Weather in Rochester, IL
Rochester, Thursday, 22 October, 13:03
Clear. Feels like 74°. High 74°, low 46°.
Monthly outlook for Rochester, IL: average high 65.6°, average low 48.7°. That is 3.5° above the climate normal for October. Precipitation is expected on 4 days (about 1.0 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 22 October (74.5°), the coolest 30 October (39.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 22 October – 31 October | 68.1° | 60.8° | +4° |
| 1 November – 10 November | 61.6° | 56.1° | +3.1° |
| 11 November – 20 November | at normal | 51.3° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Springfield (6 mi).
0Rochester, Friday, 23 October
Clear. High 74°, low 47°.
0
Rochester, Saturday, 24 October
Partly cloudy. High 71°, low 49°.
0
Rochester, Sunday, 25 October
Overcast. High 73°, low 51°.
0Rochester, Monday, 26 October
Overcast. High 72°, low 52°.
0Rochester, Tuesday, 27 October
Overcast. High 71°, low 51°.
0Rochester, Wednesday, 28 October
Clear. High 69°, low 54°.
0.16
Rochester, Thursday, 29 October
Light rain. High 63°, low 47°.
0Rochester, Friday, 30 October
Overcast. High 59°, low 39°.
0.46Rochester, Saturday, 31 October
Light rain. High 56°, low 47°.
0.23Rochester, Sunday, 1 November
Rain. High 62°, low 56°.
0Rochester, Monday, 2 November
Overcast. High 67°, low 56°.
0Rochester, Tuesday, 3 November
Clear. High 67°, low 48°.
0Rochester, Wednesday, 4 November
Clear. High 61°, low 46°.
0Rochester, Thursday, 5 November
Clear. High 59°, low 40°.
0.18Rochester, Friday, 6 November
Light rain. High 53°, low 49°.
0.07Rochester, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04
Rochester, Sunday, 8 November
Climate normal for this date — 60-year average.
0.11
Rochester, Monday, 9 November
Climate normal for this date — 60-year average.
0.15Rochester, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.09Rochester, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.06Rochester, Thursday, 12 November
Climate normal for this date — 60-year average.
0.06Rochester, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Rochester, Saturday, 14 November
Climate normal for this date — 60-year average.
0.1Rochester, Sunday, 15 November
Climate normal for this date — 60-year average.
0.08Rochester, Monday, 16 November
Climate normal for this date — 60-year average.
0.12Rochester, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.18Rochester, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.08Rochester, Thursday, 19 November
Climate normal for this date — 60-year average.
0.11Rochester, Friday, 20 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 Rochester, 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 Rochester, 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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