WEATHER IN Allentown
Monthly temperature
| Month | Record low | Average low | Average | Average high | Record high |
| january | -15 (1994) | 21.8 | 30.1 | 38.4 | 72 (1950) |
| february | -12 (1934) | 23.2 | 32.4 | 41.6 | 76 (1985) |
| march | -5 (1934) | 30.5 | 40.7 | 50.8 | 87 (1998) |
| april | 12 (1923) | 40.3 | 51.8 | 63.4 | 93 (1976) |
| may | 28 (1947) | 50.6 | 62.0 | 73.5 | 97 (1962) |
| june | 39 (1945) | 59.9 | 70.9 | 81.9 | 100 (1925) |
| july | 46 (2001) | 64.7 | 75.6 | 86.4 | 105 (1966) |
| august | 41 (1986) | 62.8 | 73.6 | 84.3 | 100 (1955) |
| september | 30 (1947) | 55.2 | 66.3 | 77.4 | 99 (1980) |
| october | 21 (1940) | 43.8 | 54.6 | 65.5 | 92 (1927) |
| november | 3 (1938) | 34.1 | 43.9 | 53.8 | 81 (1950) |
| december | -8 (1950) | 26.8 | 35.0 | 43.1 | 72 (2006) |
| year | -15 (1994) | 40.8 | 51.1 | 61.4 | 105 (1966) |
Monthly precipitation
| Month | Average | Record low | Record high | Daily high |
| january | 3.30 | 0.67 (1981) | 8.42 (1979) | 2.37 (1949) |
| february | 2.77 | 0.55 (2002) | 7.62 (2008) | 2.94 (2008) |
| march | 3.63 | 0.92 (2006) | 7.24 (1913) | 2.99 (1952) |
| april | 3.67 | 0.61 (1985) | 10.09 (1952) | 3.46 (2005) |
| may | 3.65 | 0.09 (1964) | 10.62 (1984) | 3.23 (1972) |
| june | 4.40 | 0.34 (1949) | 10.51 (1938) | 3.63 (1938) |
| july | 5.30 | 0.33 (1999) | 10.42 (1969) | 5.67 (2010) |
| august | 4.56 | 0.76 (1995) | 13.47 (2011) | 4.77 (1933) |
| september | 4.84 | 0.12 (1943) | 12.99 (2011) | 6.37 (1999) |
| october | 4.14 | 0.15 (1963) | 13.16 (2005) | 8.71 (2005) |
| november | 3.24 | 0.43 (1931) | 9.69 (1972) | 3.35 (1972) |
| december | 3.86 | 0.39 (1955) | 7.89 (1973) | 2.68 (1953) |
| year | 45.35 | 28.76 (1941) | 71.72 (2011) | 8.71 (2005) |
Number of days with solid, liquid, and mixed precipitation
| Type of precipitation | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Wind speed, m/s
| jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
The frequency of different wind directions, %
| direction | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Air humidity, %
| jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Snow cover
| Month | jul | aug | sep | oct | nov | dec | jan | feb | mar | apr | may | jun | Year |
| number of days | |||||||||||||
| height (sm) | |||||||||||||
| max height (sm) |
Cloudy, score
| month | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
| total | |||||||||||||
| low |
Number of clear, cloudy and cloudy days
| month | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
| Total cloud | |||||||||||||
| Low cloud | |||||||||||||
Number of days with different phenomena
| phenomenon | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
The frequency of different types of clouds, %
| type of clouds | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |