Climate almanac

Union

South Carolina, United States · 34.72°, -81.62°

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What is the climate like in Union?

The best time to visit Union is typically September – October, with trip comfort peaking in October (7.2/10). Union is warmest in July, when daily highs average 91°F (33°C), and coolest in January, when lows fall to about 37°F (3°C). The wettest month is typically August and the driest is November; the year sees roughly 48 in (1223 mm) of precipitation.

  • Best time to visitSeptember – October — comfort peaks in October (7.2/10)
  • Warmest monthJuly — average high 91°F (33°C)
  • Coolest monthJanuary — average low 37°F (3°C)
  • Wettest monthAugust (5.3 in (134 mm))
  • Driest monthNovember (3.0 in (77 mm))
  • Annual precipitation48 in (1223 mm)
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
  • Records fromSantuck, 13 km away (1895-2026)