Monticello

What is the climate like in Monticello?

The best time to visit Monticello is typically August – September, with trip comfort peaking in September (7.2/10). Monticello is warmest in July, when daily highs average 85°F (29°C), and coolest in January, when lows fall to about 23°F (-5°C). The wettest month is typically April and the driest is December; the year sees roughly 42 in (1079 mm) of precipitation.

• Best time to visitAugust – September — comfort peaks in September (7.2/10)
• Warmest monthJuly — average high 85°F (29°C)
• Coolest monthJanuary — average low 23°F (-5°C)
• Wettest monthApril (5.0 in (126 mm))
• Driest monthDecember (2.4 in (62 mm))
• Annual precipitation42 in (1079 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromChampaign 9 Sw, 17 km away (2002-2026)