Weather in Joliet, IL
Joliet, Tuesday, 20 October, 21:12
Clear. Feels like 52°. High 70°, low 42°.
Monthly outlook for Joliet, IL: average high 60.8°, average low 43.7°. That is 1.9° above the climate normal for October. Precipitation is expected on 2 days (about 0.5 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 22 October (74°), the coolest 29 October (36.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 20 October – 29 October | 64.5° | 58.6° | +3.3° |
| 30 October – 8 November | 54.7° | 54.5° | +0.1° |
| 9 November – 18 November | at normal | 49° | — |
October records over 66 years
0
Joliet, Wednesday, 21 October
Clear. High 72°, low 42°.
0Joliet, Thursday, 22 October
Clear. High 74°, low 45°.
0Joliet, Friday, 23 October
Clear. High 68°, low 48°.
0
Joliet, Saturday, 24 October
Overcast. High 68°, low 49°.
0
Joliet, Sunday, 25 October
Partly cloudy. High 71°, low 50°.
0.01
Joliet, Monday, 26 October
Light rain. High 69°, low 50°.
0.06Joliet, Tuesday, 27 October
Light rain. High 50°, low 43°.
0
Joliet, Wednesday, 28 October
Mostly clear. High 50°, low 40°.
0Joliet, Thursday, 29 October
Mostly clear. High 53°, low 36°.
0Joliet, Friday, 30 October
Clear. High 55°, low 38°.
0Joliet, Saturday, 31 October
Clear. High 61°, low 41°.
0.44Joliet, Sunday, 1 November
Rain. High 55°, low 48°.
0Joliet, Monday, 2 November
Clear. High 59°, low 46°.
0Joliet, Tuesday, 3 November
Overcast. High 50°, low 38°.
0Joliet, Wednesday, 4 November
Overcast. High 50°, low 44°.
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.
0.13
Joliet, 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.
0.07Joliet, Saturday, 14 November
Climate normal for this date — 60-year average.
0.09Joliet, Sunday, 15 November
Climate normal for this date — 60-year average.
0.05Joliet, Monday, 16 November
Climate normal for this date — 60-year average.
0.09Joliet, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.15Joliet, Wednesday, 18 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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