Weather in East Alton, IL
East Alton, Sunday, 9 August, 08:19
Mostly clear. Feels like 78°. High 98°, low 74°.
Monthly outlook for East Alton, IL: average high 91.7°, average low 69.9°. That is 3.5° above the climate normal for August. Precipitation is expected on 2 days (about 0.3 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 10 August (103.8°), the coolest 24 August (61.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 94° | 85.4° | +4.8° |
| 19 August – 28 August | 87.9° | 85.6° | +1.3° |
| 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 (9 mi).
0
East Alton, Monday, 10 August
Light rain. High 104°, low 75°.
0.01East Alton, Tuesday, 11 August
Light rain. High 100°, low 77°.
0.03East Alton, Wednesday, 12 August
Light rain. High 95°, low 77°.
0.19East Alton, Thursday, 13 August
Rain. High 92°, low 72°.
0
East Alton, Friday, 14 August
Overcast. High 87°, low 71°.
0
East Alton, Saturday, 15 August
Partly cloudy. High 94°, low 70°.
0East Alton, Sunday, 16 August
Partly cloudy. High 90°, low 75°.
0East Alton, Monday, 17 August
Overcast. High 82°, low 64°.
0.11East Alton, Tuesday, 18 August
Light rain. High 99°, low 67°.
0East Alton, Wednesday, 19 August
Mostly clear. High 91°, low 70°.
0
East Alton, Thursday, 20 August
Clear. High 82°, low 63°.
0East Alton, Friday, 21 August
Mostly clear. High 96°, low 66°.
0East Alton, Saturday, 22 August
Clear. High 93°, low 74°.
0East Alton, Sunday, 23 August
Clear. High 82°, low 62°.
0East Alton, Monday, 24 August
Clear. High 83°, low 61°.
0.06East Alton, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.11East Alton, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.14East Alton, Thursday, 27 August
Climate normal for this date — 60-year average.
0.09East Alton, Friday, 28 August
Climate normal for this date — 60-year average.
0.07East Alton, Saturday, 29 August
Climate normal for this date — 60-year average.
0.12East Alton, Sunday, 30 August
Climate normal for this date — 60-year average.
0.11East Alton, Monday, 31 August
Climate normal for this date — 60-year average.
0.12East Alton, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.1
East Alton, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.09East Alton, Thursday, 3 September
Climate normal for this date — 60-year average.
0.12East Alton, Friday, 4 September
Climate normal for this date — 60-year average.
0.04East Alton, Saturday, 5 September
Climate normal for this date — 60-year average.
0.05East Alton, Sunday, 6 September
Climate normal for this date — 60-year average.
0.08East Alton, 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 East Alton, 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 East Alton, 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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