Weather in Deer Park, IL
Deer Park, Thursday, 22 October, 10:50
Clear. Feels like 66°. High 71°, low 45°.
Monthly outlook for Deer Park, IL: average high 59.7°, average low 45.3°. That is 3.4° above the climate normal for October. Precipitation is expected on 3 days (about 1.2 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 22 October (71.3°), the coolest 30 October (36.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 22 October – 31 October | 62.9° | 54.8° | +4.5° |
| 1 November – 10 November | 54.3° | 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).
0
Deer Park, Friday, 23 October
Overcast. High 71°, low 46°.
0Deer Park, Saturday, 24 October
Overcast. High 64°, low 47°.
0
Deer Park, Sunday, 25 October
Partly cloudy. High 69°, low 52°.
0Deer Park, Monday, 26 October
Overcast. High 65°, low 50°.
0Deer Park, Tuesday, 27 October
Overcast. High 63°, low 51°.
0Deer Park, Wednesday, 28 October
Overcast. High 65°, low 51°.
0.01
Deer Park, Thursday, 29 October
Light rain. High 55°, low 42°.
0Deer Park, Friday, 30 October
Clear. High 53°, low 36°.
0.39Deer Park, Saturday, 31 October
Light rain. High 53°, low 44°.
0.23Deer Park, Sunday, 1 November
Light rain. High 58°, low 54°.
0Deer Park, Monday, 2 November
Partly cloudy. High 60°, low 47°.
0Deer Park, Tuesday, 3 November
Clear. High 61°, low 43°.
0Deer Park, Wednesday, 4 November
Overcast. High 49°, low 40°.
0Deer Park, Thursday, 5 November
Clear. High 53°, low 38°.
0.53Deer Park, Friday, 6 November
Rain. High 44°, low 41°.
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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