Average daily temperatures in Portland, Maine, 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 Celsius.
January | February | March | April | May | June | July | August | September | October | November | December | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | 21 26 31 | 21 24 27 | 26 30 34 | 37 40 42 | 48 51 53 | 59 62 66 | 65 67 70 | 67 70 72 | 64 67 70 | 52 55 58 | 45 48 51 | 34 38 42 |
2 | 21 26 30 | 23 26 28 | 27 31 35 | 38 41 43 | 48 52 55 | 59 62 65 | 66 68 70 | 68 71 73 | 62 64 67 | 52 55 58 | 41 45 48 | 32 36 40 |
3 | 20 25 30 | 22 26 30 | 25 29 34 | 38 40 43 | 48 52 55 | 57 60 62 | 66 68 71 | 68 71 73 | 62 64 67 | 52 55 58 | 40 44 49 | 30 34 38 |
4 | 21 26 31 | 21 26 30 | 24 29 34 | 38 41 44 | 49 52 56 | 55 58 60 | 67 69 71 | 68 70 72 | 63 65 68 | 51 54 58 | 39 42 45 | 30 34 38 |
5 | 22 26 31 | 19 24 29 | 28 31 33 | 36 39 43 | 49 52 55 | 56 58 60 | 68 71 73 | 68 70 72 | 62 64 67 | 51 54 58 | 39 42 44 | 29 34 39 |
6 | 21 27 32 | 19 24 29 | 28 32 35 | 36 39 42 | 49 51 53 | 57 59 61 | 68 70 73 | 67 69 71 | 61 64 66 | 48 52 56 | 41 43 46 | 28 33 38 |
7 | 24 28 31 | 19 23 28 | 26 30 35 | 37 41 44 | 49 52 54 | 56 59 62 | 66 69 71 | 66 68 69 | 62 65 67 | 47 50 54 | 40 43 46 | 28 33 38 |
8 | 20 25 29 | 20 23 27 | 27 31 36 | 38 41 44 | 51 54 57 | 58 61 64 | 65 67 70 | 67 69 71 | 63 66 69 | 49 51 54 | 41 44 48 | 26 30 34 |
9 | 21 26 30 | 21 24 28 | 26 31 36 | 39 42 45 | 50 52 54 | 59 63 66 | 65 68 70 | 68 70 72 | 62 65 68 | 49 53 56 | 38 43 47 | 23 26 30 |
10 | 20 26 31 | 24 28 31 | 26 31 35 | 40 43 46 | 50 52 55 | 60 62 65 | 66 68 70 | 68 71 74 | 60 63 65 | 51 54 57 | 38 43 48 | 26 30 34 |
11 | 19 24 29 | 22 25 29 | 28 31 35 | 39 42 44 | 50 52 54 | 58 61 64 | 65 67 70 | 68 70 71 | 58 61 64 | 52 53 55 | 39 43 46 | 28 31 34 |
12 | 21 26 30 | 20 25 29 | 31 34 37 | 39 42 45 | 50 52 55 | 58 61 64 | 66 68 70 | 66 68 70 | 59 61 64 | 48 51 54 | 37 41 44 | 29 32 35 |
13 | 24 28 32 | 19 24 29 | 30 34 38 | 41 43 46 | 48 50 53 | 59 62 65 | 67 69 70 | 65 68 70 | 61 63 65 | 49 51 54 | 36 40 43 | 26 30 35 |
14 | 18 24 31 | 20 24 29 | 30 34 38 | 43 45 47 | 49 51 52 | 59 61 63 | 68 70 73 | 66 69 71 | 60 62 64 | 49 52 55 | 37 41 46 | 25 31 36 |
15 | 15 21 26 | 22 26 31 | 33 36 38 | 42 45 48 | 50 52 54 | 58 61 64 | 67 70 73 | 66 68 70 | 61 63 65 | 47 51 55 | 38 43 48 | 26 30 35 |
16 | 15 21 27 | 21 26 31 | 31 34 37 | 41 45 48 | 50 53 55 | 58 61 65 | 68 70 72 | 67 70 72 | 57 59 62 | 47 49 52 | 37 41 45 | 25 30 34 |
17 | 18 23 28 | 23 27 31 | 30 33 36 | 42 46 50 | 50 53 55 | 60 63 66 | 69 72 74 | 68 71 73 | 56 58 60 | 47 49 52 | 35 39 43 | 26 30 34 |
18 | 17 23 28 | 23 27 32 | 30 35 39 | 43 47 50 | 51 53 55 | 61 64 67 | 69 72 75 | 67 69 72 | 57 59 61 | 46 48 51 | 34 36 39 | 24 29 34 |
19 | 18 24 30 | 24 28 33 | 31 35 39 | 44 47 49 | 51 54 56 | 62 65 68 | 68 70 72 | 65 68 71 | 56 58 61 | 44 48 51 | 33 36 39 | 24 27 31 |
20 | 22 26 30 | 27 30 33 | 31 35 38 | 46 50 53 | 52 54 57 | 64 67 70 | 67 69 72 | 64 66 69 | 56 59 62 | 46 50 53 | 35 39 43 | 25 28 32 |
21 | 17 22 27 | 27 30 34 | 32 36 39 | 45 47 49 | 54 57 60 | 64 66 68 | 67 69 71 | 65 67 69 | 57 60 63 | 46 49 52 | 35 38 42 | 22 27 31 |
22 | 15 20 25 | 25 29 34 | 32 37 41 | 44 47 50 | 52 55 58 | 63 66 68 | 68 71 74 | 65 68 70 | 58 61 63 | 43 47 50 | 34 37 39 | 26 30 33 |
23 | 16 21 27 | 27 30 34 | 32 37 41 | 45 48 50 | 52 54 57 | 63 65 67 | 67 70 73 | 66 67 69 | 58 61 64 | 42 45 49 | 33 36 40 | 25 30 34 |
24 | 16 23 29 | 25 29 32 | 33 36 39 | 46 49 52 | 54 56 59 | 63 66 68 | 67 69 72 | 65 67 69 | 55 59 62 | 43 47 50 | 32 36 41 | 29 33 36 |
25 | 18 23 29 | 25 28 32 | 34 36 38 | 45 48 50 | 54 57 61 | 65 68 71 | 66 69 71 | 64 66 68 | 55 58 61 | 45 48 51 | 32 37 41 | 25 30 34 |
26 | 16 22 27 | 24 29 33 | 35 38 41 | 44 46 49 | 53 57 61 | 67 70 72 | 66 68 71 | 65 67 70 | 55 59 63 | 44 47 50 | 34 38 41 | 24 27 31 |
27 | 16 21 25 | 24 30 35 | 35 39 42 | 45 47 48 | 53 56 59 | 65 69 72 | 67 70 72 | 66 67 69 | 55 58 61 | 44 46 49 | 34 38 42 | 26 30 33 |
28 | 18 23 27 | 26 31 35 | 36 39 42 | 44 47 49 | 55 57 59 | 64 67 70 | 68 70 72 | 65 67 70 | 56 59 62 | 44 47 50 | 33 37 41 | 24 29 33 |
29 | 19 23 27 | 16 28 41 | 37 40 43 | 45 48 51 | 55 58 61 | 65 67 69 | 69 71 72 | 63 65 68 | 54 58 61 | 40 43 46 | 32 36 41 | 26 29 33 |
30 | 19 24 28 | 39 42 45 | 46 49 52 | 58 61 64 | 66 68 71 | 68 70 72 | 64 66 68 | 52 55 58 | 40 43 46 | 32 36 41 | 24 29 33 | |
31 | 20 24 29 | 38 41 45 | 56 60 63 | 67 69 72 | 65 67 69 | 42 45 49 | 23 26 29 |