Weather in Stony Island, IL
Stony Island, Sunday, 9 August, 12:34
Partly cloudy. Feels like 96°. High 86°, low 63°.
Monthly outlook for Stony Island, IL: average high 80.1°, average low 66.3°. That is 0.1° above the climate normal for August. Precipitation is expected on 8 days (about 3.8 inches), against a normal of 6 days and 1.9 inches. The warmest day looks like 10 August (91.3°), the coolest 18 August (62.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 80.5° | 80° | +0.2° |
| 19 August – 28 August | 79.4° | 80.1° | -0.4° |
| 29 August – 7 September | at normal | 78.4° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Calumet Park (6 mi).
1.25
Stony Island, Monday, 10 August
Heavy rain. High 91°, low 73°.
1.46Stony Island, Tuesday, 11 August
Heavy rain. High 87°, low 67°.
0.08Stony Island, Wednesday, 12 August
Rain. High 82°, low 69°.
0.13Stony Island, Thursday, 13 August
Light rain. High 74°, low 66°.
0
Stony Island, Friday, 14 August
Overcast. High 74°, low 67°.
0.05Stony Island, Saturday, 15 August
Light rain. High 75°, low 66°.
0.25Stony Island, Sunday, 16 August
Rain. High 80°, low 65°.
0.01Stony Island, Monday, 17 August
Light rain. High 75°, low 67°.
0Stony Island, Tuesday, 18 August
Overcast. High 81°, low 62°.
0.04Stony Island, Wednesday, 19 August
Light rain. High 79°, low 69°.
0.03Stony Island, Thursday, 20 August
Light rain. High 74°, low 67°.
0.16Stony Island, Friday, 21 August
Rain. High 83°, low 63°.
0.02Stony Island, Saturday, 22 August
Light rain. High 83°, low 67°.
0
Stony Island, Sunday, 23 August
Clear. High 76°, low 65°.
0Stony Island, Monday, 24 August
Clear. High 81°, low 65°.
0.07Stony Island, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.17
Stony Island, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.14Stony Island, Thursday, 27 August
Climate normal for this date — 60-year average.
0.15Stony Island, Friday, 28 August
Climate normal for this date — 60-year average.
0.1Stony Island, Saturday, 29 August
Climate normal for this date — 60-year average.
0.09Stony Island, Sunday, 30 August
Climate normal for this date — 60-year average.
0.06Stony Island, Monday, 31 August
Climate normal for this date — 60-year average.
0.13Stony Island, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.06Stony Island, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.07Stony Island, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09Stony Island, Friday, 4 September
Climate normal for this date — 60-year average.
0.07Stony Island, Saturday, 5 September
Climate normal for this date — 60-year average.
0.1Stony Island, Sunday, 6 September
Climate normal for this date — 60-year average.
0.13Stony Island, 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 Stony Island, 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 Stony Island, 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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