Weather in South Wilmington, IL
South Wilmington, Sunday, 9 August, 10:47
Overcast. Feels like 90°. High 89°, low 64°.
Monthly outlook for South Wilmington, IL: average high 80.3°, average low 63.7°. That is 0.4° below the climate normal for August. Precipitation is expected on 10 days (about 3.5 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 10 August (93.4°), the coolest 23 August (57.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 81.4° | 81° | +0.2° |
| 19 August – 28 August | 78.4° | 81.4° | -1.7° |
| 29 August – 7 September | at normal | 80° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Cabery (13 mi).
0.1
South Wilmington, Monday, 10 August
Rain. High 93°, low 73°.
0.16South Wilmington, Tuesday, 11 August
Rain. High 90°, low 67°.
0.08South Wilmington, Wednesday, 12 August
Rain. High 85°, low 68°.
0.72South Wilmington, Thursday, 13 August
Rain. High 77°, low 64°.
0.17South Wilmington, Friday, 14 August
Rain. High 73°, low 64°.
0.15South Wilmington, Saturday, 15 August
Light rain. High 75°, low 62°.
0.08South Wilmington, Sunday, 16 August
Light rain. High 78°, low 66°.
0South Wilmington, Monday, 17 August
Overcast. High 75°, low 63°.
0South Wilmington, Tuesday, 18 August
Overcast. High 79°, low 58°.
0.02South Wilmington, Wednesday, 19 August
Light rain. High 78°, low 68°.
0.1South Wilmington, Thursday, 20 August
Light rain. High 76°, low 60°.
1.52South Wilmington, Friday, 21 August
Heavy rain. High 82°, low 61°.
0.39South Wilmington, Saturday, 22 August
Rain. High 81°, low 65°.
0
South Wilmington, Sunday, 23 August
Partly cloudy. High 75°, low 58°.
0
South Wilmington, Monday, 24 August
Clear. High 79°, low 59°.
0.13South Wilmington, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.15South Wilmington, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.11South Wilmington, Thursday, 27 August
Climate normal for this date — 60-year average.
0.15South Wilmington, Friday, 28 August
Climate normal for this date — 60-year average.
0.12
South Wilmington, Saturday, 29 August
Climate normal for this date — 60-year average.
0.06South Wilmington, Sunday, 30 August
Climate normal for this date — 60-year average.
0.09South Wilmington, Monday, 31 August
Climate normal for this date — 60-year average.
0.11South Wilmington, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.07South Wilmington, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.07South Wilmington, Thursday, 3 September
Climate normal for this date — 60-year average.
0.07South Wilmington, Friday, 4 September
Climate normal for this date — 60-year average.
0.06South Wilmington, Saturday, 5 September
Climate normal for this date — 60-year average.
0.11South Wilmington, Sunday, 6 September
Climate normal for this date — 60-year average.
0.09South Wilmington, 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 South Wilmington, 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 South Wilmington, 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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