Weather in Downers Grove, IL
Downers Grove, Sunday, 9 August, 05:19
Clear. Feels like 64°. High 84°, low 63°.
Monthly outlook for Downers Grove, IL: average high 83.5°, average low 68.4°. That is 1.9° above the climate normal for August. Precipitation is expected on 6 days (about 1.5 inches), against a normal of 6 days and 1.9 inches. The warmest day looks like 23 August (92.4°), the coolest 14 August (62.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 80.7° | 80.2° | +0.3° |
| 19 August – 28 August | 88.1° | 80.2° | +4.4° |
| 29 August – 7 September | at normal | 78.4° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — La Grange (7 mi).
0.62
Downers Grove, Monday, 10 August
Rain. High 90°, low 71°.
0.07Downers Grove, Tuesday, 11 August
Light rain. High 81°, low 69°.
0.04Downers Grove, Wednesday, 12 August
Light rain. High 85°, low 71°.
0
Downers Grove, Thursday, 13 August
Overcast. High 77°, low 67°.
0Downers Grove, Friday, 14 August
Overcast. High 76°, low 62°.
0Downers Grove, Saturday, 15 August
Light rain. High 78°, low 64°.
0.01Downers Grove, Sunday, 16 August
Light rain. High 77°, low 65°.
0.02Downers Grove, Monday, 17 August
Light rain. High 82°, low 66°.
0Downers Grove, Tuesday, 18 August
Overcast. High 78°, low 67°.
0.09Downers Grove, Wednesday, 19 August
Light rain. High 85°, low 68°.
0Downers Grove, Thursday, 20 August
Overcast. High 85°, low 74°.
0
Downers Grove, Friday, 21 August
Clear. High 87°, low 74°.
0Downers Grove, Saturday, 22 August
Clear. High 92°, low 70°.
0.02Downers Grove, Sunday, 23 August
Light rain. High 92°, low 73°.
0.08Downers Grove, Monday, 24 August
Light rain. High 87°, low 70°.
0.07
Downers Grove, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.16
Downers Grove, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.14Downers Grove, Thursday, 27 August
Climate normal for this date — 60-year average.
0.13Downers Grove, Friday, 28 August
Climate normal for this date — 60-year average.
0.11Downers Grove, Saturday, 29 August
Climate normal for this date — 60-year average.
0.09Downers Grove, Sunday, 30 August
Climate normal for this date — 60-year average.
0.07Downers Grove, Monday, 31 August
Climate normal for this date — 60-year average.
0.13Downers Grove, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.06Downers Grove, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.08Downers Grove, Thursday, 3 September
Climate normal for this date — 60-year average.
0.08Downers Grove, Friday, 4 September
Climate normal for this date — 60-year average.
0.07Downers Grove, Saturday, 5 September
Climate normal for this date — 60-year average.
0.1Downers Grove, Sunday, 6 September
Climate normal for this date — 60-year average.
0.1Downers Grove, 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 Downers Grove, 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 Downers Grove, 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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