Weather in Chicago, IL
Chicago, Thursday, 8 October, 19:05
Partly cloudy. Feels like 62°. High 72°, low 49°.
Monthly outlook for Chicago, IL: average high 68.2°, average low 54.1°. That is 3.9° above the climate normal for October. Precipitation is expected on 6 days (about 1.8 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 12 October (79.9°), the coolest 18 October (45.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 October – 17 October | 70° | 62.6° | +4.2° |
| 18 October – 27 October | 65.2° | 58.1° | +3.9° |
| 28 October – 6 November | at normal | 54.4° | — |
October records over 66 years
0.07
Chicago, Friday, 9 October
Light rain. High 75°, low 52°.
0
Chicago, Saturday, 10 October
Overcast. High 76°, low 59°.
0
Chicago, Sunday, 11 October
Clear. High 70°, low 57°.
0.02Chicago, Monday, 12 October
Light rain. High 80°, low 57°.
0.43Chicago, Tuesday, 13 October
Rain. High 67°, low 56°.
0.11Chicago, Wednesday, 14 October
Light rain. High 65°, low 54°.
1Chicago, Thursday, 15 October
Heavy rain. High 76°, low 68°.
0.08Chicago, Friday, 16 October
Light rain. High 67°, low 55°.
0Chicago, Saturday, 17 October
Clear. High 54°, low 46°.
0Chicago, Sunday, 18 October
Clear. High 57°, low 46°.
0Chicago, Monday, 19 October
Clear. High 61°, low 48°.
0
Chicago, Tuesday, 20 October
Partly cloudy. High 68°, low 51°.
0.13Chicago, Wednesday, 21 October
Light rain. High 68°, low 57°.
0Chicago, Thursday, 22 October
Clear. High 69°, low 55°.
0Chicago, Friday, 23 October
Clear. High 68°, low 56°.
0.12
Chicago, Saturday, 24 October
Climate normal for this date — 60-year average.
0.14Chicago, Sunday, 25 October
Climate normal for this date — 60-year average.
0.11Chicago, Monday, 26 October
Climate normal for this date — 60-year average.
0.1Chicago, 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.
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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