Weather in Arthur, IL
Arthur, Wednesday, 14 October, 19:09
Overcast. Feels like 75°. High 74°, low 68°.
Monthly outlook for Arthur, IL: average high 67°, average low 51.2°. That is 2.7° above the climate normal for October. Precipitation is expected on 5 days (about 0.9 inches), against a normal of 4 days and 1.7 inches. The warmest day looks like 24 October (82°), the coolest 19 October (39°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 14 October – 23 October | 69° | 63.5° | +3.1° |
| 24 October – 2 November | 63.7° | 59.8° | +2.2° |
| 3 November – 12 November | at normal | 54.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Lake City (13 mi).
0.34
Arthur, Thursday, 15 October
Rain. High 76°, low 66°.
0.13Arthur, Friday, 16 October
Light rain. High 66°, low 50°.
0
Arthur, Saturday, 17 October
Clear. High 57°, low 42°.
0Arthur, Sunday, 18 October
Clear. High 62°, low 40°.
0
Arthur, Monday, 19 October
Mostly clear. High 66°, low 39°.
0
Arthur, Tuesday, 20 October
Partly cloudy. High 72°, low 44°.
0Arthur, Wednesday, 21 October
Mostly clear. High 75°, low 61°.
0.14Arthur, Thursday, 22 October
Light rain. High 66°, low 62°.
0Arthur, Friday, 23 October
Clear. High 77°, low 59°.
0Arthur, Saturday, 24 October
Overcast. High 82°, low 60°.
0Arthur, Sunday, 25 October
Overcast. High 60°, low 49°.
0Arthur, Monday, 26 October
Clear. High 58°, low 43°.
0Arthur, Tuesday, 27 October
Overcast. High 60°, low 42°.
0.14Arthur, Wednesday, 28 October
Rain. High 60°, low 48°.
0.19Arthur, Thursday, 29 October
Rain. High 62°, low 47°.
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.
0.1Arthur, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.07Arthur, Thursday, 12 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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