Weather in Joliet, IL
Joliet, Thursday, 15 October, 05:30
Overcast. Feels like 59°. High 69°, low 59°.
Monthly outlook for Joliet, IL: average high 58.7°, average low 44.1°. That is 0.3° below the climate normal for October. Precipitation is expected on 2 days (about 0.4 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 23 October (69.6°), the coolest 30 October (33°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 15 October – 24 October | 64° | 60.4° | +2° |
| 25 October – 3 November | 49.8° | 56.5° | -3.7° |
| 4 November – 13 November | at normal | 51.3° | — |
October records over 66 years
0.03
Joliet, Friday, 16 October
Light rain. High 60°, low 46°.
0
Joliet, Saturday, 17 October
Clear. High 56°, low 38°.
0Joliet, Sunday, 18 October
Clear. High 62°, low 42°.
0
Joliet, Monday, 19 October
Partly cloudy. High 64°, low 42°.
0
Joliet, Tuesday, 20 October
Mostly clear. High 66°, low 44°.
0Joliet, Wednesday, 21 October
Clear. High 67°, low 51°.
0Joliet, Thursday, 22 October
Overcast. High 67°, low 50°.
0Joliet, Friday, 23 October
Overcast. High 70°, low 52°.
0.22Joliet, Saturday, 24 October
Rain. High 60°, low 55°.
0.02Joliet, Sunday, 25 October
Light rain. High 56°, low 44°.
0Joliet, Monday, 26 October
Clear. High 49°, low 38°.
0Joliet, Tuesday, 27 October
Overcast. High 46°, low 37°.
0Joliet, Wednesday, 28 October
Overcast. High 56°, low 34°.
0.02Joliet, Thursday, 29 October
Light rain. High 49°, low 42°.
0Joliet, Friday, 30 October
Clear. High 41°, low 33°.
0.14
Joliet, Saturday, 31 October
Climate normal for this date — 60-year average.
0.17Joliet, Sunday, 1 November
Climate normal for this date — 60-year average.
0.1Joliet, Monday, 2 November
Climate normal for this date — 60-year average.
0.07Joliet, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.09Joliet, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.11Joliet, Thursday, 5 November
Climate normal for this date — 60-year average.
0.09Joliet, Friday, 6 November
Climate normal for this date — 60-year average.
0.06Joliet, Saturday, 7 November
Climate normal for this date — 60-year average.
0.06Joliet, Sunday, 8 November
Climate normal for this date — 60-year average.
0.13Joliet, Monday, 9 November
Climate normal for this date — 60-year average.
0.13Joliet, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.07Joliet, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.07Joliet, Thursday, 12 November
Climate normal for this date — 60-year average.
0.06Joliet, Friday, 13 November
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Joliet, IL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Joliet, IL since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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