Weather in Glen Carbon, IL
Glen Carbon, Friday, 13 November, 06:12
Overcast. Feels like 29°. High 45°, low 35°.
Monthly outlook for Glen Carbon, IL: average high 52.2°, average low 36.4°. That is 0.4° above the climate normal for November. Precipitation is expected on 2 days (about 1.0 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 21 November (70.5°), the coolest 25 November (21.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 13 November – 22 November | 57.2° | 52.9° | +2.4° |
| 23 November – 2 December | 43.9° | 48.3° | -2.5° |
| 3 December – 12 December | at normal | 43.8° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Edwardsville (2 mi).
0
Glen Carbon, Saturday, 14 November
Clear. High 47°, low 34°.
0Glen Carbon, Sunday, 15 November
Overcast. High 50°, low 31°.
0Glen Carbon, Monday, 16 November
Clear. High 52°, low 33°.
0Glen Carbon, Tuesday, 17 November
Clear. High 53°, low 35°.
0Glen Carbon, Wednesday, 18 November
Overcast. High 60°, low 38°.
0Glen Carbon, Thursday, 19 November
Overcast. High 59°, low 48°.
0Glen Carbon, Friday, 20 November
Overcast. High 66°, low 56°.
0Glen Carbon, Saturday, 21 November
Clear. High 71°, low 51°.
0Glen Carbon, Sunday, 22 November
Overcast. High 69°, low 53°.
0.88
Glen Carbon, Monday, 23 November
Rain. High 58°, low 42°.
0.09
Glen Carbon, Tuesday, 24 November
Snow. High 38°, low 26°.
0Glen Carbon, Wednesday, 25 November
Clear. High 36°, low 21°.
0Glen Carbon, Thursday, 26 November
Overcast. High 39°, low 23°.
0
Glen Carbon, Friday, 27 November
Mostly clear. High 44°, low 25°.
0Glen Carbon, Saturday, 28 November
Overcast. High 48°, low 32°.
0.08
Glen Carbon, Sunday, 29 November
Climate normal for this date — 60-year average.
0.18
Glen Carbon, Monday, 30 November
Climate normal for this date — 60-year average.
0.12Glen Carbon, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.09Glen Carbon, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.13Glen Carbon, Thursday, 3 December
Climate normal for this date — 60-year average.
0.08Glen Carbon, Friday, 4 December
Climate normal for this date — 60-year average.
0.09Glen Carbon, Saturday, 5 December
Climate normal for this date — 60-year average.
0.06Glen Carbon, Sunday, 6 December
Climate normal for this date — 60-year average.
0.09Glen Carbon, Monday, 7 December
Climate normal for this date — 60-year average.
0.08Glen Carbon, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.07Glen Carbon, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.11Glen Carbon, Thursday, 10 December
Climate normal for this date — 60-year average.
0.1Glen Carbon, Friday, 11 December
Climate normal for this date — 60-year average.
0.07Glen Carbon, Saturday, 12 December
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 Glen Carbon, 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 Glen Carbon, 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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