Climate almanac
Bethlehem
Pennsylvania, United States · 40.63°, -75.37°
What is the climate like in Bethlehem?
The best time to visit Bethlehem is typically June, the year's most comfortable month (6.5/10). Bethlehem is warmest in July, when daily highs average 86°F (30°C), and coolest in January, when lows fall to about 26°F (-3°C). The wettest month is typically May and the driest is November; the year sees roughly 49 in (1232 mm) of precipitation.
- Best time to visitJune — the year's comfort peak (6.5/10)
- Warmest monthJuly — average high 86°F (30°C)
- Coolest monthJanuary — average low 26°F (-3°C)
- Wettest monthMay (4.8 in (122 mm))
- Driest monthNovember (3.3 in (84 mm))
- Annual precipitation49 in (1232 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromAllentown Lehigh Vly Intl AP, 7 km away (1948-2026)