Weather in Deer Park, IL
Deer Park, Sunday, 18 October, 16:11
Clear. Feels like 61°. High 63°, low 40°.
Monthly outlook for Deer Park, IL: average high 61.6°, average low 47.7°. That is 3.6° above the climate normal for October. Precipitation is expected on 3 days (about 1.1 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 24 October (67.7°), the coolest 2 November (40.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 63° | 56.2° | +3.8° |
| 28 October – 6 November | 59.1° | 52.4° | +3.7° |
| 7 November – 16 November | at normal | 47.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Highwood (14 mi).
0Deer Park, Monday, 19 October
Clear. High 66°, low 43°.
0
Deer Park, Tuesday, 20 October
Mostly clear. High 63°, low 46°.
0Deer Park, Wednesday, 21 October
Clear. High 65°, low 45°.
0
Deer Park, Thursday, 22 October
Light rain. High 65°, low 48°.
0Deer Park, Friday, 23 October
Clear. High 62°, low 50°.
0
Deer Park, Saturday, 24 October
Overcast. High 68°, low 48°.
0Deer Park, Sunday, 25 October
Overcast. High 65°, low 53°.
0.03Deer Park, Monday, 26 October
Light rain. High 57°, low 52°.
0Deer Park, Tuesday, 27 October
Overcast. High 57°, low 50°.
0Deer Park, Wednesday, 28 October
Overcast. High 58°, low 53°.
0Deer Park, Thursday, 29 October
Overcast. High 65°, low 53°.
0.17Deer Park, Friday, 30 October
Rain. High 65°, low 49°.
0Deer Park, Saturday, 31 October
Clear. High 60°, low 44°.
0.42Deer Park, Sunday, 1 November
Rain. High 54°, low 50°.
0.52Deer Park, Monday, 2 November
Rain. High 53°, low 40°.
0.06
Deer Park, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.09Deer Park, Wednesday, 4 November
Climate normal for this date — 60-year average.
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.
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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