Weather in Bethalto, IL
Bethalto, Monday, 19 October, 20:55
Overcast. Feels like 54°. High 71°, low 40°.
Monthly outlook for Bethalto, IL: average high 65.7°, average low 45.7°. That is 1.8° above the climate normal for October. Precipitation is expected on 3 days (about 0.5 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 25 October (75.4°), the coolest 28 October (29.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 19 October – 28 October | 67.9° | 63.4° | +2.5° |
| 29 October – 7 November | 62.1° | 59.4° | +1.5° |
| 8 November – 17 November | at normal | 54.5° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Edwardsville (8 mi).
0
Bethalto, Tuesday, 20 October
Clear. High 73°, low 44°.
0
Bethalto, Wednesday, 21 October
Partly cloudy. High 71°, low 44°.
0Bethalto, Thursday, 22 October
Clear. High 73°, low 49°.
0Bethalto, Friday, 23 October
Clear. High 70°, low 52°.
0Bethalto, Saturday, 24 October
Partly cloudy. High 70°, low 49°.
0Bethalto, Sunday, 25 October
Overcast. High 75°, low 52°.
0Bethalto, Monday, 26 October
Overcast. High 72°, low 58°.
0.08
Bethalto, Tuesday, 27 October
Light rain. High 58°, low 40°.
0Bethalto, Wednesday, 28 October
Clear. High 45°, low 29°.
0Bethalto, Thursday, 29 October
Clear. High 54°, low 30°.
0Bethalto, Friday, 30 October
Clear. High 61°, low 38°.
0Bethalto, Saturday, 31 October
Overcast. High 68°, low 51°.
0.07Bethalto, Sunday, 1 November
Light rain. High 65°, low 53°.
0.37Bethalto, Monday, 2 November
Rain. High 58°, low 55°.
0Bethalto, Tuesday, 3 November
Clear. High 67°, low 47°.
0.16Bethalto, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.16Bethalto, Thursday, 5 November
Climate normal for this date — 60-year average.
0.09
Bethalto, Friday, 6 November
Climate normal for this date — 60-year average.
0.08Bethalto, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04
Bethalto, Sunday, 8 November
Climate normal for this date — 60-year average.
0.1Bethalto, Monday, 9 November
Climate normal for this date — 60-year average.
0.13Bethalto, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.11Bethalto, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.09Bethalto, Thursday, 12 November
Climate normal for this date — 60-year average.
0.06Bethalto, Friday, 13 November
Climate normal for this date — 60-year average.
0.1Bethalto, Saturday, 14 November
Climate normal for this date — 60-year average.
0.13Bethalto, Sunday, 15 November
Climate normal for this date — 60-year average.
0.11Bethalto, Monday, 16 November
Climate normal for this date — 60-year average.
0.12Bethalto, Tuesday, 17 November
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 Bethalto, 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 Bethalto, 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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