Weather in River Forest, IL
River Forest, Sunday, 11 October, 16:54
Clear. Feels like 77°. High 77°, low 54°.
Monthly outlook for River Forest, IL: average high 65.3°, average low 53.4°. That is 3° above the climate normal for October. Precipitation is expected on 5 days (about 4.2 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 12 October (85°), the coolest 17 October (39.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 11 October – 20 October | 66.6° | 61° | +3.1° |
| 21 October – 30 October | 63.3° | 57.2° | +3.4° |
| 31 October – 9 November | at normal | 53° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Oak Park (2 mi).
0River Forest, Monday, 12 October
Clear. High 85°, low 65°.
0River Forest, Tuesday, 13 October
Clear. High 80°, low 66°.
0.55
River Forest, Wednesday, 14 October
Heavy rain. High 67°, low 60°.
1.87River Forest, Thursday, 15 October
Heavy rain. High 60°, low 57°.
0River Forest, Friday, 16 October
Light rain. High 58°, low 47°.
0River Forest, Saturday, 17 October
Clear. High 50°, low 39°.
0River Forest, Sunday, 18 October
Clear. High 58°, low 40°.
0River Forest, Monday, 19 October
Clear. High 65°, low 48°.
0
River Forest, Tuesday, 20 October
Overcast. High 66°, low 53°.
0River Forest, Wednesday, 21 October
Overcast. High 69°, low 58°.
0.04River Forest, Thursday, 22 October
Light rain. High 74°, low 63°.
0.91River Forest, Friday, 23 October
Rain. High 64°, low 61°.
0.79River Forest, Saturday, 24 October
Rain. High 63°, low 51°.
0River Forest, Sunday, 25 October
Overcast. High 54°, low 49°.
0
River Forest, Monday, 26 October
Partly cloudy. High 55°, low 43°.
0.1
River Forest, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.06River Forest, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.06River Forest, Thursday, 29 October
Climate normal for this date — 60-year average.
0.11River Forest, Friday, 30 October
Climate normal for this date — 60-year average.
0.14River Forest, Saturday, 31 October
Climate normal for this date — 60-year average.
0.16River Forest, Sunday, 1 November
Climate normal for this date — 60-year average.
0.12River Forest, Monday, 2 November
Climate normal for this date — 60-year average.
0.06River Forest, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.09River Forest, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.12River Forest, Thursday, 5 November
Climate normal for this date — 60-year average.
0.07River Forest, Friday, 6 November
Climate normal for this date — 60-year average.
0.05River Forest, Saturday, 7 November
Climate normal for this date — 60-year average.
0.06
River Forest, Sunday, 8 November
Climate normal for this date — 60-year average.
0.11River Forest, Monday, 9 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 River 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 River 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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