Weather in Half Day, IL
Half Day, Saturday, 17 October, 17:28
Clear. Feels like 53°. High 56°, low 36°.
Monthly outlook for Half Day, IL: average high 63.7°, average low 49.6°. That is 4.6° above the climate normal for October. Precipitation is expected on 4 days (about 2.7 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 25 October (72.7°), the coolest 17 October (35.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 17 October – 26 October | 65.3° | 56.6° | +4.9° |
| 27 October – 5 November | 61.1° | 52.8° | +4.6° |
| 6 November – 15 November | at normal | 47.7° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Highwood (6 mi).
0Half Day, Sunday, 18 October
Clear. High 63°, low 43°.
0
Half Day, Monday, 19 October
Partly cloudy. High 63°, low 43°.
0Half Day, Tuesday, 20 October
Partly cloudy. High 64°, low 44°.
0Half Day, Wednesday, 21 October
Clear. High 66°, low 46°.
0Half Day, Thursday, 22 October
Clear. High 64°, low 48°.
0
Half Day, Friday, 23 October
Overcast. High 70°, low 52°.
0Half Day, Saturday, 24 October
Overcast. High 70°, low 60°.
0Half Day, Sunday, 25 October
Overcast. High 73°, low 62°.
0.48
Half Day, Monday, 26 October
Rain. High 65°, low 54°.
0Half Day, Tuesday, 27 October
Overcast. High 52°, low 48°.
0Half Day, Wednesday, 28 October
Overcast. High 56°, low 46°.
0.4Half Day, Thursday, 29 October
Rain. High 57°, low 47°.
0.17Half Day, Friday, 30 October
Light rain. High 66°, low 58°.
1.65Half Day, Saturday, 31 October
Heavy rain. High 67°, low 55°.
0Half Day, Sunday, 1 November
Partly cloudy. High 68°, low 52°.
0.13
Half 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.
0.05
Half 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.
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.
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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