Climate almanac
Buffalo Grove
Illinois, United States · 42.15°, -87.96°
What is the climate like in Buffalo Grove?
The best time to visit Buffalo Grove is typically June – September, with trip comfort peaking in September (7.0/10). Buffalo Grove is warmest in July, when daily highs average 80°F (27°C), and coolest in January, when lows fall to about 21°F (-6°C). The wettest month is typically May and the driest is February; the year sees roughly 40 in (1024 mm) of precipitation.
- Best time to visitJune – September — comfort peaks in September (7.0/10)
- Warmest monthJuly — average high 80°F (27°C)
- Coolest monthJanuary — average low 21°F (-6°C)
- Wettest monthMay (4.9 in (123 mm))
- Driest monthFebruary (2.2 in (56 mm))
- Annual precipitation40 in (1024 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromChicago Palwaukee AP, 6 km away (1996-2026)