Weather in Grass Valley, MT
Grass Valley, Friday, 16 October, 05:05
Partly cloudy. Feels like 37°. High 70°, low 35°.
Monthly outlook for Grass Valley, MT: average high 54.7°, average low 37.4°. That is 4.2° above the climate normal for October. Precipitation is expected on 5 days (about 1.3 inches), against a normal of 5 days and 1.1 inches. The warmest day looks like 16 October (69.6°), the coolest 25 October (29.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 16 October – 25 October | 60.4° | 49.3° | +6.2° |
| 26 October – 4 November | 45.1° | 42.4° | +1.5° |
| 5 November – 14 November | at normal | 37.9° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Evaro (11 mi).
0
Grass Valley, Saturday, 17 October
Partly cloudy. High 70°, low 41°.
0
Grass Valley, Sunday, 18 October
Mostly clear. High 59°, low 34°.
0
Grass Valley, Monday, 19 October
Overcast. High 64°, low 40°.
0Grass Valley, Tuesday, 20 October
Mostly clear. High 62°, low 39°.
0Grass Valley, Wednesday, 21 October
Partly cloudy. High 60°, low 40°.
0
Grass Valley, Thursday, 22 October
Clear. High 68°, low 40°.
0.17
Grass Valley, Friday, 23 October
Light rain. High 55°, low 41°.
0.02Grass Valley, Saturday, 24 October
Light rain. High 47°, low 35°.
0Grass Valley, Sunday, 25 October
Overcast. High 50°, low 30°.
0Grass Valley, Monday, 26 October
Overcast. High 48°, low 35°.
0.3
Grass Valley, Tuesday, 27 October
Snow. High 42°, low 40°.
0.64Grass Valley, Wednesday, 28 October
Snow. High 43°, low 39°.
0.14Grass Valley, Thursday, 29 October
Snow. High 43°, low 37°.
0Grass Valley, Friday, 30 October
Overcast. High 49°, low 38°.
0.07Grass Valley, Saturday, 31 October
Light rain. High 46°, low 36°.
0.09
Grass Valley, Sunday, 1 November
Climate normal for this date — 60-year average.
0.1Grass Valley, Monday, 2 November
Climate normal for this date — 60-year average.
0.05Grass Valley, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.1Grass Valley, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.09Grass Valley, Thursday, 5 November
Climate normal for this date — 60-year average.
0.1Grass Valley, Friday, 6 November
Climate normal for this date — 60-year average.
0.11Grass Valley, Saturday, 7 November
Climate normal for this date — 60-year average.
0.07Grass Valley, Sunday, 8 November
Climate normal for this date — 60-year average.
0.07Grass Valley, Monday, 9 November
Climate normal for this date — 60-year average.
0.06Grass Valley, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.07Grass Valley, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.08Grass Valley, Thursday, 12 November
Climate normal for this date — 60-year average.
0.09Grass Valley, Friday, 13 November
Climate normal for this date — 60-year average.
0.08Grass 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, MT 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, MT 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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