Allentown (PA), United States of America - Weather and Climate
The climate in Allentown, Pennsylvania, United States of America, is marked by big temperature swings throughout the year.
Temperatures range from warm during the warmest months
to cold in the cooler months.
It also has a relatively rain/snowy climate with high levels of precipitation.
Now, let’s explore all the climate details to give you a complete picture.
Average maximum day and minimum night temperature
In Allentown, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 30°C in July to a chilly 3°C in January.
Nighttime temperatures can drop, with average lows reaching -6°C in January.Check out our detailed temperature page for more information.
Temperature ranges by month
Precipitation and rainy days
Allentown experiences significant rain/snowfall throughout the year, averaging 1294 mm of precipitation annually. The amount of precipitation varies moderately throughout the year. The wettest month, June, sees around 145 mm of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, November, still receives a respectable 72 mm of rainfall.
The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Daily percentage of sunshine
Average humidity
The relative humidity is high throughout the year in Allentown.
The city experiences its highest humidity in September, reaching 74%. In April, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Forecast for Allentown (PA)
Select a Month of Interest
Check the conditions for any month of the year.
The best time of year to visit Allentown in the United States of America
During the months of May and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
The hottest season / summer takes place in June, July, August and September.
July has an average maximum temperature of 30°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 3°C.
June tops the wettest month list with 145 mm of rainfall.
November is the driest month with 72 mm of precipitation.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
