Weather in Byron, IL
Byron, Friday, 9 October, 09:11
Overcast. Feels like 54°. High 74°, low 52°.
Monthly outlook for Byron, IL: average high 62.6°, average low 48°. That is 1.5° above the climate normal for October. Precipitation is expected on 3 days (about 1.8 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 12 October (81.6°), the coolest 18 October (31.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 October – 18 October | 65.9° | 61° | +2.7° |
| 19 October – 28 October | 57.2° | 57° | +0.1° |
| 29 October – 7 November | at normal | 52.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Rockford (14 mi).
0Byron, Saturday, 10 October
Overcast. High 78°, low 59°.
0
Byron, Sunday, 11 October
Clear. High 76°, low 54°.
0Byron, Monday, 12 October
Clear. High 82°, low 64°.
0Byron, Tuesday, 13 October
Overcast. High 72°, low 61°.
0Byron, Wednesday, 14 October
Overcast. High 64°, low 56°.
0.36
Byron, Thursday, 15 October
Rain. High 59°, low 52°.
0.89Byron, Friday, 16 October
Heavy rain. High 58°, low 41°.
0
Byron, Saturday, 17 October
Partly cloudy. High 45°, low 35°.
0Byron, Sunday, 18 October
Overcast. High 51°, low 32°.
0Byron, Monday, 19 October
Overcast. High 60°, low 39°.
0Byron, Tuesday, 20 October
Clear. High 64°, low 44°.
0.03Byron, Wednesday, 21 October
Light rain. High 65°, low 52°.
0.51Byron, Thursday, 22 October
Rain. High 59°, low 55°.
0Byron, Friday, 23 October
Overcast. High 49°, low 39°.
0Byron, Saturday, 24 October
Clear. High 46°, low 33°.
0.09Byron, Sunday, 25 October
Climate normal for this date — 60-year average.
0.11Byron, Monday, 26 October
Climate normal for this date — 60-year average.
0.07Byron, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.04Byron, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.06Byron, Thursday, 29 October
Climate normal for this date — 60-year average.
0.09Byron, Friday, 30 October
Climate normal for this date — 60-year average.
0.1
Byron, Saturday, 31 October
Climate normal for this date — 60-year average.
0.16Byron, Sunday, 1 November
Climate normal for this date — 60-year average.
0.1Byron, Monday, 2 November
Climate normal for this date — 60-year average.
0.06Byron, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.09Byron, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.11Byron, Thursday, 5 November
Climate normal for this date — 60-year average.
0.09Byron, Friday, 6 November
Climate normal for this date — 60-year average.
0.03
Byron, Saturday, 7 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 Byron, 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 Byron, 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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