Weather in Joliet, IL
Joliet, Thursday, 15 October, 11:20
Overcast. Feels like 60°. High 69°, low 58°.
Monthly outlook for Joliet, IL: average high 66.3°, average low 52.1°. That is 4° above the climate normal for October. Precipitation is expected on 5 days (about 1.6 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 27 October (73.2°), the coolest 17 October (37.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 15 October – 24 October | 66.2° | 60.4° | +3.3° |
| 25 October – 3 November | 66.5° | 56.5° | +5.5° |
| 4 November – 13 November | at normal | 51.3° | — |
October records over 66 years
0.04
Joliet, Friday, 16 October
Light rain. High 61°, low 46°.
0
Joliet, Saturday, 17 October
Clear. High 56°, low 38°.
0Joliet, Sunday, 18 October
Clear. High 62°, low 42°.
0Joliet, Monday, 19 October
Overcast. High 64°, low 43°.
0.02Joliet, Tuesday, 20 October
Light rain. High 67°, low 48°.
0
Joliet, Wednesday, 21 October
Partly cloudy. High 69°, low 55°.
0Joliet, Thursday, 22 October
Clear. High 71°, low 53°.
0Joliet, Friday, 23 October
Partly cloudy. High 72°, low 55°.
0Joliet, Saturday, 24 October
Overcast. High 71°, low 57°.
0Joliet, Sunday, 25 October
Clear. High 63°, low 51°.
0Joliet, Monday, 26 October
Overcast. High 65°, low 48°.
0.03Joliet, Tuesday, 27 October
Light rain. High 73°, low 60°.
0.12Joliet, Wednesday, 28 October
Light rain. High 61°, low 59°.
0.05Joliet, Thursday, 29 October
Light rain. High 64°, low 60°.
1.15Joliet, Friday, 30 October
Rain. High 73°, low 62°.
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.
0.06
Joliet, 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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