Sullivan

What is the climate like in Sullivan?

The best time to visit Sullivan is typically September – October, with trip comfort peaking in September (7.4/10). Sullivan is warmest in July, when daily highs average 88°F (31°C), and coolest in January, when lows fall to about 27°F (-3°C). The wettest month is typically May and the driest is December; the year sees roughly 45 in (1137 mm) of precipitation.

• Best time to visitSeptember – October — comfort peaks in September (7.4/10)
• Warmest monthJuly — average high 88°F (31°C)
• Coolest monthJanuary — average low 27°F (-3°C)
• Wettest monthMay (6.0 in (152 mm))
• Driest monthDecember (2.0 in (52 mm))
• Annual precipitation45 in (1137 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromSullivan Missouri, 3 km away (2003-2026)