Weather in Des Plaines, IL
Des Plaines, Saturday, 8 August, 15:41
Clear. Feels like 86°. High 84°, low 69°.
Monthly outlook for Des Plaines, IL: average high 80.3°, average low 66.4°. That is 0.3° above the climate normal for August. Precipitation is expected on 5 days (about 2.2 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 12 August (86.6°), the coolest 23 August (58.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 81.9° | 79.9° | +1.1° |
| 18 August – 27 August | 77.5° | 79.7° | -1.2° |
| 28 August – 6 September | at normal | 78.2° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Park Ridge (3 mi).
1.2
Des Plaines, Sunday, 9 August
Heavy rain. High 84°, low 66°.
0.13Des Plaines, Monday, 10 August
Rain. High 86°, low 73°.
0.3Des Plaines, Tuesday, 11 August
Rain. High 84°, low 72°.
0.02Des Plaines, Wednesday, 12 August
Light rain. High 87°, low 68°.
0.07Des Plaines, Thursday, 13 August
Light rain. High 74°, low 65°.
0Des Plaines, Friday, 14 August
Clear. High 75°, low 63°.
0
Des Plaines, Saturday, 15 August
Overcast. High 80°, low 61°.
0Des Plaines, Sunday, 16 August
Overcast. High 82°, low 63°.
0.03Des Plaines, Monday, 17 August
Light rain. High 84°, low 69°.
0.01Des Plaines, Tuesday, 18 August
Light rain. High 82°, low 71°.
0.41Des Plaines, Wednesday, 19 August
Rain. High 86°, low 69°.
0.01Des Plaines, Thursday, 20 August
Light rain. High 77°, low 69°.
0
Des Plaines, Friday, 21 August
Partly cloudy. High 79°, low 66°.
0.03Des Plaines, Saturday, 22 August
Light rain. High 75°, low 61°.
0Des Plaines, Sunday, 23 August
Clear. High 66°, low 58°.
0.12Des Plaines, Monday, 24 August
Climate normal for this date — 60-year average.
0.06Des Plaines, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.15
Des Plaines, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.11Des Plaines, Thursday, 27 August
Climate normal for this date — 60-year average.
0.13Des Plaines, Friday, 28 August
Climate normal for this date — 60-year average.
0.11Des Plaines, Saturday, 29 August
Climate normal for this date — 60-year average.
0.13Des Plaines, Sunday, 30 August
Climate normal for this date — 60-year average.
0.07Des Plaines, Monday, 31 August
Climate normal for this date — 60-year average.
0.12Des Plaines, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.05Des Plaines, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.08Des Plaines, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09Des Plaines, Friday, 4 September
Climate normal for this date — 60-year average.
0.08Des Plaines, Saturday, 5 September
Climate normal for this date — 60-year average.
0.1Des Plaines, Sunday, 6 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 Des Plaines, 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 Des Plaines, 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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