Weather in Rochester, CA
Rochester, Saturday, 17 October, 12:44
Partly cloudy. Feels like 81°. High 84°, low 73°.
Monthly outlook for Rochester, CA: average high 73.8°, average low 62.5°. That is 1.3° below the climate normal for October. Precipitation is expected on 4 days (about 1.3 inches), against a normal of 2 days and 0.6 inches. The warmest day looks like 18 October (86.6°), the coolest 22 October (54.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 17 October – 26 October | 76.1° | 77.5° | -0.8° |
| 27 October – 5 November | 69.9° | 74.1° | -2.3° |
| 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 87°, low 71°.
0Rochester, Monday, 19 October
Clear. High 78°, low 62°.
0Rochester, Tuesday, 20 October
Clear. High 76°, low 60°.
0.31
Rochester, Wednesday, 21 October
Rain. High 67°, low 58°.
0.2Rochester, Thursday, 22 October
Light rain. High 63°, low 55°.
0Rochester, Friday, 23 October
Partly cloudy. High 72°, low 56°.
0Rochester, Saturday, 24 October
Clear. High 79°, low 64°.
0Rochester, Sunday, 25 October
Partly cloudy. High 76°, low 66°.
0Rochester, Monday, 26 October
Clear. High 79°, low 65°.
0
Rochester, Tuesday, 27 October
Mostly clear. High 80°, low 68°.
0
Rochester, Wednesday, 28 October
Overcast. High 74°, low 66°.
0.04Rochester, Thursday, 29 October
Light rain. High 67°, low 62°.
0Rochester, Friday, 30 October
Partly cloudy. High 70°, low 58°.
0Rochester, Saturday, 31 October
Overcast. High 69°, low 61°.
0.79Rochester, Sunday, 1 November
Rain. High 60°, low 55°.
0.04Rochester, 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.
0.1Rochester, 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.
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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