Bethlehem (PA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Bethlehem.
Climate overview of Bethlehem
Temperatures in Bethlehem, Pennsylvania, United States of America, vary greatly throughout the year. July is the hottest month at 30°C (86°F), while January is the coldest at 3°C (37°F).
The city receives considerable rain/snowfall, with around 1253 mm (49 in) annually. June is the wettest month. It has warm summers and cold winters.
Bethlehem Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Bethlehem - and find the best time to visit.
Monthly Temperature in Bethlehem
The climate in Bethlehem is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 30°C (86°F) in July to a chilly 3°C (37°F) in the coolest month, January.
Nights vary from 18°C (64°F) in July to around -6°C (21°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Bethlehem
Bethlehem has a notably wet climate with abundant precipitation, recording 1253 mm (49 in) of rain/snowfall per year. Bethlehem offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between the wettest month June (141 mm (5.6 in)) and the driest month November (71 mm (2.8 in)) is not too significant. For more details, please visit our Bethlehem Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Bethlehem
Daily percentage of sunshine
Humidity in Bethlehem by Month
The relative humidity is high throughout the year in Bethlehem.
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
Best Time to Visit Bethlehem
Each month is rated for comfortable sightseeing weather — mild temperatures and low rainfall. Tap a month for its full averages; your ideal time may differ for a beach or winter trip (see below).
- Best overall: May
- Warmest weather: July and August
- Fewest rainy days: March, September and November
- Climate seasons: warm summers and cold winters
- Best for winter weather: January, with freezing nights around -6°C (21°F).
Frequently asked questions about the climate in Bethlehem
What is the best time to visit Bethlehem?
May typically offers the most optimal weather in Bethlehem. In contrast, January, February, March and December tend to have less optimal conditions. Bethlehem has warm summers and cold winters.
What temperatures can I expect in Bethlehem?
Daytime highs range from 3°C (37°F) in January to 30°C (86°F) in July. Nighttime lows range from -6°C (21°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Bethlehem get?
Annual rainfall is around 1253 mm (49 in). June is the wettest month with 141 mm (5.6 in), while November is the driest with 71 mm (2.8 in).
Bethlehem 3-Day Forecast
Bethlehem (PA) 3-Day Forecast
Bethlehem on the map
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