 29 29 29 29 29 30 30 30 30 30 31 31 29.1 FEB 31 31 32 32 32 32 33 33 33 34 34 34 35 35 35 36 36 36 37 37 38 38 38 39 39 40 40 41 35.4 MAR 41 42 42 43 43 44 44 45 45 45 46 46 47 47 48 48 49 49 50 50 50 51 51 52 52 53 53 54 54 55 55 48.2 APR 55 56 56 57 57 58 58 58 59 59 60 60 60 61 61 62 62 62 63 63 64 64 64 65 65 65 66 66 66 67 61.3 MAY 67 67 68 68 69 69 69 70 70 70 71 71 71 72 72 72 73 73 73 74 74 74 75 75 75 76 76 76 77 77 77 72.3 JUN 78 78 79 79 79 79 80 80 80 81 81 81 81 82 82 82 82 83 83 83 83 83 84 84 84 84 84 85 85 85 81.8 JUL 85 85 85 85 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 87 87 87 87 86 86 86 86 86 86 86 86 86.0 AUG 86 86 86 86 86 86 85 85 85 85 85 85 85 84 84 84 84 84 84 83 83 83 83 83 82 82 82 82 81 81 81 83.9 SEP 81 80 80 80 79 79 79 78 78 78 77 77 77 77 76 76 76 75 75 74 74 74 73 73 73 72 72 72 71 71 75.9 OCT 70 70 70 69 69 68 68 67 67 67 66 66 65 65 64 64 63 63 62 62 61 61 60 60 59 58 58 57 57 56 56 63.5 NOV 55 54 54 53 52 52 51 51 50 50 49 48 48 47 47 46 46 45 45 44 44 43 43 42 42 41 40 40 40 39 46.7 DEC 39 38 38 37 37 36 36 35 35 35 34 34 34 33 33 33 32 32 32 31 31 31 31 31 30 30 30 30 30 29 29 33.1 ------------------------------------------------------------------------------------------------- AVERAGE TEMPERATURE (deg F) DAY 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Monthly ------------------------------------------------------------------------------------------------- Average JAN 21 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 21 21 21 21 21 22 22 22 20.4 FEB 22 23 23 23 23 24 24 24 25 25 25 25 26 26 27 27 27 28 28 28 29 29 30 30 30 31 31 32 26.6 MAR 32 32 33 33 34 34 35 35 35 36 36 37 37 38 38 38 39 39 40 40 41 41 41 42 42 43 43 43 44 44 45 38.4 APR 45 45 46 46 47 47 47 48 48 48 49 49 50 50 50 51 51 52 52 52 53 53 54 54 54 55 55 55 56 56 50.6 MAY 57 57 57 58 58 58 59 59 59 60 60 61 61 61 62 62 62 63 63 63 64 64 64 65 65 65 66 66 66 67 67 61.9 JUN 67 68 68 68 69 69 69 70 70 70 70 71 71 71 72 72 72 72 72 73 73 73 73 74 74 74 74 74 74 75 71.4 JUL 75 75 75 75 75 76 76 76 76 76 76 76 76 76 76 76 76 76 77 77 77 77 77 77 77 77 76 76 76 76 76 76.1 AUG 76 76 76 76 76 76 76 76 75 75 75 75 75 75 74 74 74 74 74 73 73 73 73 72 72 72 72 71 71 71 70 73.9 SEP 70 70 69 69 69 69 68 68 67 67 67 66 66 66 65 65 65 64 64 64 63 63 62 62 62 61 61 61 60 60 65.1 OCT 59 59 59 58 58 57 57 56 56 56 55 55 54 54 53 53 52 52 52 51 51 50 50 49 49 48 48 47 47 46 46 52.8 NOV 45 45 44 44 43 43 42 42 41 40 40 39 39 38 38 38 37 37 36 36 35 35 34 34 33 33 32 32 31 31 37.9 DEC 30 30 29 29 29 28 28 27 27 27 26 26 25 25 25 25 24 24 24 23 23 23 23 22 22 22 22 21 21 21 21 24.9 ------------------------------------------------------------------------------------------------- HEATING DEGREE DAYS DAY 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Monthly ------------------------------------------------------------------------------------------------- Average JAN 44 44 44 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 44 44 44 44 44 43 1385 FEB 43 43 43 42 42 42 42 41 41 41 40 40 40 39 39 39 38 38 38 37 37 36 36 35 35 35 34 34 1090 MAR 33 33 32 32 31 31 31 30 30 29 29 28 28 27 27 27 26 26 25 25 24 24 24 23 23 22 22 22 21 21 20 826 APR 20 20 19 19 19 18 18 17 17 17 16 16 16 15 15 14 14 14 13 13 13 12 12 11 11 11 10 10 10 9 439 MAY 9 9 8 8 8 7 7 7 7 6 6 6 5 5 5 5 4 4 4 4 4 3 3 3 3 3 2 2 2 2 2 153 JUN 2 2 2 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 16 JUL 0 0 0 0 0 0 0 0 0 0 0 0-99 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 AUG 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 6 SEP 1 1 1 1 2 2 2 2 2 2 2 3 3 3 3 3 3 4 4 4 4 5 5 5 5 6 6 6 6 7 103 OCT 7 7 7 8 8 8 9 9 9 10 10 11 11 11 12 12 13 13 13 14 14 15 15 16 16 17 17 18 18 19 19 386 NOV 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 28 29 29 30 30 31 31 32 32 33 33 34 804 DEC 34 35 35 35 36 36 37 37 37 38 38 39 39 39 40 40 40 41 41 41 41 42 42 42 42 43 43 43 43 44 44 1227 ------------------------------------------------------------------------------------------------- COOLING DEGREE DAYS DAY 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Monthly ------------------------------------------------------------------------------------------------- Average JAN 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 FEB 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MAR 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0-99 1 APR 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 12 MAY 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 3 3 3 3 3 3 4 4 4 60 JUN 4 5 5 5 5 5 6 6 6 6 6 7 7 7 7 7 8 8 8 8 8 9 9 9 9 9 10 10 10 10 219 JUL 10 10 10 11 11 11 11 11 11 11 11 11 11 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 11 11 11 353 AUG 11 11 11 11 11 11 11 10 10 10 10 10 10 10 9 9 9 9 9 9 9 8 8 8 8 8 7 7 7 7 7 285 SEP 6 6 6 6 5 5 5 5 5 4 4 4 4 4 4 3 3 3 3 3 3 3 2 2 2 2 2 2 2 2 110 OCT 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12 NOV 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DEC 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ------------------------------------------------------------------------------------------------- TOTAL PRECIPITATION (Hundreths of an Inch) DAY 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Monthly ------------------------------------------------------------------------------------------------- Average JAN 4 4 4 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 1.03 FEB 3 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 5 1.19 MAR 5 5 5 6 6 6 6 6 6 6 6 6 7 7 7 7 7 7 7 8 8 8 8 8 8 9 9 9 9 9 10 2.21 APR 10 10 10 10 11 11 11 11 11 11 12 12 12 12 12 12 12 12 13 13 13 13 13 13 13 13 13 13 13 13 3.58 MAY 13 13 13 13 13 13 13 13 13 13 13 13 13 14 14 14 14 14 14 14 14 14 14 14 14 14 14 15 15 15 15 4.25 JUN 15 15 15 15 15 15 15 15 16 16 16 16 16 16 16 16 16 15 15 15 15 15 15 15 15 15 15 15 14 14 4.57 JUL 14 14 14 14 14 14 14 14 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 14 14 14 14 14 14 14 4.18 AUG 14 14 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 14 14 14 14 14 14 13 13 13 4.51 SEP 13 13 12 12 12 12 12 11 11 11 11 11 11 11 10 10 10 10 10 10 10 10 9 9 9 9 9 9 9 9 3.15 OCT 9 9 9 9 9 9 9 9 9 9 9 9 9 9 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2.62 NOV 8 8 8 8 8 8 8 8 7 7 7 7 7 7 7 7 7 7 7 7 7 7 6 6 6 6 6 6 6 6 2.10 DEC 6 5 5 5 5 5 5 5 5 5 5 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 3 3 3 1.33 Key: -99 indicates a value less than 1