Weather in Calumet City, IL
Calumet City, Sunday, 9 August, 05:26
Clear. Feels like 64°. High 84°, low 63°.
Monthly outlook for Calumet City, IL: average high 83.6°, average low 68.5°. That is 2° above the climate normal for August. Precipitation is expected on 5 days (about 2.1 inches), against a normal of 6 days and 1.9 inches. The warmest day looks like 22 August (96.4°), the coolest 14 August (62.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 80.5° | 80° | +0.3° |
| 19 August – 28 August | 88.8° | 80.1° | +4.8° |
| 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 (7 mi).
0.78
Calumet City, Monday, 10 August
Rain. High 90°, low 71°.
0.38Calumet City, Tuesday, 11 August
Rain. High 82°, low 69°.
0.01Calumet City, Wednesday, 12 August
Light rain. High 82°, low 71°.
0
Calumet City, Thursday, 13 August
Overcast. High 74°, low 67°.
0Calumet City, Friday, 14 August
Overcast. High 74°, low 62°.
0.02Calumet City, Saturday, 15 August
Light rain. High 79°, low 64°.
0.02Calumet City, Sunday, 16 August
Light rain. High 79°, low 65°.
0.01Calumet City, Monday, 17 August
Light rain. High 82°, low 67°.
0
Calumet City, Tuesday, 18 August
Partly cloudy. High 80°, low 67°.
0.13Calumet City, Wednesday, 19 August
Light rain. High 89°, low 68°.
0Calumet City, Thursday, 20 August
Overcast. High 90°, low 76°.
0
Calumet City, Friday, 21 August
Clear. High 84°, low 73°.
0Calumet City, Saturday, 22 August
Clear. High 96°, low 71°.
0.01Calumet City, Sunday, 23 August
Light rain. High 92°, low 71°.
0.52Calumet City, Monday, 24 August
Rain. High 81°, low 70°.
0.07Calumet City, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.17
Calumet City, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.14Calumet City, Thursday, 27 August
Climate normal for this date — 60-year average.
0.15Calumet City, Friday, 28 August
Climate normal for this date — 60-year average.
0.1Calumet City, Saturday, 29 August
Climate normal for this date — 60-year average.
0.09Calumet City, Sunday, 30 August
Climate normal for this date — 60-year average.
0.06Calumet City, Monday, 31 August
Climate normal for this date — 60-year average.
0.13Calumet City, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.06Calumet City, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.07Calumet City, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09Calumet City, Friday, 4 September
Climate normal for this date — 60-year average.
0.07Calumet City, Saturday, 5 September
Climate normal for this date — 60-year average.
0.1Calumet City, Sunday, 6 September
Climate normal for this date — 60-year average.
0.13Calumet City, 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 Calumet City, 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 Calumet City, 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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