Weather & Average Temperature
Discover the average temperatures by month in Lehigh Valley with our weather and forecast guide.
The Lehigh Valley region sets the perfect weather for any type of adventure, whether you’re looking for things to do on a rainy day or embarking on an outdoor journey. Lehigh Valley has four seasons, from humid summers and chilly winters to brief and moderate springs and falls. Explore the average temperatures in Lehigh Valley in the fall, winter, spring, and summer.
Average Temperatures & Precipitation in Lehigh Valley
Lehigh Valley’s warm season typically occurs from late May to mid-September with an average high temperature that’s over 75°F. Lehigh Valley’s hottest month of the year is July, consisting of an average high temperature of 85°F and an average low temperature of 64°F. The chilliest months run from early December to early March, with an average high temperature that is lower than 46°F. We recommend bundling up for the chilliest month, January—the average high temperature is 37°F and the average low is 21°F.
Although precipitation may vary during the year, the dry months are generally from August to April, while the wet season is from April to August. May has the highest average rainfall of nine days.
| Month |
Average High / Low
|
Average Rainfall
|
|
January
|
37°F / 21°F
|
7 Days
|
|
February
|
41°F / 23°F
|
7 Days
|
|
March
|
50°F / 30°F
|
8 Days
|
|
April
|
62°F / 40 °F
|
8 Days
|
|
May
|
73°F / 50 °F
|
9 Days
|
|
June
|
81°F / 59°F
|
8 Days
|
|
July
|
85°F / 64°F
|
8 Days
|
|
August
|
83°F / 62°F
|
8 Days
|
|
September
|
76°F / 54°F
|
7 Days
|
|
October
|
64°F / 43°F
|
7 Days
|
|
November
|
53°F / 34°F
|
7 Days
|
|
December
|
42°F / 26°F
|
8 Days
|
Source: National Centers for Environmental Information
What to Pack
- December - March: Brisk and chilly days call for coats, scarves, gloves, and thermals. Layers are essential during these months! As you enjoy Lehigh Valley in the winter, make sure to stay warm with thick fabrics and knits—a cup of coffee wouldn’t hurt, either.
- April - May: The plants are blooming and the days are getting longer during springtime! Pack a light jacket, pants, and a combination of short- and long-sleeve shirts.
- June - August: Along with shorts, t-shirts, swimwear, and sandals, don’t forget the sunscreen! Lehigh Valley is a summer haven with annual festivals and fun water activities. Wear light and breathable fabrics like cotton and linen.
- September - November: Enjoy the stunning fall foliage and autumnal events with a mixture of warm and breathable layers. The fall mornings and nights are a little colder than the afternoons. Pack a light coat, pants, sweaters, and other layerable clothing.
The Best Time to Visit Lehigh Valley
Lehigh Valley is a year-round destination for any type of activity. From holiday festivities and annual celebrations to outdoor trips and culinary experiences, there’s a season for every visitor. Venture through a snowy wonderland during the winter months, where festive occasions, and skiing and snowboarding excursions await. The summer season entails farmers markets, paddling activities, baseball games, and more. The spring temperatures give way to scenic hikes around verdant greenery, while the fall is a charming time for pumpkin patches, apple cider, and corn mazes.
