Climate averages 1991–2020
Joliet weather
in June.
A warm, wet month: the 3rd warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
June is a warm month in Joliet: daytime highs average 26.3°C and nights cool to about 16.6°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 110 mm of rain on roughly 12 days, which makes June a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 08 min on an average June day.
The nearest other city in this atlas is Bolingbrook (19 km away). In June its highs average 25.7°C, 0.6°C cooler than Joliet, with 106 mm of rain.
Among the 498 cities listed in the United States, Joliet ranks joint 306th of 498 for the warmest June highs and joint 402nd of 498 for the driest June (rainfall, lowest first). The mean June high of those 498 cities is 27.9°C; Joliet is 1.6°C cooler than that mean.
From June to July, average highs rise by 2.0°C to 28.2°C, and monthly rainfall falls from 110 mm to 95 mm.
The annual picture
June in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Joliet climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -0.2°C-8.1°C | -8.1°C | 58 | 8.6 | 9.510 h |
| February | 2.4°C-6.5°C | -6.5°C | 51 | 7.2 | 10.611 h |
| March | 8.7°C-1.2°C | -1.2°C | 72 | 10.2 | 11.912 h |
| April | 15.4°C4.8°C | 4.8°C | 112 | 12.4 | 13.313 h |
| May | 21.2°C11.0°C | 11.0°C | 116 | 12.5 | 14.514 h |
| June, selected | 26.3°C16.6°C | 16.6°C | 110 | 11.7 | 15.115 h |
| July | 28.2°C19.1°C | 19.1°C | 95 | 11.3 | 14.915 h |
| August | 27.4°C18.5°C | 18.5°C | 93 | 10.2 | 13.814 h |
| September | 23.8°C14.5°C | 14.5°C | 75 | 8.3 | 12.513 h |
| October | 16.9°C8.2°C | 8.2°C | 81 | 9.2 | 11.111 h |
| November | 9.1°C1.4°C | 1.4°C | 69 | 8.6 | 9.910 h |
| December | 2.6°C-4.5°C | -4.5°C | 56 | 8.2 | 9.29 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
June in nearby cities
- Bolingbrook in JuneUnited States · 19 kmHigh 25.7°C · Low 16.2°C · 106 mm rain
- Naperville in JuneUnited States · 29 kmHigh 25.6°C · Low 16.2°C · 108 mm rain
- Aurora (Illinois), United States in JuneUnited States · 33 kmHigh 25.8°C · Low 16.2°C · 108 mm rain
- Cicero in JuneUnited States · 45 kmHigh 25.4°C · Low 16.8°C · 102 mm rain
- Hammond in JuneUnited States · 49 kmHigh 25.0°C · Low 17.5°C · 102 mm rain
- Chicago in JuneUnited States · 51 kmHigh 24.6°C · Low 17.2°C · 102 mm rain
- Schaumburg in JuneUnited States · 57 kmHigh 25.5°C · Low 16.0°C · 99 mm rain
- Elgin in JuneUnited States · 59 kmHigh 25.8°C · Low 16.2°C · 106 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Joliet) is explained once on the Joliet year overview and on the Sources, method and limits page.