Climate almanac

Bethlehem

Pennsylvania, United States · 40.63°, -75.37°

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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)