Weather in Arthur, IL
Arthur, Monday, 12 October, 01:45
Overcast. Feels like 67°. High 88°, low 63°.
Monthly outlook for Arthur, IL: average high 68.8°, average low 52.5°. That is 3.1° above the climate normal for October. Precipitation is expected on 3 days (about 2.2 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 13 October (87.8°), the coolest 18 October (35.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 12 October – 21 October | 74.4° | 64.2° | +5.7° |
| 22 October – 31 October | 59.3° | 60.7° | -0.8° |
| 1 November – 10 November | at normal | 56.1° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Lake City (13 mi).
0
Arthur, Tuesday, 13 October
Clear. High 88°, low 68°.
0.56
Arthur, Wednesday, 14 October
Heavy rain. High 80°, low 69°.
0.91Arthur, Thursday, 15 October
Rain. High 77°, low 67°.
0.02Arthur, Friday, 16 October
Light rain. High 67°, low 51°.
0Arthur, Saturday, 17 October
Clear. High 58°, low 42°.
0Arthur, Sunday, 18 October
Clear. High 64°, low 36°.
0Arthur, Monday, 19 October
Overcast. High 69°, low 48°.
0Arthur, Tuesday, 20 October
Overcast. High 74°, low 55°.
0.01Arthur, Wednesday, 21 October
Light rain. High 79°, low 60°.
0.64Arthur, Thursday, 22 October
Rain. High 72°, low 54°.
0Arthur, Friday, 23 October
Clear. High 54°, low 47°.
0Arthur, Saturday, 24 October
Clear. High 55°, low 38°.
0.03Arthur, Sunday, 25 October
Light rain. High 60°, low 47°.
0Arthur, Monday, 26 October
Overcast. High 58°, low 49°.
0Arthur, Tuesday, 27 October
Light rain. High 57°, low 49°.
0.06
Arthur, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.07
Arthur, Thursday, 29 October
Climate normal for this date — 60-year average.
0.11Arthur, Friday, 30 October
Climate normal for this date — 60-year average.
0.17
Arthur, Saturday, 31 October
Climate normal for this date — 60-year average.
0.2Arthur, Sunday, 1 November
Climate normal for this date — 60-year average.
0.09Arthur, Monday, 2 November
Climate normal for this date — 60-year average.
0.09Arthur, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.1Arthur, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.11Arthur, Thursday, 5 November
Climate normal for this date — 60-year average.
0.08Arthur, Friday, 6 November
Climate normal for this date — 60-year average.
0.09Arthur, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04Arthur, Sunday, 8 November
Climate normal for this date — 60-year average.
0.11Arthur, Monday, 9 November
Climate normal for this date — 60-year average.
0.14Arthur, Tuesday, 10 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 Arthur, 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 Arthur, 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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