Weather in South Roxana, IL
South Roxana, Sunday, 9 August, 02:02
Partly cloudy. Feels like 76°. High 98°, low 72°.
Monthly outlook for South Roxana, IL: average high 95°, average low 73.4°. That is 5.4° above the climate normal for August. Precipitation is expected on 6 days (about 0.9 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 20 August (113°), the coolest 15 August (65.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 89.5° | 85.4° | +2.3° |
| 19 August – 28 August | 104.2° | 85.6° | +10.3° |
| 29 August – 7 September | at normal | 83.3° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Edwardsville (4 mi).
0.16
South Roxana, Monday, 10 August
Rain. High 100°, low 70°.
0.06South Roxana, Tuesday, 11 August
Rain. High 100°, low 71°.
0.1South Roxana, Wednesday, 12 August
Light rain. High 93°, low 75°.
0.31South Roxana, Thursday, 13 August
Rain. High 84°, low 71°.
0.16South Roxana, Friday, 14 August
Light rain. High 72°, low 66°.
0.09South Roxana, Saturday, 15 August
Light rain. High 85°, low 66°.
0
South Roxana, Sunday, 16 August
Overcast. High 88°, low 70°.
0
South Roxana, Monday, 17 August
Partly cloudy. High 85°, low 71°.
0.01South Roxana, Tuesday, 18 August
Light rain. High 90°, low 68°.
0South Roxana, Wednesday, 19 August
Light rain. High 104°, low 76°.
0
South Roxana, Thursday, 20 August
Mostly clear. High 113°, low 81°.
0
South Roxana, Friday, 21 August
Clear. High 98°, low 81°.
0South Roxana, Saturday, 22 August
Clear. High 106°, low 79°.
0South Roxana, Sunday, 23 August
Light rain. High 108°, low 80°.
0.02South Roxana, Monday, 24 August
Light rain. High 96°, low 76°.
0.06South Roxana, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.11South Roxana, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.14South Roxana, Thursday, 27 August
Climate normal for this date — 60-year average.
0.09South Roxana, Friday, 28 August
Climate normal for this date — 60-year average.
0.07South Roxana, Saturday, 29 August
Climate normal for this date — 60-year average.
0.12South Roxana, Sunday, 30 August
Climate normal for this date — 60-year average.
0.11South Roxana, Monday, 31 August
Climate normal for this date — 60-year average.
0.12South Roxana, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.1
South Roxana, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.09South Roxana, Thursday, 3 September
Climate normal for this date — 60-year average.
0.12South Roxana, Friday, 4 September
Climate normal for this date — 60-year average.
0.04South Roxana, Saturday, 5 September
Climate normal for this date — 60-year average.
0.05South Roxana, Sunday, 6 September
Climate normal for this date — 60-year average.
0.08South Roxana, 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 Roxana, 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 Roxana, 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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