Weather in West Chicago, IL
West Chicago, Sunday, 9 August, 01:57
Clear. Feels like 64°. High 83°, low 63°.
Monthly outlook for West Chicago, IL: average high 81.8°, average low 66.3°. That is 1.1° above the climate normal for August. Precipitation is expected on 4 days (about 1.6 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 23 August (90.8°), the coolest 14 August (58.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 79.4° | 79.9° | -0.3° |
| 19 August – 28 August | 85.9° | 79.9° | +3.3° |
| 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 (8 mi).
0.57
West Chicago, Monday, 10 August
Rain. High 89°, low 70°.
0.07West Chicago, Tuesday, 11 August
Light rain. High 81°, low 68°.
0.02West Chicago, Wednesday, 12 August
Light rain. High 83°, low 68°.
0
West Chicago, Thursday, 13 August
Overcast. High 76°, low 64°.
0West Chicago, Friday, 14 August
Overcast. High 75°, low 58°.
0.01West Chicago, Saturday, 15 August
Light rain. High 76°, low 62°.
0.01West Chicago, Sunday, 16 August
Light rain. High 74°, low 63°.
0.02West Chicago, Monday, 17 August
Light rain. High 80°, low 64°.
0West Chicago, Tuesday, 18 August
Overcast. High 77°, low 64°.
0.11West Chicago, Wednesday, 19 August
Light rain. High 84°, low 66°.
0West Chicago, Thursday, 20 August
Overcast. High 83°, low 74°.
0
West Chicago, Friday, 21 August
Clear. High 85°, low 72°.
0West Chicago, Saturday, 22 August
Clear. High 90°, low 68°.
0.03West Chicago, Sunday, 23 August
Light rain. High 91°, low 69°.
0.03West Chicago, Monday, 24 August
Light rain. High 82°, low 67°.
0.07
West Chicago, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.15West Chicago, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.11West Chicago, Thursday, 27 August
Climate normal for this date — 60-year average.
0.13
West Chicago, Friday, 28 August
Climate normal for this date — 60-year average.
0.11West Chicago, Saturday, 29 August
Climate normal for this date — 60-year average.
0.13West Chicago, Sunday, 30 August
Climate normal for this date — 60-year average.
0.08
West Chicago, Monday, 31 August
Climate normal for this date — 60-year average.
0.12West Chicago, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.04West Chicago, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.09West Chicago, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09West Chicago, Friday, 4 September
Climate normal for this date — 60-year average.
0.08West Chicago, Saturday, 5 September
Climate normal for this date — 60-year average.
0.11West Chicago, Sunday, 6 September
Climate normal for this date — 60-year average.
0.09West Chicago, 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 West Chicago, 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 West Chicago, 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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