July in Bethlehem averages a daily high of 29.8°C with nights around 17.8°C. Expect roughly 10.9 wet days totalling 132.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Bethlehem is May–June.
Based on ALLENTOWN LEHIGH VALLEY INTERNATIONAL AIRPORT, PA US (7km), 1995–2024. 30 years of July data.