Weather in Chicago, IL
Chicago, Saturday, 10 October, 08:26
Clear. Feels like 62°. High 78°, low 60°.
Monthly outlook for Chicago, IL: average high 63°, average low 50.1°. That is 1.5° above the climate normal for October. Precipitation is expected on 3 days (about 0.5 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 12 October (81.3°), the coolest 17 October (36.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 10 October – 19 October | 65.1° | 61.3° | +2.1° |
| 20 October – 29 October | 59.4° | 57.5° | +1° |
| 30 October – 8 November | at normal | 53.6° | — |
October records over 66 years
0Chicago, Sunday, 11 October
Clear. High 75°, low 61°.
0Chicago, Monday, 12 October
Clear. High 81°, low 61°.
0
Chicago, Tuesday, 13 October
Partly cloudy. High 80°, low 62°.
0.1
Chicago, Wednesday, 14 October
Light rain. High 62°, low 57°.
0
Chicago, Thursday, 15 October
Overcast. High 59°, low 54°.
0.03Chicago, Friday, 16 October
Light rain. High 64°, low 43°.
0Chicago, Saturday, 17 October
Overcast. High 45°, low 36°.
0.01Chicago, Sunday, 18 October
Light rain. High 50°, low 37°.
0Chicago, Monday, 19 October
Overcast. High 57°, low 42°.
0Chicago, Tuesday, 20 October
Overcast. High 62°, low 47°.
0.11Chicago, Wednesday, 21 October
Light rain. High 60°, low 52°.
0Chicago, Thursday, 22 October
Clear. High 65°, low 48°.
0Chicago, Friday, 23 October
Clear. High 58°, low 48°.
0Chicago, Saturday, 24 October
Overcast. High 56°, low 46°.
0.29Chicago, Sunday, 25 October
Rain. High 55°, low 46°.
0.11Chicago, Monday, 26 October
Climate normal for this date — 60-year average.
0.1
Chicago, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.06Chicago, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.06Chicago, Thursday, 29 October
Climate normal for this date — 60-year average.
0.12Chicago, Friday, 30 October
Climate normal for this date — 60-year average.
0.14Chicago, Saturday, 31 October
Climate normal for this date — 60-year average.
0.18Chicago, Sunday, 1 November
Climate normal for this date — 60-year average.
0.12Chicago, Monday, 2 November
Climate normal for this date — 60-year average.
0.07Chicago, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.09Chicago, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.12Chicago, Thursday, 5 November
Climate normal for this date — 60-year average.
0.07Chicago, Friday, 6 November
Climate normal for this date — 60-year average.
0.06Chicago, Saturday, 7 November
Climate normal for this date — 60-year average.
0.06Chicago, Sunday, 8 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 Chicago, 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 Chicago, 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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