Weather in Half Day, IL
Half Day, Tuesday, 20 October, 04:03
Mostly clear. Feels like 46°. High 70°, low 45°.
Monthly outlook for Half Day, IL: average high 58.1°, average low 41.9°. That is 2.1° above the climate normal for October. Precipitation is expected on 1 day (about 0.4 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 21 October (72.3°), the coolest 28 October (29.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 20 October – 29 October | 61.9° | 55.5° | +3.6° |
| 30 October – 8 November | 51.7° | 51.7° | +0° |
| 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 (6 mi).
0
Half Day, Wednesday, 21 October
Clear. High 72°, low 44°.
0
Half Day, Thursday, 22 October
Mostly clear. High 68°, low 49°.
0Half Day, Friday, 23 October
Clear. High 64°, low 50°.
0Half Day, Saturday, 24 October
Clear. High 65°, low 47°.
0
Half Day, Sunday, 25 October
Overcast. High 70°, low 53°.
0.37
Half Day, Monday, 26 October
Rain. High 68°, low 46°.
0Half Day, Tuesday, 27 October
Light rain. High 50°, low 37°.
0Half Day, Wednesday, 28 October
Clear. High 41°, low 29°.
0Half Day, Thursday, 29 October
Clear. High 51°, low 33°.
0Half Day, Friday, 30 October
Overcast. High 53°, low 42°.
0Half Day, Saturday, 31 October
Clear. High 52°, low 40°.
0
Half Day, Sunday, 1 November
Partly cloudy. High 49°, low 37°.
0Half Day, Monday, 2 November
Partly cloudy. High 50°, low 38°.
0Half Day, Tuesday, 3 November
Clear. High 53°, low 39°.
0Half Day, Wednesday, 4 November
Overcast. High 54°, low 42°.
0.12Half Day, Thursday, 5 November
Climate normal for this date — 60-year average.
0.09Half Day, Friday, 6 November
Climate normal for this date — 60-year average.
0.05Half Day, Saturday, 7 November
Climate normal for this date — 60-year average.
0.06Half Day, Sunday, 8 November
Climate normal for this date — 60-year average.
0.12
Half Day, Monday, 9 November
Climate normal for this date — 60-year average.
0.11Half Day, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.08Half Day, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.06Half Day, Thursday, 12 November
Climate normal for this date — 60-year average.
0.05Half Day, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Half Day, Saturday, 14 November
Climate normal for this date — 60-year average.
0.09Half Day, Sunday, 15 November
Climate normal for this date — 60-year average.
0.05Half Day, Monday, 16 November
Climate normal for this date — 60-year average.
0.09Half Day, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.11Half Day, 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 Half Day, 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 Half Day, 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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