Weather in Grass Valley, CA
Grass Valley, Friday, 16 October, 14:25
Clear. Feels like 79°. High 81°, low 45°.
Monthly outlook for Grass Valley, CA: average high 63.1°, average low 43.8°. That is 2.6° below the climate normal for October. Precipitation is expected on 3 days (about 1.6 inches), against a normal of 3 days and 1.9 inches. The warmest day looks like 18 October (81.1°), the coolest 26 October (39.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 16 October – 25 October | 68.5° | 69.4° | -0.5° |
| 26 October – 4 November | 54.1° | 64.6° | -5.8° |
| 5 November – 14 November | at normal | 59.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Alta Sierra (7 mi).
0Grass Valley, Saturday, 17 October
Clear. High 79°, low 46°.
0Grass Valley, Sunday, 18 October
Clear. High 81°, low 44°.
0.01
Grass Valley, Monday, 19 October
Light rain. High 65°, low 49°.
0.02Grass Valley, Tuesday, 20 October
Light rain. High 62°, low 47°.
0.03Grass Valley, Wednesday, 21 October
Light rain. High 69°, low 47°.
0
Grass Valley, Thursday, 22 October
Overcast. High 62°, low 47°.
0Grass Valley, Friday, 23 October
Clear. High 60°, low 44°.
0Grass Valley, Saturday, 24 October
Clear. High 66°, low 42°.
0Grass Valley, Sunday, 25 October
Overcast. High 61°, low 45°.
0.67Grass Valley, Monday, 26 October
Rain. High 46°, low 39°.
0.25Grass Valley, Tuesday, 27 October
Light rain. High 48°, low 41°.
0.58Grass Valley, Wednesday, 28 October
Rain. High 53°, low 42°.
0Grass Valley, Thursday, 29 October
Overcast. High 57°, low 43°.
0Grass Valley, Friday, 30 October
Overcast. High 57°, low 42°.
0Grass Valley, Saturday, 31 October
Clear. High 63°, low 40°.
0.11
Grass Valley, Sunday, 1 November
Climate normal for this date — 60-year average.
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.
0.12
Grass 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.
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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