Average daily temperatures in Rockford, Illinois, including the 9 year minima and maxima. Due to the possible presence of missing data c.f. the actual day counts involved in the calculations. Keep in mind that the "raw" daily data represent average day temperatures already. The minima and maxima regard thus the coolest and warmest days experienced over the past 9 years rather than the coldest and hotest temperatures reached during that period.
January | February | March | April | May | June | July | August | September | October | November | December | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | -15 -4 5 | -21 -4 4 | -9 -0 10 | -1 7 18 | 5 13 23 | 11 19 22 | 15 22 28 | 18 24 32 | 15 21 27 | 6 14 22 | -2 8 17 | -6 -0 5 |
2 | -16 -4 7 | -26 -5 3 | -10 -1 6 | 0 8 20 | 4 13 22 | 12 18 22 | 16 22 29 | 18 24 29 | 16 21 28 | 3 14 22 | -2 7 17 | -9 0 14 |
3 | -17 -4 8 | -28 -6 3 | -13 -3 3 | 1 9 16 | 4 13 23 | 12 17 23 | 18 23 29 | 19 24 28 | 16 21 25 | 5 14 24 | -3 5 17 | -12 1 14 |
4 | -18 -4 7 | -25 -6 3 | -18 -2 5 | -0 7 15 | 7 14 22 | 11 17 28 | 16 23 31 | 19 24 28 | 14 20 28 | 6 14 24 | -3 6 16 | -10 -0 15 |
5 | -24 -5 9 | -21 -6 3 | -9 -0 10 | -2 6 17 | 11 15 21 | 11 18 24 | 18 23 31 | 18 23 26 | 15 19 24 | 6 13 24 | -3 5 15 | -15 -2 15 |
6 | -17 -4 8 | -19 -4 5 | -8 -0 10 | -1 8 19 | 8 15 23 | 12 19 27 | 19 23 33 | 18 23 26 | 14 21 25 | 5 13 25 | 0 6 15 | -14 -3 11 |
7 | -20 -5 10 | -17 -3 7 | -13 -0 15 | -2 7 17 | 9 15 23 | 13 20 29 | 18 23 31 | 18 23 28 | 15 20 25 | 3 12 25 | -1 6 14 | -17 -3 8 |
8 | -14 -4 10 | -18 -4 4 | -15 -0 17 | -3 6 14 | 7 15 24 | 13 20 29 | 17 23 28 | 20 23 28 | 14 19 24 | 3 13 23 | -3 6 12 | -14 -3 4 |
9 | -16 -4 7 | -16 -3 6 | -13 -0 9 | -3 6 14 | 7 16 22 | 14 20 27 | 18 23 27 | 17 23 28 | 13 18 25 | 4 13 20 | -5 6 16 | -16 -3 6 |
10 | -18 -4 4 | -19 -4 11 | -14 0 10 | -1 8 22 | 10 15 23 | 12 21 27 | 18 23 27 | 18 23 27 | 14 18 26 | 2 12 20 | -3 6 16 | -16 -3 5 |
11 | -18 -4 6 | -18 -5 13 | -9 2 11 | -0 9 20 | 8 15 26 | 14 21 26 | 19 22 27 | 14 22 27 | 13 19 26 | 1 12 19 | -3 5 16 | -17 -3 2 |
12 | -21 -3 6 | -16 -4 3 | -9 2 12 | 1 9 19 | 5 14 23 | 15 21 25 | 20 22 27 | 13 22 28 | 13 19 25 | 1 13 21 | -6 4 14 | -14 -3 5 |
13 | -17 -5 3 | -12 -4 3 | -6 3 15 | 0 8 17 | 7 13 21 | 16 20 26 | 19 23 30 | 15 22 29 | 12 19 26 | 3 13 20 | -4 4 13 | -19 -3 5 |
14 | -16 -6 2 | -11 -2 5 | -3 4 16 | 2 11 21 | 9 14 21 | 16 21 28 | 20 24 31 | 16 21 28 | 11 17 23 | 5 11 19 | -7 5 14 | -14 -2 6 |
15 | -22 -6 1 | -15 -3 4 | -9 3 19 | 3 12 22 | 7 15 25 | 14 21 26 | 20 25 29 | 16 22 26 | 9 16 23 | 3 10 16 | -6 4 16 | -14 -2 7 |
16 | -26 -6 2 | -16 -4 5 | -6 3 18 | 3 11 24 | 9 15 26 | 15 22 26 | 21 25 29 | 17 22 27 | 10 16 23 | 4 11 18 | -4 4 12 | -15 -2 9 |
17 | -21 -6 2 | -13 -3 7 | -2 5 20 | 3 10 24 | 7 15 23 | 14 21 27 | 17 25 31 | 18 22 26 | 13 17 23 | 4 10 19 | -8 2 14 | -13 -4 7 |
18 | -19 -6 9 | -19 -3 6 | -1 4 19 | 5 11 23 | 6 15 23 | 16 22 27 | 16 25 30 | 17 21 26 | 12 18 24 | 5 10 20 | -4 4 14 | -16 -4 7 |
19 | -18 -7 4 | -15 -3 6 | -6 4 20 | 3 11 20 | 9 16 25 | 17 22 29 | 17 24 31 | 17 21 26 | 10 18 24 | 5 10 15 | -3 4 12 | -17 -4 6 |
20 | -19 -8 1 | -13 -1 7 | -7 5 22 | 3 10 19 | 6 17 25 | 16 22 29 | 18 23 31 | 16 21 26 | 10 17 22 | 3 9 17 | -4 4 10 | -17 -5 3 |
21 | -19 -7 -0 | -12 -2 2 | -7 4 22 | 4 10 21 | 6 16 22 | 17 23 28 | 17 24 31 | 17 21 28 | 8 16 24 | 3 10 19 | -8 2 7 | -16 -5 4 |
22 | -16 -6 3 | -9 -1 5 | -6 4 21 | 4 10 20 | 11 16 23 | 17 22 27 | 18 23 28 | 17 22 26 | 4 15 23 | 3 9 15 | -6 3 14 | -21 -5 8 |
23 | -17 -6 5 | -10 -1 9 | -0 5 18 | 5 11 19 | 10 17 25 | 18 23 28 | 18 23 29 | 17 22 25 | 5 15 23 | 2 10 18 | -4 3 12 | -15 -5 4 |
24 | -18 -7 3 | -9 -1 10 | -2 5 15 | 5 11 18 | 9 17 27 | 16 23 28 | 17 22 29 | 18 22 26 | 9 15 26 | 2 10 20 | -6 1 14 | -17 -5 2 |
25 | -19 -7 2 | -15 -0 10 | -6 6 19 | 7 11 20 | 9 15 25 | 15 23 28 | 19 23 29 | 18 22 28 | 8 15 25 | 2 10 19 | -8 2 8 | -23 -6 3 |
26 | -17 -6 5 | -10 -0 13 | -9 5 21 | 6 10 14 | 10 16 22 | 17 23 27 | 18 23 29 | 18 22 27 | 10 16 25 | 3 10 18 | -9 2 11 | -14 -5 1 |
27 | -15 -6 6 | -7 -0 8 | -6 6 19 | 6 11 20 | 11 16 26 | 19 23 28 | 17 23 27 | 16 22 27 | 11 15 25 | -0 8 16 | -10 2 13 | -10 -4 7 |
28 | -19 -6 4 | -12 -2 4 | -1 6 17 | 5 11 19 | 11 17 28 | 16 23 29 | 19 23 28 | 16 21 25 | 10 14 19 | 1 7 16 | -7 2 13 | -15 -3 7 |
29 | -18 -4 10 | -10 2 10 | 1 6 15 | 4 12 21 | 13 18 27 | 17 22 28 | 20 23 27 | 16 21 25 | 8 14 21 | 4 8 19 | -12 2 15 | -12 -3 6 |
30 | -20 -6 3 | 0 7 22 | 3 13 22 | 13 20 25 | 18 22 28 | 18 24 30 | 15 21 25 | 8 15 24 | 5 10 17 | -5 2 15 | -11 -2 7 | |
31 | -23 -5 7 | 2 8 16 | 10 19 25 | 18 24 29 | 13 21 26 | -1 9 15 | -11 -1 10 |