Best Time to Visit Joliet
Best time: Jul, Jun, May, Aug.
Jul is warmest (30.1°C high); Jun is rainiest (104 mm).
Joliet weather by month
| Month | High °C | Low °C | Rain mm | Sun hrs |
|---|---|---|---|---|
| Jan | -0.8 | -10.1 | 38 | 2.5 |
| Feb | 2.4 | -7.4 | 36 | 4 |
| Mar | 8.8 | -1.6 | 69 | 5.8 |
| Apr | 15.9 | 3.8 | 98 | 7.3 |
| May | 22.7 | 9.6 | 98 | 8.7 |
| Jun | 28 | 15.1 | 104 | 9.7 |
| Jul | 30.1 | 17.8 | 101 | 9.7 |
| Aug | 28.7 | 16.8 | 96 | 8.4 |
| Sep | 25 | 12.2 | 94 | 6.9 |
| Oct | 18.2 | 5.7 | 67 | 4.7 |
| Nov | 9.4 | -0.2 | 74 | 2.7 |
| Dec | 2.3 | -6.4 | 62 | 2.1 |
Average high temperature
Best months by activity
Overall: JulJunMayAug
Beaches: JulAugJun
Hiking: OctMaySep
Sightseeing: JulJunMayAug
Joliet quick facts
What to pack
Cold months (Jan, Feb, Mar, Nov, Dec): warm layers and a coat.
Wet months (Apr, May, Jun, Jul, Aug, Sep): raincoat and umbrella.
Frequently asked questions
When is the best time to visit Joliet?
Jul, Jun, May, Aug.
What is the rainiest month?
Jun, about 104 mm.
What is the warmest month?
Jul, with average highs of 30.1°C.
Where to stay
See Joliet hotels · Book Joliet tours & activities
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Climate data: Open-Meteo Historical (ERA5), 1991–2020 climate normals.
Licensed under CC BY 4.0.
Open-Meteo.