Weather in Harwood Heights, IL
Harwood Heights, Sunday, 9 August, 11:22
Mostly clear. Feels like 89°. High 86°, low 63°.
Monthly outlook for Harwood Heights, IL: average high 82.2°, average low 65.9°. That is 1.5° above the climate normal for August. Precipitation is expected on 7 days (about 3.5 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 10 August (90.4°), the coolest 23 August (62.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 82.4° | 79.6° | +1.5° |
| 19 August – 28 August | 81.8° | 79.6° | +1.2° |
| 29 August – 7 September | at normal | 77.9° | — |
August records over 66 years
1.31
Harwood Heights, Monday, 10 August
Heavy rain. High 90°, low 73°.
1.07Harwood Heights, Tuesday, 11 August
Heavy rain. High 89°, low 66°.
0.01Harwood Heights, Wednesday, 12 August
Light rain. High 87°, low 66°.
0.09Harwood Heights, Thursday, 13 August
Light rain. High 76°, low 66°.
0
Harwood Heights, Friday, 14 August
Overcast. High 76°, low 65°.
0.06Harwood Heights, Saturday, 15 August
Light rain. High 78°, low 67°.
0.25Harwood Heights, Sunday, 16 August
Rain. High 80°, low 65°.
0Harwood Heights, Monday, 17 August
Light rain. High 78°, low 67°.
0Harwood Heights, Tuesday, 18 August
Light rain. High 83°, low 63°.
0.04Harwood Heights, Wednesday, 19 August
Light rain. High 81°, low 68°.
0.03Harwood Heights, Thursday, 20 August
Light rain. High 76°, low 67°.
0.12Harwood Heights, Friday, 21 August
Light rain. High 84°, low 64°.
0.03Harwood Heights, Saturday, 22 August
Light rain. High 86°, low 67°.
0
Harwood Heights, Sunday, 23 August
Clear. High 80°, low 63°.
0Harwood Heights, Monday, 24 August
Clear. High 84°, low 65°.
0.07
Harwood Heights, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.14
Harwood Heights, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.11Harwood Heights, Thursday, 27 August
Climate normal for this date — 60-year average.
0.13Harwood Heights, Friday, 28 August
Climate normal for this date — 60-year average.
0.11Harwood Heights, Saturday, 29 August
Climate normal for this date — 60-year average.
0.13Harwood Heights, Sunday, 30 August
Climate normal for this date — 60-year average.
0.07Harwood Heights, Monday, 31 August
Climate normal for this date — 60-year average.
0.12Harwood Heights, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.05Harwood Heights, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.09Harwood Heights, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09Harwood Heights, Friday, 4 September
Climate normal for this date — 60-year average.
0.09Harwood Heights, Saturday, 5 September
Climate normal for this date — 60-year average.
0.1Harwood Heights, Sunday, 6 September
Climate normal for this date — 60-year average.
0.07Harwood Heights, 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 Harwood Heights, 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 Harwood Heights, 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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