Climate almanac
Joliet
Illinois, US · 41.53°, -88.08°
What is the climate like in Joliet?
The best time to visit Joliet is typically August – September, with trip comfort peaking in September (7.1/10). Joliet is warmest in July, when daily highs average 84°F (29°C), and coolest in January, when lows fall to about 21°F (-6°C). The wettest month is typically May and the driest is November; the year sees roughly 43 in of precipitation.
- Best time to visitAugust – September — comfort peaks in September (7.1/10)
- Warmest monthJuly — average high 84°F (29°C)
- Coolest monthJanuary — average low 21°F (-6°C)
- Wettest monthMay (5.1 in)
- Driest monthNovember (2.3 in)
- Annual precipitation43 in