Weather in Deer Park, IL
Deer Park, Tuesday, 20 October, 12:54
Clear. Feels like 65°. High 67°, low 41°.
Monthly outlook for Deer Park, IL: average high 56.9°, average low 41.1°. That is 1.4° above the climate normal for October. Precipitation is expected on 3 days (about 0.7 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 21 October (71°), the coolest 28 October (29.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 20 October – 29 October | 60.4° | 55.5° | +2.7° |
| 30 October – 8 November | 51.1° | 51.7° | -0.3° |
| 9 November – 18 November | at normal | 46.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Highwood (14 mi).
0Deer Park, Wednesday, 21 October
Clear. High 71°, low 43°.
0
Deer Park, Thursday, 22 October
Mostly clear. High 67°, low 47°.
0Deer Park, Friday, 23 October
Clear. High 63°, low 49°.
0Deer Park, Saturday, 24 October
Mostly clear. High 65°, low 47°.
0
Deer Park, Sunday, 25 October
Overcast. High 67°, low 53°.
0.28
Deer Park, Monday, 26 October
Rain. High 66°, low 39°.
0.04Deer Park, Tuesday, 27 October
Light rain. High 45°, low 35°.
0Deer Park, Wednesday, 28 October
Clear. High 45°, low 29°.
0Deer Park, Thursday, 29 October
Clear. High 47°, low 36°.
0Deer Park, Friday, 30 October
Clear. High 42°, low 32°.
0
Deer Park, Saturday, 31 October
Partly cloudy. High 47°, low 31°.
0Deer Park, Sunday, 1 November
Overcast. High 49°, low 42°.
0Deer Park, Monday, 2 November
Clear. High 57°, low 38°.
0Deer Park, Tuesday, 3 November
Overcast. High 59°, low 45°.
0.42Deer Park, Wednesday, 4 November
Rain. High 54°, low 50°.
0.12Deer Park, Thursday, 5 November
Climate normal for this date — 60-year average.
0.09Deer Park, Friday, 6 November
Climate normal for this date — 60-year average.
0.05Deer Park, Saturday, 7 November
Climate normal for this date — 60-year average.
0.06Deer Park, Sunday, 8 November
Climate normal for this date — 60-year average.
0.12
Deer Park, Monday, 9 November
Climate normal for this date — 60-year average.
0.11Deer Park, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.08Deer Park, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.06Deer Park, Thursday, 12 November
Climate normal for this date — 60-year average.
0.05Deer Park, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Deer Park, Saturday, 14 November
Climate normal for this date — 60-year average.
0.09Deer Park, Sunday, 15 November
Climate normal for this date — 60-year average.
0.05Deer Park, Monday, 16 November
Climate normal for this date — 60-year average.
0.09Deer Park, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.11Deer Park, Wednesday, 18 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 Deer 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 Deer 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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