Weather in Byron, IL
Byron, Monday, 12 October, 03:21
Light rain. Feels like 62°. High 85°, low 62°.
Monthly outlook for Byron, IL: average high 63.1°, average low 49.5°. That is 2.6° above the climate normal for October. Precipitation is expected on 4 days (about 1.5 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 12 October (84.7°), the coolest 17 October (37.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 12 October – 21 October | 66.8° | 59.6° | +4° |
| 22 October – 31 October | 56.9° | 56° | +0.5° |
| 1 November – 10 November | at normal | 51° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Rockford (14 mi).
0.2Byron, Tuesday, 13 October
Heavy rain. High 79°, low 63°.
0.03Byron, Wednesday, 14 October
Light rain. High 71°, low 58°.
0.55Byron, Thursday, 15 October
Rain. High 57°, low 55°.
0
Byron, Friday, 16 October
Overcast. High 56°, low 45°.
0
Byron, Saturday, 17 October
Clear. High 58°, low 37°.
0Byron, Sunday, 18 October
Clear. High 59°, low 39°.
0Byron, Monday, 19 October
Overcast. High 64°, low 44°.
0Byron, Tuesday, 20 October
Overcast. High 67°, low 54°.
0
Byron, Wednesday, 21 October
Partly cloudy. High 71°, low 55°.
0Byron, Thursday, 22 October
Partly cloudy. High 72°, low 56°.
0.24Byron, Friday, 23 October
Rain. High 66°, low 50°.
0Byron, Saturday, 24 October
Clear. High 58°, low 42°.
0.45Byron, Sunday, 25 October
Rain. High 46°, low 43°.
0Byron, Monday, 26 October
Overcast. High 48°, low 45°.
0.04Byron, Tuesday, 27 October
Light rain. High 50°, low 44°.
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.
0.05Byron, Sunday, 8 November
Climate normal for this date — 60-year average.
0.11Byron, Monday, 9 November
Climate normal for this date — 60-year average.
0.11Byron, 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 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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