Weather in Forest Park, IL
Forest Park, Monday, 19 October, 07:23
Clear. Feels like 44°. High 67°, low 43°.
Monthly outlook for Forest Park, IL: average high 61.9°, average low 47.3°. That is 2.9° above the climate normal for October. Precipitation is expected on 2 days (about 0.9 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 26 October (69.7°), the coolest 29 October (38.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 19 October – 28 October | 64.6° | 57.8° | +3.8° |
| 29 October – 7 November | 57.5° | 54° | +2° |
| 8 November – 17 November | at normal | 48.3° | — |
October records over 66 years
0Forest Park, Tuesday, 20 October
Clear. High 67°, low 47°.
0Forest Park, Wednesday, 21 October
Clear. High 66°, low 45°.
0
Forest Park, Thursday, 22 October
Overcast. High 68°, low 49°.
0
Forest Park, Friday, 23 October
Partly cloudy. High 64°, low 48°.
0Forest Park, Saturday, 24 October
Overcast. High 64°, low 46°.
0Forest Park, Sunday, 25 October
Overcast. High 69°, low 61°.
0Forest Park, Monday, 26 October
Partly cloudy. High 70°, low 54°.
0.63
Forest Park, Tuesday, 27 October
Rain. High 65°, low 47°.
0.01Forest Park, Wednesday, 28 October
Light rain. High 46°, low 42°.
0Forest Park, Thursday, 29 October
Clear. High 48°, low 38°.
0Forest Park, Friday, 30 October
Clear. High 51°, low 39°.
0Forest Park, Saturday, 31 October
Overcast. High 53°, low 41°.
0Forest Park, Sunday, 1 November
Overcast. High 64°, low 48°.
0Forest Park, Monday, 2 November
Overcast. High 65°, low 54°.
0.27Forest Park, Tuesday, 3 November
Rain. High 63°, low 54°.
0.09Forest Park, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.12Forest Park, Thursday, 5 November
Climate normal for this date — 60-year average.
0.07Forest Park, Friday, 6 November
Climate normal for this date — 60-year average.
0.06Forest Park, Saturday, 7 November
Climate normal for this date — 60-year average.
0.06Forest Park, Sunday, 8 November
Climate normal for this date — 60-year average.
0.13
Forest Park, Monday, 9 November
Climate normal for this date — 60-year average.
0.13Forest Park, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.08Forest Park, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.06Forest Park, Thursday, 12 November
Climate normal for this date — 60-year average.
0.06Forest Park, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Forest Park, Saturday, 14 November
Climate normal for this date — 60-year average.
0.1Forest Park, Sunday, 15 November
Climate normal for this date — 60-year average.
0.05Forest Park, Monday, 16 November
Climate normal for this date — 60-year average.
0.09Forest Park, 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 Forest Park, 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 Forest Park, 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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