Weather in Forest Park, IL
Forest Park, Wednesday, 21 October, 12:40
Clear. Feels like 68°. High 69°, low 42°.
Monthly outlook for Forest Park, IL: average high 64.5°, average low 51.7°. That is 4.7° above the climate normal for October. Precipitation is expected on 7 days (about 3.7 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 22 October (71.9°), the coolest 21 October (41.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 21 October – 30 October | 66.5° | 57.2° | +5.2° |
| 31 October – 9 November | 61° | 53° | +4.5° |
| 10 November – 19 November | at normal | 47.5° | — |
October records over 66 years
0Forest Park, Thursday, 22 October
Clear. High 72°, low 46°.
0Forest Park, Friday, 23 October
Clear. High 68°, low 47°.
0
Forest Park, Saturday, 24 October
Partly cloudy. High 66°, low 49°.
0
Forest Park, Sunday, 25 October
Overcast. High 68°, low 51°.
0Forest Park, Monday, 26 October
Overcast. High 69°, low 52°.
0Forest Park, Tuesday, 27 October
Overcast. High 61°, low 54°.
0.03
Forest Park, Wednesday, 28 October
Light rain. High 70°, low 57°.
0.05Forest Park, Thursday, 29 October
Light rain. High 65°, low 50°.
0Forest Park, Friday, 30 October
Overcast. High 56°, low 49°.
0.12Forest Park, Saturday, 31 October
Light rain. High 63°, low 51°.
1.07Forest Park, Sunday, 1 November
Rain. High 61°, low 58°.
1.09Forest Park, Monday, 2 November
Rain. High 61°, low 59°.
0.7Forest Park, Tuesday, 3 November
Rain. High 62°, low 58°.
0.46Forest Park, Wednesday, 4 November
Light rain. High 66°, low 55°.
0.17Forest Park, Thursday, 5 November
Light rain. High 53°, low 50°.
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.
0.15Forest Park, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.08Forest Park, Thursday, 19 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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