Weather in Grass Valley, CA
Grass Valley, Wednesday, 28 October, 07:12
Overcast. Feels like 43°. High 62°, low 40°.
Monthly outlook for Grass Valley, CA: average high 60.9°, average low 44.8°. That is 0.6° below the climate normal for October. Precipitation is expected on 5 days (about 4.2 inches), against a normal of 4 days and 2.5 inches. The warmest day looks like 3 November (72.7°), the coolest 8 November (38°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 28 October – 6 November | 63.3° | 63.6° | -0.2° |
| 7 November – 16 November | 57° | 58.8° | -1° |
| 17 November – 26 November | at normal | 55.5° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Alta Sierra (7 mi).
0Grass Valley, Thursday, 29 October
Overcast. High 62°, low 42°.
0
Grass Valley, Friday, 30 October
Mostly clear. High 63°, low 47°.
0.29
Grass Valley, Saturday, 31 October
Rain. High 59°, low 46°.
0.01Grass Valley, Sunday, 1 November
Light rain. High 61°, low 40°.
0
Grass Valley, Monday, 2 November
Clear. High 65°, low 43°.
0Grass Valley, Tuesday, 3 November
Overcast. High 73°, low 47°.
0Grass Valley, Wednesday, 4 November
Clear. High 67°, low 51°.
0Grass Valley, Thursday, 5 November
Overcast. High 64°, low 48°.
0.04Grass Valley, Friday, 6 November
Light rain. High 56°, low 47°.
1.89Grass Valley, Saturday, 7 November
Heavy rain. High 56°, low 43°.
0Grass Valley, Sunday, 8 November
Clear. High 60°, low 38°.
0Grass Valley, Monday, 9 November
Overcast. High 63°, low 43°.
0.11Grass Valley, Tuesday, 10 November
Light rain. High 51°, low 47°.
0.02Grass Valley, Wednesday, 11 November
Light rain. High 58°, low 50°.
1.8Grass Valley, Thursday, 12 November
Heavy rain. High 55°, low 44°.
0.26
Grass Valley, Friday, 13 November
Climate normal for this date — 60-year average.
0.17
Grass Valley, Saturday, 14 November
Climate normal for this date — 60-year average.
0.13Grass 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.
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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