Weather in Deer Park, IL
Deer Park, Thursday, 22 October, 04:50
Overcast. Feels like 49°. High 73°, low 48°.
Monthly outlook for Deer Park, IL: average high 60.2°, average low 47.6°. That is 3.7° above the climate normal for October. Precipitation is expected on 3 days (about 1.0 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 22 October (73.2°), the coolest 3 November (42°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 22 October – 31 October | 63.8° | 54.8° | +5° |
| 1 November – 10 November | 54.2° | 50.6° | +2° |
| 11 November – 20 November | at normal | 45.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Highwood (14 mi).
0Deer Park, Friday, 23 October
Overcast. High 71°, low 46°.
0Deer Park, Saturday, 24 October
Overcast. High 66°, low 49°.
0
Deer Park, Sunday, 25 October
Partly cloudy. High 70°, low 52°.
0Deer Park, Monday, 26 October
Overcast. High 63°, low 51°.
0.04
Deer Park, Tuesday, 27 October
Light rain. High 60°, low 52°.
0Deer Park, Wednesday, 28 October
Overcast. High 57°, low 49°.
0.02Deer Park, Thursday, 29 October
Light rain. High 60°, low 48°.
0.18Deer Park, Friday, 30 October
Light rain. High 60°, low 53°.
0.75Deer Park, Saturday, 31 October
Rain. High 59°, low 49°.
0
Deer Park, Sunday, 1 November
Clear. High 61°, low 46°.
0Deer Park, Monday, 2 November
Overcast. High 54°, low 44°.
0Deer Park, Tuesday, 3 November
Overcast. High 53°, low 42°.
0Deer Park, Wednesday, 4 November
Overcast. High 51°, low 44°.
0Deer Park, Thursday, 5 November
Overcast. High 52°, low 44°.
0Deer Park, Friday, 6 November
Overcast. High 54°, low 44°.
0.05
Deer 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.
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.
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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