Weather in Grass Valley, CA
Grass Valley, Saturday, 17 October, 13:07
Clear. Feels like 79°. High 81°, low 47°.
Monthly outlook for Grass Valley, CA: average high 62.1°, average low 45.2°. That is 2.9° below the climate normal for October. Precipitation is expected on 7 days (about 4.1 inches), against a normal of 3 days and 1.9 inches. The warmest day looks like 17 October (81.3°), the coolest 30 October (34.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 17 October – 26 October | 66.5° | 69° | -1.4° |
| 27 October – 5 November | 54.7° | 64.1° | -5.2° |
| 6 November – 15 November | at normal | 59.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Alta Sierra (7 mi).
0Grass Valley, Sunday, 18 October
Clear. High 77°, low 56°.
0
Grass Valley, Monday, 19 October
Overcast. High 65°, low 50°.
0Grass Valley, Tuesday, 20 October
Overcast. High 67°, low 46°.
0.06
Grass Valley, Wednesday, 21 October
Light rain. High 67°, low 52°.
0.54Grass Valley, Thursday, 22 October
Rain. High 57°, low 47°.
0
Grass Valley, Friday, 23 October
Partly cloudy. High 64°, low 46°.
0.26Grass Valley, Saturday, 24 October
Rain. High 60°, low 48°.
0.99Grass Valley, Sunday, 25 October
Rain. High 60°, low 45°.
0Grass Valley, Monday, 26 October
Clear. High 66°, low 43°.
0Grass Valley, Tuesday, 27 October
Overcast. High 65°, low 48°.
0Grass Valley, Wednesday, 28 October
Overcast. High 64°, low 45°.
0.17Grass Valley, Thursday, 29 October
Rain. High 51°, low 37°.
0
Grass Valley, Friday, 30 October
Mostly clear. High 54°, low 34°.
0.55Grass Valley, Saturday, 31 October
Rain. High 50°, low 38°.
1.54Grass Valley, Sunday, 1 November
Rain. High 44°, low 41°.
0.13Grass Valley, Monday, 2 November
Climate normal for this date — 60-year average.
0.13Grass Valley, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.12Grass Valley, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.16Grass Valley, Thursday, 5 November
Climate normal for this date — 60-year average.
0.21Grass Valley, Friday, 6 November
Climate normal for this date — 60-year average.
0.17
Grass Valley, Saturday, 7 November
Climate normal for this date — 60-year average.
0.19Grass Valley, Sunday, 8 November
Climate normal for this date — 60-year average.
0.17Grass Valley, Monday, 9 November
Climate normal for this date — 60-year average.
0.19Grass Valley, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.21Grass Valley, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.17Grass Valley, Thursday, 12 November
Climate normal for this date — 60-year average.
0.26Grass Valley, Friday, 13 November
Climate normal for this date — 60-year average.
0.17Grass 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.
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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