Weather in Rochester, CA
Rochester, Monday, 19 October, 17:00
Clear. Feels like 82°. High 83°, low 59°.
Monthly outlook for Rochester, CA: average high 78.4°, average low 63.7°. That is 1.5° above the climate normal for October. Precipitation is expected on 3 days (about 0.8 inches), against a normal of 2 days and 0.6 inches. The warmest day looks like 28 October (87.3°), the coolest 23 October (50.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 19 October – 28 October | 76.7° | 76.7° | -0° |
| 29 October – 7 November | 81.3° | 73.4° | +4.3° |
| 8 November – 17 November | at normal | 69.7° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Rancho Cucamonga (3 mi).
0Rochester, Tuesday, 20 October
Clear. High 82°, low 61°.
0.23
Rochester, Wednesday, 21 October
Rain. High 69°, low 58°.
0.44Rochester, Thursday, 22 October
Rain. High 60°, low 51°.
0.1Rochester, Friday, 23 October
Light rain. High 61°, low 50°.
0Rochester, Saturday, 24 October
Clear. High 68°, low 51°.
0
Rochester, Sunday, 25 October
Mostly clear. High 84°, low 58°.
0Rochester, Monday, 26 October
Clear. High 87°, low 69°.
0
Rochester, Tuesday, 27 October
Overcast. High 86°, low 72°.
0
Rochester, Wednesday, 28 October
Partly cloudy. High 87°, low 71°.
0Rochester, Thursday, 29 October
Overcast. High 85°, low 74°.
0Rochester, Friday, 30 October
Partly cloudy. High 83°, low 71°.
0Rochester, Saturday, 31 October
Overcast. High 81°, low 69°.
0Rochester, Sunday, 1 November
Overcast. High 83°, low 70°.
0.02Rochester, Monday, 2 November
Light rain. High 83°, low 70°.
0Rochester, Tuesday, 3 November
Partly cloudy. High 74°, low 66°.
0.03Rochester, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.01Rochester, Thursday, 5 November
Climate normal for this date — 60-year average.
0.02Rochester, Friday, 6 November
Climate normal for this date — 60-year average.
0.09Rochester, Saturday, 7 November
Climate normal for this date — 60-year average.
0.1Rochester, Sunday, 8 November
Climate normal for this date — 60-year average.
0.06Rochester, Monday, 9 November
Climate normal for this date — 60-year average.
0.04Rochester, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.07Rochester, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.04Rochester, Thursday, 12 November
Climate normal for this date — 60-year average.
0.04Rochester, Friday, 13 November
Climate normal for this date — 60-year average.
0.05Rochester, Saturday, 14 November
Climate normal for this date — 60-year average.
0.07Rochester, Sunday, 15 November
Climate normal for this date — 60-year average.
0.06Rochester, Monday, 16 November
Climate normal for this date — 60-year average.
0.04Rochester, Tuesday, 17 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, CA 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, CA 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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