Common information

Country
United States
Population
74 982

Weather, climate, temperature by months in Bethlehem

Season Autumn Winter Spring Summer
Month Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Year
Record high, °C 38 34 27 21 22 24 30 34 38 40 40 41 41
Average high, °C 25 19 12 5 4 4 10 17 23 28 30 29 17
Average temperature, °C 19 14 7 1 -1 -0 5 11 17 22 24 23 12
Average low, °C 14 8 2 -3 -5 -5 -1 5 11 16 18 17 6
Record low, °C -1 -7 -12 -23 -27 -25 -18 -7 0 4 8 6 -27
Rain, days 9 8 10 11 11 10 11 12 12 11 10 10 125
Snow, days 0 0 1 4 6 5 3 0 0 0 0 0 17
Fog, days 19 17 15 14 14 12 13 12 16 16 18 20 186
Thunderstorms, days 3 1 1 0 0 0 1 2 4 6 7 6 31
Snowfall, cm. 0 0 2 17 17 17 16 1 0 0 0 0 69
Average precipitation, mm. 107 91 90 107 104 78 99 75 105 106 116 102 1180
Relative humidity, % 74 72 69 68 66 62 61 60 66 70 70 72 68
Relative humidity morning, % 88 87 82 79 77 76 76 75 78 79 82 86 80
Relative humidity evening, % 57 55 60 64 62 57 52 48 51 52 52 55 55
Wind speed, km/h 11 11 13 14 14 15 15 15 13 12 11 10 13
Day Length, часов 13 12 10 10 10 11 13 14 15 16 15 14 13
Dew point, °C 13 6 1 -4 -7 -7 -3 2 9 15 17 17 58
Growing degree-day, °C 282 110 0 0 0 0 0 23 207 347 436 403 1807
Solar radiation, global, Mj/m2 15 11 7 6 7 10 13 16 18 20 20 18 13

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