Weather in Joliet, IL
Joliet, Wednesday, 21 October, 16:32
Clear. Feels like 70°. High 72°, low 42°.
Monthly outlook for Joliet, IL: average high 61.7°, average low 46.6°. That is 2.6° above the climate normal for October. Precipitation is expected on 4 days (about 1.9 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 22 October (73.8°), the coolest 30 October (34.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 21 October – 30 October | 64.2° | 58.4° | +3.2° |
| 31 October – 9 November | 57.5° | 53.9° | +2° |
| 10 November – 19 November | at normal | 48.5° | — |
October records over 66 years
0Joliet, Thursday, 22 October
Clear. High 74°, low 45°.
0Joliet, Friday, 23 October
Clear. High 70°, low 47°.
0
Joliet, Saturday, 24 October
Overcast. High 68°, low 48°.
0Joliet, Sunday, 25 October
Overcast. High 69°, low 49°.
0Joliet, Monday, 26 October
Overcast. High 70°, low 49°.
0Joliet, Tuesday, 27 October
Overcast. High 61°, low 52°.
0.42
Joliet, Wednesday, 28 October
Rain. High 60°, low 47°.
0Joliet, Thursday, 29 October
Clear. High 48°, low 39°.
0.01Joliet, Friday, 30 October
Light rain. High 51°, low 35°.
0Joliet, Saturday, 31 October
Overcast. High 62°, low 48°.
0Joliet, Sunday, 1 November
Overcast. High 63°, low 51°.
0.9Joliet, Monday, 2 November
Rain. High 62°, low 54°.
0.4Joliet, Tuesday, 3 November
Rain. High 57°, low 50°.
0.17Joliet, Wednesday, 4 November
Light rain. High 47°, low 45°.
0.03Joliet, Thursday, 5 November
Light rain. High 53°, low 46°.
0.09
Joliet, Friday, 6 November
Climate normal for this date — 60-year average.
0.06Joliet, Saturday, 7 November
Climate normal for this date — 60-year average.
0.06
Joliet, 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.
0.08Joliet, Thursday, 19 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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