Weather in Sunnyvale, CA
Sunnyvale, Wednesday, 21 October, 13:32
Rain. Feels like 64°. High 65°, low 57°.
Monthly outlook for Sunnyvale, CA: average high 69.5°, average low 55.5°. That is 0.2° below the climate normal for October. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 2 days and 0.7 inches. The warmest day looks like 27 October (77.8°), the coolest 26 October (51.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 21 October – 30 October | 70.2° | 70.4° | -0.1° |
| 31 October – 9 November | 68.3° | 67.5° | +0.4° |
| 10 November – 19 November | at normal | 63.4° | — |
October records over 66 years
0.5Sunnyvale, Thursday, 22 October
Rain. High 64°, low 57°.
0
Sunnyvale, Friday, 23 October
Overcast. High 67°, low 52°.
0
Sunnyvale, Saturday, 24 October
Clear. High 68°, low 52°.
0Sunnyvale, Sunday, 25 October
Overcast. High 69°, low 53°.
0Sunnyvale, Monday, 26 October
Overcast. High 68°, low 52°.
0Sunnyvale, Tuesday, 27 October
Overcast. High 78°, low 52°.
0Sunnyvale, Wednesday, 28 October
Overcast. High 76°, low 60°.
0
Sunnyvale, Thursday, 29 October
Mostly clear. High 74°, low 59°.
0Sunnyvale, Friday, 30 October
Clear. High 73°, low 58°.
0Sunnyvale, Saturday, 31 October
Overcast. High 67°, low 54°.
0
Sunnyvale, Sunday, 1 November
Partly cloudy. High 71°, low 53°.
0.03Sunnyvale, Monday, 2 November
Light rain. High 65°, low 59°.
0Sunnyvale, Tuesday, 3 November
Overcast. High 71°, low 59°.
0Sunnyvale, Wednesday, 4 November
Overcast. High 71°, low 57°.
0Sunnyvale, Thursday, 5 November
Partly cloudy. High 65°, low 54°.
0.05Sunnyvale, Friday, 6 November
Climate normal for this date — 60-year average.
0.06Sunnyvale, Saturday, 7 November
Climate normal for this date — 60-year average.
0.07Sunnyvale, Sunday, 8 November
Climate normal for this date — 60-year average.
0.05Sunnyvale, Monday, 9 November
Climate normal for this date — 60-year average.
0.08Sunnyvale, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.07Sunnyvale, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.06Sunnyvale, Thursday, 12 November
Climate normal for this date — 60-year average.
0.13Sunnyvale, Friday, 13 November
Climate normal for this date — 60-year average.
0.06Sunnyvale, Saturday, 14 November
Climate normal for this date — 60-year average.
0.06Sunnyvale, Sunday, 15 November
Climate normal for this date — 60-year average.
0.1Sunnyvale, Monday, 16 November
Climate normal for this date — 60-year average.
0.11Sunnyvale, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.06Sunnyvale, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.03Sunnyvale, Thursday, 19 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 Sunnyvale, 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 Sunnyvale, 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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