Weather in Glenarm, IL
Glenarm, Monday, 19 October, 06:13
Clear. Feels like 39°. High 69°, low 41°.
Monthly outlook for Glenarm, IL: average high 65.5°, average low 45.8°. That is 2.7° above the climate normal for October. Precipitation is expected on 1 day (about 0.7 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 25 October (75.4°), the coolest 30 October (31.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 19 October – 28 October | 68.9° | 61.5° | +4.1° |
| 29 October – 7 November | 59.8° | 57.6° | +1.2° |
| 8 November – 17 November | at normal | 52.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Springfield (10 mi).
0
Glenarm, Tuesday, 20 October
Clear. High 72°, low 43°.
0Glenarm, Wednesday, 21 October
Clear. High 71°, low 47°.
0Glenarm, Thursday, 22 October
Clear. High 71°, low 50°.
0Glenarm, Friday, 23 October
Clear. High 69°, low 50°.
0
Glenarm, Saturday, 24 October
Overcast. High 69°, low 50°.
0Glenarm, Sunday, 25 October
Overcast. High 75°, low 61°.
0Glenarm, Monday, 26 October
Overcast. High 72°, low 59°.
0Glenarm, Tuesday, 27 October
Overcast. High 71°, low 49°.
0
Glenarm, Wednesday, 28 October
Partly cloudy. High 50°, low 37°.
0Glenarm, Thursday, 29 October
Clear. High 50°, low 33°.
0Glenarm, Friday, 30 October
Clear. High 54°, low 32°.
0Glenarm, Saturday, 31 October
Overcast. High 59°, low 34°.
0Glenarm, Sunday, 1 November
Overcast. High 66°, low 44°.
0Glenarm, Monday, 2 November
Overcast. High 71°, low 51°.
0.66
Glenarm, Tuesday, 3 November
Rain. High 60°, low 54°.
0.11Glenarm, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.16Glenarm, Thursday, 5 November
Climate normal for this date — 60-year average.
0.08Glenarm, Friday, 6 November
Climate normal for this date — 60-year average.
0.07Glenarm, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04
Glenarm, Sunday, 8 November
Climate normal for this date — 60-year average.
0.11
Glenarm, Monday, 9 November
Climate normal for this date — 60-year average.
0.15Glenarm, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.09Glenarm, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.06Glenarm, Thursday, 12 November
Climate normal for this date — 60-year average.
0.06Glenarm, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Glenarm, Saturday, 14 November
Climate normal for this date — 60-year average.
0.1Glenarm, Sunday, 15 November
Climate normal for this date — 60-year average.
0.08Glenarm, Monday, 16 November
Climate normal for this date — 60-year average.
0.12Glenarm, 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 Glenarm, 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 Glenarm, 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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