Weather in Highland Hills, IL
Highland Hills, Sunday, 9 August, 13:24
Heavy rain. Feels like 89°. High 85°, low 63°.
Monthly outlook for Highland Hills, IL: average high 81°, average low 65.3°. That is 0.6° above the climate normal for August. Precipitation is expected on 9 days (about 3.1 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 10 August (90.8°), the coolest 18 August (62°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 81.8° | 79.9° | +1° |
| 19 August – 28 August | 79.7° | 79.9° | -0.1° |
| 29 August – 7 September | at normal | 78.1° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Glendale Heights (6 mi).
0.75Highland Hills, Monday, 10 August
Heavy rain. High 91°, low 71°.
0.86Highland Hills, Tuesday, 11 August
Heavy rain. High 87°, low 68°.
0.03Highland Hills, Wednesday, 12 August
Light rain. High 86°, low 67°.
0.12Highland Hills, Thursday, 13 August
Light rain. High 76°, low 65°.
0
Highland Hills, Friday, 14 August
Overcast. High 76°, low 63°.
0.04Highland Hills, Saturday, 15 August
Light rain. High 77°, low 67°.
0.24Highland Hills, Sunday, 16 August
Rain. High 79°, low 65°.
0Highland Hills, Monday, 17 August
Light rain. High 80°, low 66°.
0Highland Hills, Tuesday, 18 August
Overcast. High 80°, low 62°.
0.03Highland Hills, Wednesday, 19 August
Light rain. High 80°, low 68°.
0.15Highland Hills, Thursday, 20 August
Light rain. High 74°, low 65°.
0.26Highland Hills, Friday, 21 August
Rain. High 82°, low 62°.
0.04Highland Hills, Saturday, 22 August
Light rain. High 83°, low 66°.
0
Highland Hills, Sunday, 23 August
Clear. High 78°, low 62°.
0Highland Hills, Monday, 24 August
Clear. High 81°, low 64°.
0.07
Highland Hills, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.15Highland Hills, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.11Highland Hills, Thursday, 27 August
Climate normal for this date — 60-year average.
0.13
Highland Hills, Friday, 28 August
Climate normal for this date — 60-year average.
0.11Highland Hills, Saturday, 29 August
Climate normal for this date — 60-year average.
0.13Highland Hills, Sunday, 30 August
Climate normal for this date — 60-year average.
0.08
Highland Hills, Monday, 31 August
Climate normal for this date — 60-year average.
0.12Highland Hills, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.04Highland Hills, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.09Highland Hills, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09Highland Hills, Friday, 4 September
Climate normal for this date — 60-year average.
0.08Highland Hills, Saturday, 5 September
Climate normal for this date — 60-year average.
0.11Highland Hills, Sunday, 6 September
Climate normal for this date — 60-year average.
0.09Highland Hills, Monday, 7 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 Highland Hills, 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 Highland Hills, 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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