Weather in Half Day, IL
Half Day, Sunday, 11 October, 05:10
Mostly clear. Feels like 56°. High 78°, low 56°.
Monthly outlook for Half Day, IL: average high 62.5°, average low 48.5°. That is 2.6° above the climate normal for October. Precipitation is expected on 5 days (about 1.3 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 12 October (84.9°), the coolest 18 October (29.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 11 October – 20 October | 63.4° | 58.9° | +2.5° |
| 21 October – 30 October | 61.2° | 55.2° | +3.3° |
| 31 October – 9 November | at normal | 51.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Highwood (6 mi).
0
Half Day, Monday, 12 October
Partly cloudy. High 85°, low 66°.
0.15
Half Day, Tuesday, 13 October
Rain. High 77°, low 64°.
0.42Half Day, Wednesday, 14 October
Heavy rain. High 66°, low 58°.
0.37Half Day, Thursday, 15 October
Rain. High 58°, low 55°.
0.07Half Day, Friday, 16 October
Light rain. High 58°, low 43°.
0.01
Half Day, Saturday, 17 October
Light snow. High 44°, low 33°.
0
Half Day, Sunday, 18 October
Clear. High 47°, low 29°.
0Half Day, Monday, 19 October
Partly cloudy. High 57°, low 41°.
0Half Day, Tuesday, 20 October
Clear. High 63°, low 45°.
0Half Day, Wednesday, 21 October
Clear. High 68°, low 53°.
0Half Day, Thursday, 22 October
Light rain. High 68°, low 54°.
0Half Day, Friday, 23 October
Partly cloudy. High 64°, low 51°.
0.28Half Day, Saturday, 24 October
Rain. High 61°, low 46°.
0
Half Day, Sunday, 25 October
Overcast. High 52°, low 39°.
0.01Half Day, Monday, 26 October
Light rain. High 55°, low 42°.
0.09Half Day, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.05
Half Day, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.06Half Day, Thursday, 29 October
Climate normal for this date — 60-year average.
0.1Half Day, Friday, 30 October
Climate normal for this date — 60-year average.
0.13
Half Day, Saturday, 31 October
Climate normal for this date — 60-year average.
0.17Half Day, Sunday, 1 November
Climate normal for this date — 60-year average.
0.13Half Day, Monday, 2 November
Climate normal for this date — 60-year average.
0.06Half Day, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.09Half Day, Wednesday, 4 November
Climate normal for this date — 60-year average.
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.
0.12Half Day, Monday, 9 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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