Weather in Deer Park, IL
Deer Park, Friday, 30 October, 10:30
Mostly clear. Feels like 50°. High 56°, low 42°.
Monthly outlook for Deer Park, IL: average high 54.3°, average low 46.3°. That is 2.5° above the climate normal for October. Precipitation is expected on 6 days (about 1.9 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 3 November (68.2°), the coolest 11 November (35.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 30 October – 8 November | 57.9° | 51.7° | +3.4° |
| 9 November – 18 November | 48.4° | 46.4° | +1.1° |
| 19 November – 28 November | at normal | 42.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Highwood (14 mi).
0.4
Deer Park, Saturday, 31 October
Rain. High 64°, low 51°.
0
Deer Park, Sunday, 1 November
Overcast. High 62°, low 54°.
0.01Deer Park, Monday, 2 November
Light rain. High 62°, low 55°.
0.02Deer Park, Tuesday, 3 November
Light rain. High 68°, low 62°.
0.58Deer Park, Wednesday, 4 November
Rain. High 64°, low 58°.
0.13Deer Park, Thursday, 5 November
Light rain. High 55°, low 51°.
0Deer Park, Friday, 6 November
Overcast. High 50°, low 46°.
0Deer Park, Saturday, 7 November
Mostly clear. High 50°, low 38°.
0Deer Park, Sunday, 8 November
Overcast. High 47°, low 39°.
0Deer Park, Monday, 9 November
Light rain. High 49°, low 43°.
0.08Deer Park, Tuesday, 10 November
Light rain. High 47°, low 43°.
0
Deer Park, Wednesday, 11 November
Clear. High 49°, low 35°.
0Deer Park, Thursday, 12 November
Clear. High 50°, low 36°.
0.16Deer Park, Friday, 13 November
Light rain. High 46°, low 43°.
0.48Deer Park, Saturday, 14 November
Rain. High 50°, low 45°.
0.09
Deer 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.
0.07Deer Park, Thursday, 19 November
Climate normal for this date — 60-year average.
0.08Deer Park, Friday, 20 November
Climate normal for this date — 60-year average.
0.11Deer Park, Saturday, 21 November
Climate normal for this date — 60-year average.
0.04Deer Park, Sunday, 22 November
Climate normal for this date — 60-year average.
0.08Deer Park, Monday, 23 November
Climate normal for this date — 60-year average.
0.08Deer Park, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.09
Deer Park, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.12Deer Park, Thursday, 26 November
Climate normal for this date — 60-year average.
0.21Deer Park, Friday, 27 November
Climate normal for this date — 60-year average.
0.12Deer Park, Saturday, 28 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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