Annual Weather Averages in Mercer County Airport
Mercer County Airport is 20 miles from Hornerstown, so the actual climate in Hornerstown can vary a bit.
Based on weather reports collected during 1992–2021.
All Year Climate & Weather Averages in Hornerstown
High Temp: 86 °F
Low Temp: 25 °F
Mean Temp: 54 °F
Precipitation: 3.21"
Humidity: 65%
Dew Point: 42 °F
Wind: 12 mph
Pressure: 30.03 "Hg
Visibility: 9 mi
January Climate & Weather Averages in Hornerstown
High Temp: 40 °F
Low Temp: 25 °F
Mean Temp: 32 °F
Precipitation: 2.53"
Humidity: 63%
Dew Point: 21 °F
Wind: 13 mph
Pressure: 30.08 "Hg
Visibility: 9 mi
February Climate & Weather Averages in Hornerstown
High Temp: 43 °F
Low Temp: 26 °F
Mean Temp: 34 °F
Precipitation: 2.24"
Humidity: 60%
Dew Point: 21 °F
Wind: 14 mph
Pressure: 30.06 "Hg
Visibility: 9 mi
March Climate & Weather Averages in Hornerstown
High Temp: 51 °F
Low Temp: 33 °F
Mean Temp: 42 °F
Precipitation: 3.27"
Humidity: 58%
Dew Point: 27 °F
Wind: 15 mph
Pressure: 30.06 "Hg
Visibility: 9 mi
April Climate & Weather Averages in Hornerstown
High Temp: 63 °F
Low Temp: 42 °F
Mean Temp: 52 °F
Precipitation: 3.01"
Humidity: 57%
Dew Point: 37 °F
Wind: 14 mph
Pressure: 29.99 "Hg
Visibility: 9 mi
May Climate & Weather Averages in Hornerstown
High Temp: 72 °F
Low Temp: 52 °F
Mean Temp: 62 °F
Precipitation: 3.37"
Humidity: 64%
Dew Point: 49 °F
Wind: 12 mph
Pressure: 29.99 "Hg
Visibility: 9 mi
June Climate & Weather Averages in Hornerstown
High Temp: 81 °F
Low Temp: 61 °F
Mean Temp: 71 °F
Precipitation: 3.71"
Humidity: 67%
Dew Point: 60 °F
Wind: 11 mph
Pressure: 29.95 "Hg
Visibility: 9 mi
July Climate & Weather Averages in Hornerstown
High Temp: 86 °F
Low Temp: 67 °F
Mean Temp: 77 °F
Precipitation: 3.96"
Humidity: 66%
Dew Point: 64 °F
Wind: 10 mph
Pressure: 29.95 "Hg
Visibility: 9 mi
August Climate & Weather Averages in Hornerstown
High Temp: 84 °F
Low Temp: 65 °F
Mean Temp: 74 °F
Precipitation: 3.68"
Humidity: 69%
Dew Point: 63 °F
Wind: 9 mph
Pressure: 30.00 "Hg
Visibility: 9 mi
September Climate & Weather Averages in Hornerstown
High Temp: 77 °F
Low Temp: 58 °F
Mean Temp: 68 °F
Precipitation: 3.77"
Humidity: 70%
Dew Point: 57 °F
Wind: 10 mph
Pressure: 30.04 "Hg
Visibility: 9 mi
October Climate & Weather Averages in Hornerstown
High Temp: 66 °F
Low Temp: 46 °F
Mean Temp: 56 °F
Precipitation: 3.08"
Humidity: 69%
Dew Point: 46 °F
Wind: 11 mph
Pressure: 30.06 "Hg
Visibility: 9 mi
November Climate & Weather Averages in Hornerstown
High Temp: 55 °F
Low Temp: 36 °F
Mean Temp: 46 °F
Precipitation: 2.71"
Humidity: 65%
Dew Point: 34 °F
Wind: 12 mph
Pressure: 30.11 "Hg
Visibility: 9 mi
December Climate & Weather Averages in Hornerstown
High Temp: 45 °F
Low Temp: 29 °F
Mean Temp: 37 °F
Precipitation: 3.22"
Humidity: 66%
Dew Point: 26 °F
Wind: 12 mph
Pressure: 30.09 "Hg
Visibility: 9 mi