Weather in Grass Valley, MT
Grass Valley, Saturday, 17 October, 21:44
Partly cloudy. Feels like 48°. High 68°, low 36°.
Monthly outlook for Grass Valley, MT: average high 57.8°, average low 36.1°. That is 6.3° above the climate normal for October. Precipitation is expected on 6 days (about 0.8 inches), against a normal of 6 days and 1.1 inches. The warmest day looks like 17 October (67.6°), the coolest 18 October (27.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 17 October – 26 October | 61.3° | 48.7° | +7° |
| 27 October – 5 November | 52° | 42° | +5.6° |
| 6 November – 15 November | at normal | 37.5° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Evaro (11 mi).
0
Grass Valley, Sunday, 18 October
Clear. High 63°, low 27°.
0
Grass Valley, Monday, 19 October
Overcast. High 63°, low 30°.
0Grass Valley, Tuesday, 20 October
Overcast. High 63°, low 37°.
0
Grass Valley, Wednesday, 21 October
Partly cloudy. High 63°, low 40°.
0.12
Grass Valley, Thursday, 22 October
Light rain. High 62°, low 44°.
0.15Grass Valley, Friday, 23 October
Light rain. High 48°, low 42°.
0
Grass Valley, Saturday, 24 October
Mostly clear. High 56°, low 38°.
0Grass Valley, Sunday, 25 October
Partly cloudy. High 63°, low 36°.
0Grass Valley, Monday, 26 October
Clear. High 64°, low 38°.
0Grass Valley, Tuesday, 27 October
Clear. High 66°, low 39°.
0Grass Valley, Wednesday, 28 October
Overcast. High 55°, low 39°.
0.04Grass Valley, Thursday, 29 October
Light rain. High 50°, low 40°.
0.07
Grass Valley, Friday, 30 October
Snow. High 49°, low 33°.
0.11Grass Valley, Saturday, 31 October
Snow. High 47°, low 28°.
0.27Grass Valley, Sunday, 1 November
Snow. High 44°, low 32°.
0.1
Grass 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.
0.03Grass 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, 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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