Weather in Grass Valley, CA
Grass Valley, Thursday, 29 October, 19:09
Overcast. Feels like 50°. High 60°, low 40°.
Monthly outlook for Grass Valley, CA: average high 56.2°, average low 41.9°. That is 3° below the climate normal for October. Precipitation is expected on 9 days (about 5.0 inches), against a normal of 4 days and 2.6 inches. The warmest day looks like 3 November (69°), the coolest 6 November (35.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 29 October – 7 November | 59° | 63.3° | -2.4° |
| 8 November – 17 November | 51.4° | 58.4° | -3.9° |
| 18 November – 27 November | at normal | 55.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Alta Sierra (7 mi).
0.08
Grass Valley, Friday, 30 October
Light rain. High 58°, low 47°.
0.35Grass Valley, Saturday, 31 October
Rain. High 54°, low 47°.
0.54Grass Valley, Sunday, 1 November
Heavy rain. High 56°, low 42°.
0Grass Valley, Monday, 2 November
Overcast. High 63°, low 40°.
0Grass Valley, Tuesday, 3 November
Overcast. High 69°, low 41°.
0Grass Valley, Wednesday, 4 November
Overcast. High 62°, low 46°.
0.42Grass Valley, Thursday, 5 November
Rain. High 48°, low 39°.
0
Grass Valley, Friday, 6 November
Clear. High 62°, low 35°.
0Grass Valley, Saturday, 7 November
Overcast. High 57°, low 40°.
0Grass Valley, Sunday, 8 November
Overcast. High 58°, low 43°.
0.27Grass Valley, Monday, 9 November
Rain. High 56°, low 43°.
1.64Grass Valley, Tuesday, 10 November
Rain. High 50°, low 46°.
0.28Grass Valley, Wednesday, 11 November
Light rain. High 50°, low 42°.
1.36Grass Valley, Thursday, 12 November
Rain. High 44°, low 39°.
0.1Grass Valley, Friday, 13 November
Light rain. High 51°, low 40°.
0.17
Grass Valley, Saturday, 14 November
Climate normal for this date — 60-year average.
0.13
Grass Valley, Sunday, 15 November
Climate normal for this date — 60-year average.
0.23Grass 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.
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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