Climate almanac
Sugar Grove
Illinois, United States · 41.76°, -88.44°
What is the climate like in Sugar Grove?
The best time to visit Sugar Grove is typically August – September, with trip comfort peaking in August (6.9/10). Sugar Grove is warmest in July, when daily highs average 83°F (28°C), and coolest in January, when lows fall to about 19°F (-7°C). The wettest month is typically May and the driest is February; the year sees roughly 41 in (1050 mm) of precipitation.
- Best time to visitAugust – September — comfort peaks in August (6.9/10)
- Warmest monthJuly — average high 83°F (28°C)
- Coolest monthJanuary — average low 19°F (-7°C)
- Wettest monthMay (4.9 in (123 mm))
- Driest monthFebruary (2.1 in (53 mm))
- Annual precipitation41 in (1050 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromAurora Water, 11 km away (1893-2026)