Weather in Glen Carbon, IL
Glen Carbon, Thursday, 12 November, 12:06
Overcast. Feels like 43°. High 50°, low 40°.
Monthly outlook for Glen Carbon, IL: average high 56.5°, average low 41.2°. That is 2.6° above the climate normal for November. Precipitation is expected on 5 days (about 3.0 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 19 November (69.5°), the coolest 15 November (31°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 12 November – 21 November | 56.5° | 53° | +1.9° |
| 22 November – 1 December | 56.6° | 48.7° | +4.4° |
| 2 December – 11 December | at normal | 44.2° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Edwardsville (2 mi).
0Glen Carbon, Friday, 13 November
Overcast. High 48°, low 39°.
0
Glen Carbon, Saturday, 14 November
Clear. High 46°, low 32°.
0Glen Carbon, Sunday, 15 November
Overcast. High 49°, low 31°.
0Glen Carbon, Monday, 16 November
Clear. High 52°, low 32°.
0Glen Carbon, Tuesday, 17 November
Clear. High 54°, low 34°.
0
Glen Carbon, Wednesday, 18 November
Mostly clear. High 63°, low 39°.
0.01
Glen Carbon, Thursday, 19 November
Light rain. High 69°, low 47°.
0.06Glen Carbon, Friday, 20 November
Light rain. High 65°, low 51°.
0Glen Carbon, Saturday, 21 November
Overcast. High 69°, low 57°.
0.04Glen Carbon, Sunday, 22 November
Light rain. High 69°, low 58°.
1.39Glen Carbon, Monday, 23 November
Heavy rain. High 61°, low 53°.
0.57Glen Carbon, Tuesday, 24 November
Heavy rain. High 61°, low 39°.
0Glen Carbon, Wednesday, 25 November
Clear. High 42°, low 32°.
0Glen Carbon, Thursday, 26 November
Overcast. High 46°, low 32°.
0.89Glen Carbon, Friday, 27 November
Rain. High 62°, low 43°.
0.11
Glen Carbon, Saturday, 28 November
Climate normal for this date — 60-year average.
0.08Glen 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.
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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