Weather in Oak Forest, IL
Oak Forest, Monday, 19 October, 07:31
Clear. Feels like 40°. High 67°, low 41°.
Monthly outlook for Oak Forest, IL: average high 61.3°, average low 45.4°. That is 2.4° above the climate normal for October. Precipitation is expected on 3 days (about 0.9 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 26 October (68.6°), the coolest 31 October (36.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 19 October – 28 October | 64.2° | 58° | +3.4° |
| 29 October – 7 November | 56.5° | 54.3° | +1.2° |
| 8 November – 17 November | at normal | 48.7° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Orland Hills (5 mi).
0Oak Forest, Tuesday, 20 October
Clear. High 67°, low 45°.
0Oak Forest, Wednesday, 21 October
Clear. High 67°, low 45°.
0
Oak Forest, Thursday, 22 October
Partly cloudy. High 68°, low 48°.
0Oak Forest, Friday, 23 October
Partly cloudy. High 64°, low 47°.
0Oak Forest, Saturday, 24 October
Partly cloudy. High 64°, low 45°.
0
Oak Forest, Sunday, 25 October
Overcast. High 67°, low 58°.
0Oak Forest, Monday, 26 October
Partly cloudy. High 69°, low 51°.
0.44
Oak Forest, Tuesday, 27 October
Rain. High 64°, low 46°.
0.07Oak Forest, Wednesday, 28 October
Light rain. High 46°, low 41°.
0
Oak Forest, Thursday, 29 October
Mostly clear. High 47°, low 37°.
0Oak Forest, Friday, 30 October
Clear. High 51°, low 37°.
0Oak Forest, Saturday, 31 October
Overcast. High 52°, low 37°.
0Oak Forest, Sunday, 1 November
Overcast. High 63°, low 45°.
0Oak Forest, Monday, 2 November
Overcast. High 63°, low 52°.
0.43Oak Forest, Tuesday, 3 November
Rain. High 62°, low 52°.
0.09Oak Forest, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.12Oak Forest, Thursday, 5 November
Climate normal for this date — 60-year average.
0.07
Oak Forest, Friday, 6 November
Climate normal for this date — 60-year average.
0.06Oak Forest, Saturday, 7 November
Climate normal for this date — 60-year average.
0.06Oak Forest, Sunday, 8 November
Climate normal for this date — 60-year average.
0.13Oak Forest, Monday, 9 November
Climate normal for this date — 60-year average.
0.14Oak Forest, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.07Oak Forest, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.06Oak Forest, Thursday, 12 November
Climate normal for this date — 60-year average.
0.06Oak Forest, Friday, 13 November
Climate normal for this date — 60-year average.
0.08Oak Forest, Saturday, 14 November
Climate normal for this date — 60-year average.
0.09Oak Forest, Sunday, 15 November
Climate normal for this date — 60-year average.
0.05Oak Forest, Monday, 16 November
Climate normal for this date — 60-year average.
0.09Oak Forest, Tuesday, 17 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 Oak Forest, 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 Oak Forest, 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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