Average daily temperatures in Des Moines, Iowa, including the lower and upper bounds of the 95% confidence interval. Due to the possibility of missing data, the actual day counts used in the average and confidence interval calculations are provided. The table is also offered in degrees of Fahrenheit.
January | February | March | April | May | June | July | August | September | October | November | December | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | -8 -5 -1 | -8 -4 -0 | -3 -1 2 | 6 9 12 | 12 14 16 | 18 20 22 | 22 24 26 | 23 25 27 | 21 23 24 | 14 16 18 | 5 8 11 | -2 1 3 |
2 | -9 -5 -1 | -8 -4 -0 | -4 -1 1 | 7 10 12 | 11 13 15 | 18 19 20 | 23 24 26 | 23 25 27 | 22 23 25 | 12 15 18 | 4 7 9 | -2 1 4 |
3 | -7 -4 -1 | -9 -5 -1 | -5 -3 -0 | 8 10 13 | 10 13 15 | 17 19 21 | 23 24 26 | 24 25 27 | 21 22 24 | 12 15 18 | 3 6 9 | -3 0 4 |
4 | -9 -5 -1 | -10 -6 -2 | -3 -1 1 | 4 7 10 | 12 14 16 | 18 20 21 | 22 24 26 | 24 25 26 | 19 21 23 | 12 14 17 | 4 7 10 | -3 0 4 |
5 | -9 -5 -1 | -7 -4 -1 | -2 1 3 | 6 9 12 | 14 16 18 | 18 20 22 | 22 24 25 | 23 24 25 | 20 21 23 | 12 15 17 | 4 7 9 | -5 -2 2 |
6 | -8 -4 -1 | -6 -3 -0 | -3 1 4 | 7 10 13 | 14 16 18 | 19 21 22 | 23 24 26 | 22 24 25 | 20 22 24 | 11 14 17 | 6 8 10 | -5 -2 0 |
7 | -9 -5 -2 | -7 -3 -0 | -3 1 5 | 6 9 12 | 15 16 18 | 20 22 24 | 24 25 27 | 23 24 25 | 20 21 22 | 11 14 17 | 5 7 10 | -6 -3 0 |
8 | -7 -4 -1 | -7 -4 -1 | -4 -1 3 | 5 7 10 | 15 16 18 | 19 21 23 | 24 25 26 | 23 24 26 | 18 20 21 | 11 14 17 | 3 7 10 | -5 -3 -1 |
9 | -7 -3 0 | -7 -3 0 | -3 -0 2 | 6 8 11 | 14 16 18 | 19 21 23 | 24 25 26 | 23 25 26 | 18 20 21 | 12 14 16 | 4 7 10 | -6 -3 -0 |
10 | -7 -4 -1 | -7 -3 1 | -2 1 4 | 7 10 13 | 15 17 19 | 20 21 22 | 23 24 26 | 22 24 25 | 18 20 21 | 11 13 15 | 3 6 10 | -7 -4 -0 |
11 | -6 -3 0 | -8 -5 -2 | -1 2 5 | 7 10 13 | 14 16 18 | 20 22 23 | 23 24 25 | 21 23 25 | 19 21 22 | 11 13 16 | 1 4 7 | -5 -2 1 |
12 | -7 -4 -1 | -6 -3 -1 | -1 3 6 | 6 9 12 | 12 14 16 | 21 22 23 | 23 24 25 | 21 23 25 | 18 20 22 | 11 14 17 | 2 5 7 | -6 -2 2 |
13 | -10 -6 -3 | -5 -3 -0 | 1 4 7 | 7 10 13 | 12 14 16 | 21 22 23 | 23 25 26 | 21 23 24 | 18 19 21 | 11 13 15 | 2 5 8 | -5 -2 1 |
14 | -9 -6 -3 | -4 -1 2 | 2 5 8 | 10 13 16 | 12 15 17 | 20 22 23 | 24 25 26 | 21 23 24 | 16 18 20 | 9 12 14 | 3 6 8 | -4 -1 2 |
15 | -10 -6 -3 | -6 -3 1 | 2 4 7 | 11 13 16 | 14 16 19 | 21 22 23 | 25 26 27 | 22 23 24 | 15 17 19 | 10 12 14 | 2 4 7 | -5 -2 2 |
16 | -9 -6 -2 | -7 -4 -1 | 3 6 9 | 9 12 15 | 15 17 19 | 21 22 24 | 25 26 27 | 22 23 25 | 16 18 20 | 9 12 14 | 2 4 7 | -6 -2 1 |
17 | -8 -5 -2 | -5 -2 1 | 3 7 10 | 8 11 14 | 16 18 20 | 21 23 24 | 25 26 28 | 22 23 25 | 17 19 20 | 9 11 14 | 1 4 7 | -7 -4 -1 |
18 | -9 -6 -3 | -4 -1 2 | 3 6 9 | 10 13 16 | 16 18 20 | 22 23 25 | 24 26 28 | 21 23 25 | 17 19 21 | 9 11 13 | 2 5 8 | -5 -2 1 |
19 | -10 -6 -3 | -4 -1 2 | 2 5 7 | 10 12 15 | 17 19 21 | 21 23 24 | 24 26 27 | 21 22 24 | 16 18 20 | 9 11 13 | 3 5 7 | -7 -4 -1 |
20 | -10 -7 -5 | -3 -0 3 | 3 5 8 | 9 11 13 | 16 18 20 | 22 23 25 | 24 26 28 | 21 22 24 | 15 17 19 | 9 11 13 | 1 3 6 | -7 -4 -2 |
21 | -8 -6 -3 | -3 -1 2 | 2 5 8 | 10 12 14 | 16 18 19 | 22 24 25 | 24 25 27 | 22 23 25 | 14 16 19 | 9 11 13 | 0 3 5 | -8 -5 -1 |
22 | -7 -4 -2 | -3 -1 2 | 3 6 8 | 11 12 14 | 17 18 20 | 22 24 26 | 24 25 27 | 23 24 25 | 14 16 18 | 8 10 13 | 1 4 6 | -9 -5 -1 |
23 | -9 -6 -3 | -3 -0 3 | 4 6 9 | 10 12 14 | 17 18 20 | 22 24 26 | 23 25 27 | 23 24 25 | 14 16 18 | 7 10 13 | 1 3 6 | -8 -5 -3 |
24 | -9 -6 -4 | -3 -0 3 | 4 7 10 | 11 13 15 | 15 18 20 | 22 23 25 | 23 25 26 | 22 23 25 | 13 16 18 | 7 10 13 | -1 2 4 | -9 -6 -3 |
25 | -8 -6 -3 | -3 0 4 | 3 6 10 | 11 13 14 | 15 17 19 | 22 24 26 | 23 25 27 | 22 23 24 | 14 16 18 | 8 10 13 | -1 2 4 | -9 -6 -3 |
26 | -8 -5 -2 | -3 -1 2 | 3 7 11 | 10 12 14 | 15 17 19 | 22 24 26 | 24 25 26 | 22 23 25 | 15 17 19 | 7 9 12 | -0 2 5 | -7 -4 -1 |
27 | -8 -5 -1 | -4 -1 1 | 4 8 11 | 10 12 13 | 16 18 20 | 23 24 25 | 23 24 26 | 22 24 25 | 15 16 18 | 5 8 11 | -0 2 5 | -6 -3 -0 |
28 | -9 -5 -1 | -4 -2 1 | 5 7 10 | 10 13 15 | 16 19 21 | 22 23 25 | 24 25 26 | 22 23 25 | 15 16 18 | 6 8 10 | -1 2 5 | -4 -2 0 |
29 | -7 -4 -1 | -8 4 15 | 6 8 10 | 11 14 16 | 18 20 21 | 22 23 25 | 23 25 26 | 22 23 25 | 14 16 18 | 8 10 13 | -0 2 5 | -6 -3 0 |
30 | -10 -6 -3 | 7 10 12 | 12 14 17 | 19 21 22 | 22 23 25 | 23 25 27 | 21 23 24 | 15 17 19 | 9 11 13 | -2 1 3 | -4 -1 3 | |
31 | -8 -4 0 | 6 8 11 | 18 20 22 | 23 25 27 | 21 23 24 | 5 8 10 | -6 -3 1 |