Weather in St. Charles, IL
St. Charles, Saturday, 10 October, 21:55
Partly cloudy. Feels like 64°. High 80°, low 59°.
Monthly outlook for St. Charles, IL: average high 61.7°, average low 46°. That is 1° above the climate normal for October. Precipitation is expected on 1 day (about 0.6 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 12 October (83.3°), the coolest 18 October (28.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 10 October – 19 October | 64.2° | 60.8° | +1.9° |
| 20 October – 29 October | 57.5° | 57° | +0.3° |
| 30 October – 8 November | at normal | 52.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Elgin (8 mi).
0
St. Charles, Sunday, 11 October
Clear. High 78°, low 56°.
0St. Charles, Monday, 12 October
Clear. High 83°, low 64°.
0.02
St. Charles, Tuesday, 13 October
Light rain. High 76°, low 66°.
0.6St. Charles, Wednesday, 14 October
Rain. High 69°, low 56°.
0
St. Charles, Thursday, 15 October
Overcast. High 59°, low 50°.
0.02
St. Charles, Friday, 16 October
Light snow. High 55°, low 38°.
0St. Charles, Saturday, 17 October
Overcast. High 42°, low 32°.
0St. Charles, Sunday, 18 October
Overcast. High 45°, low 29°.
0
St. Charles, Monday, 19 October
Partly cloudy. High 54°, low 36°.
0St. Charles, Tuesday, 20 October
Clear. High 60°, low 39°.
0St. Charles, Wednesday, 21 October
Partly cloudy. High 63°, low 42°.
0St. Charles, Thursday, 22 October
Clear. High 59°, low 46°.
0St. Charles, Friday, 23 October
Overcast. High 54°, low 39°.
0St. Charles, Saturday, 24 October
Partly cloudy. High 55°, low 38°.
0St. Charles, Sunday, 25 October
Overcast. High 55°, low 47°.
0.09St. Charles, Monday, 26 October
Climate normal for this date — 60-year average.
0.08St. Charles, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.04
St. Charles, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.05St. Charles, Thursday, 29 October
Climate normal for this date — 60-year average.
0.11St. Charles, Friday, 30 October
Climate normal for this date — 60-year average.
0.12
St. Charles, Saturday, 31 October
Climate normal for this date — 60-year average.
0.17St. Charles, Sunday, 1 November
Climate normal for this date — 60-year average.
0.11St. Charles, Monday, 2 November
Climate normal for this date — 60-year average.
0.06St. Charles, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.09St. Charles, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.12St. Charles, Thursday, 5 November
Climate normal for this date — 60-year average.
0.08St. Charles, Friday, 6 November
Climate normal for this date — 60-year average.
0.04St. Charles, Saturday, 7 November
Climate normal for this date — 60-year average.
0.05St. Charles, Sunday, 8 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 St. Charles, 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 St. Charles, 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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