Weather in Half Day, IL
Half Day, Saturday, 8 August, 17:43
Clear. Feels like 82°. High 82°, low 68°.
Monthly outlook for Half Day, IL: average high 78.5°, average low 65.3°. That is 0.3° above the climate normal for August. Precipitation is expected on 6 days (about 2.5 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 12 August (84.7°), the coolest 23 August (57.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 80° | 78.1° | +1° |
| 18 August – 27 August | 75.9° | 77.8° | -1.1° |
| 28 August – 6 September | at normal | 76.4° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Highwood (6 mi).
1.07
Half Day, Sunday, 9 August
Heavy rain. High 84°, low 65°.
0.24Half Day, Monday, 10 August
Heavy rain. High 83°, low 72°.
0.53Half Day, Tuesday, 11 August
Heavy rain. High 83°, low 71°.
0Half Day, Wednesday, 12 August
Light rain. High 85°, low 67°.
0.08Half Day, Thursday, 13 August
Light rain. High 71°, low 63°.
0Half Day, Friday, 14 August
Clear. High 73°, low 61°.
0
Half Day, Saturday, 15 August
Overcast. High 77°, low 59°.
0
Half Day, Sunday, 16 August
Partly cloudy. High 80°, low 63°.
0.03Half Day, Monday, 17 August
Light rain. High 82°, low 69°.
0Half Day, Tuesday, 18 August
Light rain. High 80°, low 70°.
0.37Half Day, Wednesday, 19 August
Rain. High 84°, low 68°.
0.02Half Day, Thursday, 20 August
Light rain. High 76°, low 67°.
0Half Day, Friday, 21 August
Partly cloudy. High 77°, low 64°.
0.07Half Day, Saturday, 22 August
Light rain. High 73°, low 60°.
0Half Day, Sunday, 23 August
Clear. High 65°, low 57°.
0.11Half Day, Monday, 24 August
Climate normal for this date — 60-year average.
0.07Half Day, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.14
Half Day, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.1Half Day, Thursday, 27 August
Climate normal for this date — 60-year average.
0.12Half Day, Friday, 28 August
Climate normal for this date — 60-year average.
0.13Half Day, Saturday, 29 August
Climate normal for this date — 60-year average.
0.09Half Day, Sunday, 30 August
Climate normal for this date — 60-year average.
0.06Half Day, Monday, 31 August
Climate normal for this date — 60-year average.
0.1Half Day, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.04Half Day, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.09Half Day, Thursday, 3 September
Climate normal for this date — 60-year average.
0.08Half Day, Friday, 4 September
Climate normal for this date — 60-year average.
0.08Half Day, Saturday, 5 September
Climate normal for this date — 60-year average.
0.09Half Day, Sunday, 6 September
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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