Weather in Grass Valley, CA
Grass Valley, Saturday, 31 October, 08:35
Overcast. Feels like 49°. High 54°, low 45°.
Monthly outlook for Grass Valley, CA: average high 66.4°, average low 47.7°. That is 3.1° above the climate normal for October. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 4 days and 2.6 inches. The warmest day looks like 7 November (73.9°), the coolest 5 November (38.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 31 October – 9 November | 64.6° | 62.3° | +1.3° |
| 10 November – 19 November | 69.4° | 57.8° | +6.5° |
| 20 November – 29 November | at normal | 54.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Alta Sierra (7 mi).
0.01
Grass Valley, Sunday, 1 November
Light rain. High 59°, low 41°.
0
Grass Valley, Monday, 2 November
Partly cloudy. High 62°, low 40°.
0.18Grass Valley, Tuesday, 3 November
Light rain. High 60°, low 45°.
0
Grass Valley, Wednesday, 4 November
Mostly clear. High 60°, low 40°.
0
Grass Valley, Thursday, 5 November
Clear. High 63°, low 38°.
0Grass Valley, Friday, 6 November
Overcast. High 69°, low 47°.
0Grass Valley, Saturday, 7 November
Mostly clear. High 74°, low 51°.
0Grass Valley, Sunday, 8 November
Overcast. High 73°, low 53°.
0Grass Valley, Monday, 9 November
Overcast. High 72°, low 54°.
0Grass Valley, Tuesday, 10 November
Overcast. High 71°, low 52°.
0Grass Valley, Wednesday, 11 November
Partly cloudy. High 68°, low 50°.
0Grass Valley, Thursday, 12 November
Clear. High 69°, low 49°.
0Grass Valley, Friday, 13 November
Overcast. High 71°, low 51°.
0Grass Valley, Saturday, 14 November
Overcast. High 68°, low 51°.
0Grass Valley, Sunday, 15 November
Overcast. High 70°, low 55°.
0.23
Grass Valley, Monday, 16 November
Climate normal for this date — 60-year average.
0.28Grass Valley, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.23Grass Valley, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.18Grass Valley, Thursday, 19 November
Climate normal for this date — 60-year average.
0.24Grass Valley, Friday, 20 November
Climate normal for this date — 60-year average.
0.29Grass Valley, Saturday, 21 November
Climate normal for this date — 60-year average.
0.24Grass Valley, Sunday, 22 November
Climate normal for this date — 60-year average.
0.23Grass Valley, Monday, 23 November
Climate normal for this date — 60-year average.
0.22Grass Valley, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.18Grass Valley, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.17Grass Valley, Thursday, 26 November
Climate normal for this date — 60-year average.
0.18Grass Valley, Friday, 27 November
Climate normal for this date — 60-year average.
0.18Grass Valley, Saturday, 28 November
Climate normal for this date — 60-year average.
0.27Grass Valley, Sunday, 29 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 Grass Valley, 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 Grass Valley, 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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