Weather in Glen Carbon, IL
Glen Carbon, Sunday, 15 November, 04:45
Partly cloudy. Feels like 32°. High 53°, low 29°.
Monthly outlook for Glen Carbon, IL: average high 58.6°, average low 41.2°. That is 4.4° above the climate normal for November. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 19 November (66.7°), the coolest 15 November (29.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 15 November – 24 November | 57.5° | 52.3° | +2.9° |
| 25 November – 4 December | 60.4° | 47.3° | +7.3° |
| 5 December – 14 December | at normal | 43.4° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Edwardsville (2 mi).
0
Glen Carbon, Monday, 16 November
Clear. High 56°, low 29°.
0Glen Carbon, Tuesday, 17 November
Clear. High 56°, low 35°.
0
Glen Carbon, Wednesday, 18 November
Overcast. High 60°, low 40°.
0Glen Carbon, Thursday, 19 November
Clear. High 67°, low 45°.
0
Glen Carbon, Friday, 20 November
Partly cloudy. High 65°, low 51°.
0.13
Glen Carbon, Saturday, 21 November
Rain. High 66°, low 48°.
0Glen Carbon, Sunday, 22 November
Clear. High 55°, low 42°.
0
Glen Carbon, Monday, 23 November
Mostly clear. High 48°, low 33°.
0Glen Carbon, Tuesday, 24 November
Overcast. High 50°, low 31°.
0Glen Carbon, Wednesday, 25 November
Mostly clear. High 58°, low 34°.
0Glen Carbon, Thursday, 26 November
Clear. High 62°, low 42°.
0Glen Carbon, Friday, 27 November
Overcast. High 61°, low 45°.
0Glen Carbon, Saturday, 28 November
Overcast. High 62°, low 47°.
0Glen Carbon, Sunday, 29 November
Overcast. High 63°, low 54°.
0.45Glen Carbon, Monday, 30 November
Rain. High 56°, low 54°.
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.
0.06
Glen 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.
0.09Glen Carbon, Sunday, 13 December
Climate normal for this date — 60-year average.
0.13Glen Carbon, Monday, 14 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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