Weather in Rochester, CA
Rochester, Saturday, 17 October, 05:46
Mostly clear. Feels like 71°. High 86°, low 72°.
Monthly outlook for Rochester, CA: average high 74.1°, average low 61.4°. That is 1.1° below the climate normal for October. Precipitation is expected on 3 days (about 1.1 inches), against a normal of 2 days and 0.6 inches. The warmest day looks like 17 October (85.6°), the coolest 30 October (53.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 17 October – 26 October | 75.5° | 77.5° | -1.1° |
| 27 October – 5 November | 71.8° | 74.1° | -1.3° |
| 6 November – 15 November | at normal | 70.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Rancho Cucamonga (3 mi).
0
Rochester, Sunday, 18 October
Clear. High 86°, low 64°.
0Rochester, Monday, 19 October
Clear. High 77°, low 61°.
0Rochester, Tuesday, 20 October
Clear. High 75°, low 59°.
0.49
Rochester, Wednesday, 21 October
Rain. High 68°, low 58°.
0.31Rochester, Thursday, 22 October
Rain. High 60°, low 57°.
0.01Rochester, Friday, 23 October
Light rain. High 71°, low 61°.
0Rochester, Saturday, 24 October
Clear. High 76°, low 62°.
0
Rochester, Sunday, 25 October
Overcast. High 78°, low 62°.
0Rochester, Monday, 26 October
Overcast. High 80°, low 66°.
0Rochester, Tuesday, 27 October
Clear. High 77°, low 66°.
0Rochester, Wednesday, 28 October
Clear. High 77°, low 65°.
0.29Rochester, Thursday, 29 October
Rain. High 64°, low 58°.
0.02Rochester, Friday, 30 October
Light rain. High 64°, low 53°.
0Rochester, Saturday, 31 October
Clear. High 71°, low 58°.
0Rochester, Sunday, 1 November
Clear. High 78°, low 62°.
0.04
Rochester, Monday, 2 November
Climate normal for this date — 60-year average.
0.02Rochester, Tuesday, 3 November
Climate normal for this date — 60-year average.
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.
0.1
Rochester, 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.
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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