United States - When to go?

Avg. temperature (°C)(°F) 0.0 0.0 3.9 10.0 15.6 20.6 23.9 22.8 18.9 12.8 6.7 0.6 32 32 39 50 60 69 75 73 66 55 44 33

Av. precipitations (mm)(in) 86 83 96 91 99 88 106 111 93 88 88 91 3.4 3.3 3.8 3.6 3.9 3.5 4.2 4.4 3.7 3.5 3.5 3.6

Avg. temperature (°C)(°F) 13.9 13.9 15.0 16.7 17.8 18.9 21.7 22.8 21.7 18.9 17.8 15.0 57 57 59 62 64 66 71 73 71 66 64 59

Av. precipitations (mm)(in) 68 78 55 33 7 2 0 0 5 10 27 63 2.7 3.1 2.2 1.3 0.3 0.1 0.0 0.0 0.2 0.4 1.1 2.5

Avg. temperature (°C)(°F) 10.6 11.7 12.8 12.8 13.9 15.6 15.6 15.6 16.7 16.7 13.9 10.6 51 53 55 55 57 60 60 60 62 62 57 51

Av. precipitations (mm)(in) 104 88 73 38 12 5 0 0 5 27 66 99 4.1 3.5 2.9 1.5 0.5 0.2 0.0 0.0 0.2 1.1 2.6 3.9

Avg. temperature (°C)(°F) 0.0 1.7 6.7 11.7 17.8 22.2 25.0 23.9 20.0 13.9 8.3 2.8 32 35 44 53 64 72 77 75 68 57 47 37

Av. precipitations (mm)(in) 78 76 83 83 106 96 111 111 91 83 86 83 3.1 3.0 3.3 3.3 4.2 3.8 4.4 4.4 3.6 3.3 3.4 3.3

Avg. temperature (°C)(°F) 6.7 10.6 12.8 17.8 22.8 28.9 31.7 30.6 26.7 20.0 11.7 7.8 44 51 55 64 73 84 89 87 80 68 53 46

Av. precipitations (mm)(in) 15 12 12 5 5 2 10 12 7 5 10 10 0.6 0.5 0.5 0.2 0.2 0.1 0.4 0.5 0.3 0.2 0.4 0.4

Avg. temperature (°C)(°F) 6.7 9.4 13.9 18.9 22.8 27.2 29.4 29.4 25.6 19.4 13.3 8.3 44 49 57 66 73 81 84 84 78 66 55 47

Av. precipitations (mm)(in) 45 58 81 99 127 88 60 58 91 99 60 48 1.8 2.3 3.2 3.9 5.0 3.5 2.4 2.3 3.6 3.9 2.4 1.9

Avg. temperature (°C)(°F) -4.4 -2.2 3.9 10.0 15.6 21.1 23.9 23.3 19.4 13.3 6.1 -1.1 24 28 39 50 60 70 75 73 66 55 43 30

Av. precipitations (mm)(in) 48 40 73 96 91 104 96 99 88 60 78 71 1.9 1.6 2.9 3.8 3.6 4.1 3.8 3.9 3.5 2.4 3.1 2.8

Avg. temperature (°C)(°F) 11.1 12.8 16.7 20.6 23.9 27.2 27.8 27.8 26.1 21.1 16.7 13.3 52 55 62 69 75 81 82 82 79 70 62 55

Av. precipitations (mm)(in) 124 134 121 119 114 147 170 167 144 76 109 132 4.9 5.3 4.8 4.7 4.5 5.8 6.7 6.6 5.7 3.0 4.3 5.2

Avg. temperature (°C)(°F) 5.6 6.7 10.6 15.6 20.6 23.9 25.6 25.6 21.7 16.7 10.6 6.7 42 44 51 60 69 75 78 78 71 62 51 44

Av. precipitations (mm)(in) 127 121 144 109 111 93 124 96 91 78 96 116 5.0 4.8 5.7 4.3 4.4 3.7 4.9 3.8 3.6 3.1 3.8 4.6

Avg. temperature (°C)(°F) 20.0 20.0 21.7 23.3 25.6 26.7 27.8 27.8 27.2 25.6 23.3 20.6 68 68 71 73 78 80 82 82 81 78 73 69

Av. precipitations (mm)(in) 53 55 48 58 144 180 101 116 162 116 71 40 2.1 2.2 1.9 2.3 5.7 7.1 4.0 4.6 6.4 4.6 2.8 1.6

Avg. temperature (°C)(°F) -2.2 0.6 3.9 8.9 12.8 18.9 21.7 20.6 15.6 8.9 2.2 -2.2 28 33 39 48 55 66 71 69 60 48 36 28

Av. precipitations (mm)(in) 10 12 35 38 71 48 48 50 27 30 27 15 0.4 0.5 1.4 1.5 2.8 1.9 1.9 2.0 1.1 1.2 1.1 0.6

Avg. temperature (°C)(°F) -2.2 -1.1 2.8 8.9 12.8 17.8 22.8 21.7 16.7 11.7 3.9 -1.1 28 30 37 48 55 64 73 71 62 53 39 30

Av. precipitations (mm)(in) 20 15 22 38 30 20 12 15 15 12 22 20 0.8 0.6 0.9 1.5 1.2 0.8 0.5 0.6 0.6 0.5 0.9 0.8

Avg. temperature (°C)(°F) -12.2 -10.0 -3.3 5.6 11.7 17.8 20.6 20.0 13.9 6.7 -2.2 -9.4 10 14 26 42 53 64 69 68 57 44 28 15

Av. precipitations (mm)(in) 12 12 20 38 55 81 58 48 35 25 15 12 0.5 0.5 0.8 1.5 2.2 3.2 2.3 1.9 1.4 1.0 0.6 0.5

Avg. temperature (°C)(°F) 3.9 6.7 7.8 10.0 13.9 15.6 17.8 17.8 15.6 11.7 7.8 6.1 39 44 46 50 57 60 64 64 60 53 46 43

Av. precipitations (mm)(in) 152 101 93 55 33 35 17 22 45 78 134 139 6.0 4.0 3.7 2.2 1.3 1.4 0.7 0.9 1.8 3.1 5.3 5.5

Avg. temperature (°C)(°F) 22.8 21.7 22.8 22.8 23.9 25.0 25.0 25.6 25.6 25.6 23.9 22.8 73 71 73 73 75 77 77 78 78 78 75 73

Av. precipitations (mm)(in) 137 88 93 76 53 33 48 45 45 58 109 111 5.4 3.5 3.7 3.0 2.1 1.3 1.9 1.8 1.8 2.3 4.3 4.4

Avg. temperature (°C)(°F) 0.0 0.6 6.7 12.8 18.9 23.9 25.6 25.0 20.6 15.0 6.7 1.7 32 33 44 55 66 75 78 77 69 59 44 35

Av. precipitations (mm)(in) 55 60 86 96 109 106 91 83 78 71 73 63 2.2 2.4 3.4 3.8 4.3 4.2 3.6 3.3 3.1 2.8 2.9 2.5

Avg. temperature (°C)(°F) -21.7 -17.8 -11.1 -0.6 7.8 13.9 15.6 12.8 6.7 -4.4 -16.1 -20.6 -7 -4 12 31 46 57 60 55 44 24 3 -5

Av. precipitations (mm)(in) 17 10 10 7 17 40 53 58 33 22 25 17 0.7 0.4 0.4 0.3 0.7 1.6 2.1 2.3 1.3 0.9 1.0 0.7