Weather in Half Day, IL
Half Day, Monday, 12 October, 06:29
Overcast. Feels like 65°. High 84°, low 61°.
Monthly outlook for Half Day, IL: average high 65.4°, average low 52.8°. That is 4.5° above the climate normal for October. Precipitation is expected on 5 days (about 2.2 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 12 October (84.2°), the coolest 17 October (40.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 12 October – 21 October | 66.9° | 58.5° | +4.7° |
| 22 October – 31 October | 62.9° | 54.8° | +4.5° |
| 1 November – 10 November | at normal | 50.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Highwood (6 mi).
0.06
Half Day, Tuesday, 13 October
Rain. High 81°, low 64°.
0.28Half Day, Wednesday, 14 October
Heavy rain. High 68°, low 58°.
1Half Day, Thursday, 15 October
Rain. High 58°, low 55°.
0
Half Day, Friday, 16 October
Partly cloudy. High 56°, low 46°.
0
Half Day, Saturday, 17 October
Clear. High 58°, low 41°.
0Half Day, Sunday, 18 October
Clear. High 59°, low 44°.
0Half Day, Monday, 19 October
Overcast. High 66°, low 49°.
0Half Day, Tuesday, 20 October
Overcast. High 69°, low 58°.
0Half Day, Wednesday, 21 October
Clear. High 70°, low 58°.
0Half Day, Thursday, 22 October
Partly cloudy. High 73°, low 59°.
0.2Half Day, Friday, 23 October
Rain. High 67°, low 53°.
0Half Day, Saturday, 24 October
Clear. High 58°, low 50°.
0.66Half Day, Sunday, 25 October
Rain. High 59°, low 52°.
0.01Half Day, Monday, 26 October
Light rain. High 57°, low 51°.
0Half Day, Tuesday, 27 October
Clear. High 62°, low 46°.
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.
0.11Half Day, Tuesday, 10 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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