As of 05:55 MDT

Weather in Grass Valley, MT

36°Current weather

Grass Valley, Sunday, 25 October, 05:55

Partly cloudy. Feels like 36°. High 53°, low 33°.

Pressure30.21 inHg
Wind0.4 mph W
Humidity89%
Visibility6.2 mi
Dew point33°

Monthly outlook for Grass Valley, MT: average high 50.5°, average low 34.2°. That is 5° above the climate normal for October. Precipitation is expected on 5 days (about 0.9 inches), against a normal of 6 days and 1.3 inches. The warmest day looks like 6 November (66.4°), the coolest 30 October (29.3°).

50.5°/34.2°
Average high / low
+5°
Above normal
5 / 6
Wet days / normal
0.9 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
25 October – 3 November48.6°43°+3.1°
4 November – 13 November53.7°38.3°+8.5°
14 November – 23 Novemberat normal34.5°—

October records over 66 years

78.4°1 October 1992All-time high
-12.5°29 October 2019All-time low

Climate normals and records are computed from the nearest reference point — Evaro (11 mi).

Mon, 2650° / 32°0.12Rain
50 °Rain

Grass Valley, Monday, 26 October

Rain. High 50°, low 32°.

Pressure30.06 inHg
Wind1.2 mph W
Humidity69%
Visibility6.2 mi
Dew point30°
Tue, 2744° / 36°0.15Light rain
44 °Light rain

Grass Valley, Tuesday, 27 October

Light rain. High 44°, low 36°.

Pressure29.97 inHg
Wind1.4 mph S
Humidity90%
Visibility6.2 mi
Dew point37°
Wed, 2840° / 33°0.16Snow
40 °Snow

Grass Valley, Wednesday, 28 October

Snow. High 40°, low 33°.

Pressure30.00 inHg
Wind1.6 mph E
Humidity80%
Visibility6.2 mi
Dew point33°
Thu, 2946° / 30°0Overcast
46 °Overcast

Grass Valley, Thursday, 29 October

Overcast. High 46°, low 30°.

Pressure30.12 inHg
Wind2.8 mph N
Humidity69%
Visibility—
Dew point30°
Fri, 3045° / 29°0Overcast
45 °Overcast

Grass Valley, Friday, 30 October

Overcast. High 45°, low 29°.

Pressure30.03 inHg
Wind1.7 mph S
Humidity75%
Visibility—
Dew point30°
Sat, 3155° / 34°0Overcast
55 °Overcast

Grass Valley, Saturday, 31 October

Overcast. High 55°, low 34°.

Pressure30.00 inHg
Wind8.5 mph W
Humidity57%
Visibility—
Dew point32°
Sun, 0153° / 32°0Overcast
53 °Overcast

Grass Valley, Sunday, 1 November

Overcast. High 53°, low 32°.

Pressure29.77 inHg
Wind4.2 mph N
Humidity48%
Visibility—
Dew point27°
Mon, 0251° / 32°0Overcast
51 °Overcast

Grass Valley, Monday, 2 November

Overcast. High 51°, low 32°.

Pressure30.12 inHg
Wind10.2 mph W
Humidity48%
Visibility—
Dew point26°
Tue, 0350° / 30°0Overcast
50 °Overcast

Grass Valley, Tuesday, 3 November

Overcast. High 50°, low 30°.

Pressure30.09 inHg
Wind3.6 mph W
Humidity43%
Visibility—
Dew point21°
Wed, 0452° / 35°0Overcast
52 °Overcast

Grass Valley, Wednesday, 4 November

Overcast. High 52°, low 35°.

Pressure30.00 inHg
Wind4.2 mph NW
Humidity59%
Visibility—
Dew point33°
Thu, 0559° / 37°0Overcast
59 °Overcast

Grass Valley, Thursday, 5 November

Overcast. High 59°, low 37°.

Pressure29.88 inHg
Wind4 mph SE
Humidity51%
Visibility—
Dew point31°
Fri, 0666° / 45°0Overcast
66 °Overcast

Grass Valley, Friday, 6 November

Overcast. High 66°, low 45°.

Pressure29.71 inHg
Wind4.2 mph SE
Humidity55%
Visibility—
Dew point38°
Sat, 0747° / 40°0.37Rain
47 °Rain

Grass Valley, Saturday, 7 November

Rain. High 47°, low 40°.

Pressure29.62 inHg
Wind5.8 mph W
Humidity87%
Visibility—
Dew point40°
Sun, 0851° / 38°0.09Light rain
51 °Light rain

Grass Valley, Sunday, 8 November

Light rain. High 51°, low 38°.

Pressure29.94 inHg
Wind7.9 mph W
Humidity72%
Visibility—
Dew point36°
Mon, 0947° / 32°0.02Light snow
47 °Light snow

Grass Valley, Monday, 9 November

Light snow. High 47°, low 32°.

Pressure30.45 inHg
Wind13.4 mph W
Humidity58%
Visibility—
Dew point28°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 1037° / 23°0.06Climate normal
37 °Climate normal

Grass Valley, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high37°
Average low23°
Average precipitation0.06 in
Chance of precipitation40%
Record high55° (2016)
Record low-19° (1986)
Wed, 1137° / 21°0.07Climate normal
37 °Climate normal

Grass Valley, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high37°
Average low21°
Average precipitation0.07 in
Chance of precipitation35%
Record high56° (2016)
Record low-7° (2000)
Thu, 1237° / 23°0.08Climate normal
37 °Climate normal

Grass Valley, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high37°
Average low23°
Average precipitation0.08 in
Chance of precipitation43%
Record high58° (1999)
Record low-9° (1986)
Fri, 1337° / 24°0.09Climate normal
37 °Climate normal

Grass Valley, Friday, 13 November

Climate normal for this date — 60-year average.

Average high37°
Average low24°
Average precipitation0.09 in
Chance of precipitation45%
Record high55° (2025)
Record low1° (2000)
Sat, 1437° / 23°0.08Climate normal
37 °Climate normal

Grass Valley, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high37°
Average low23°
Average precipitation0.08 in
Chance of precipitation40%
Record high54° (1999)
Record low-2° (2000)
Sun, 1537° / 22°0.03Climate normal
37 °Climate normal

Grass Valley, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high37°
Average low22°
Average precipitation0.03 in
Chance of precipitation17%
Record high54° (2021)
Record low0° (2014)
Mon, 1636° / 23°0.08Climate normal
36 °Climate normal

Grass Valley, Monday, 16 November

Climate normal for this date — 60-year average.

Average high36°
Average low23°
Average precipitation0.08 in
Chance of precipitation45%
Record high52° (2025)
Record low-1° (1961)
Tue, 1735° / 22°0.07Climate normal
35 °Climate normal

Grass Valley, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high35°
Average low22°
Average precipitation0.07 in
Chance of precipitation48%
Record high52° (1976)
Record low-7° (1968)
Wed, 1835° / 21°0.09Climate normal
35 °Climate normal

Grass Valley, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high35°
Average low21°
Average precipitation0.09 in
Chance of precipitation47%
Record high53° (2008)
Record low-3° (2022)
Thu, 1934° / 21°0.07Climate normal
34 °Climate normal

Grass Valley, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high34°
Average low21°
Average precipitation0.07 in
Chance of precipitation38%
Record high47° (1989)
Record low-3° (1975)
Fri, 2034° / 21°0.07Climate normal
34 °Climate normal

Grass Valley, Friday, 20 November

Climate normal for this date — 60-year average.

Average high34°
Average low21°
Average precipitation0.07 in
Chance of precipitation43%
Record high46° (2002)
Record low-14° (1977)
Sat, 2133° / 19°0.07Climate normal
33 °Climate normal

Grass Valley, Saturday, 21 November

Climate normal for this date — 60-year average.

Average high33°
Average low19°
Average precipitation0.07 in
Chance of precipitation43%
Record high45° (2002)
Record low-15° (1977)
Sun, 2232° / 19°0.07Climate normal
32 °Climate normal

Grass Valley, Sunday, 22 November

Climate normal for this date — 60-year average.

Average high32°
Average low19°
Average precipitation0.07 in
Chance of precipitation43%
Record high47° (2002)
Record low-22° (1970)
Mon, 2332° / 18°0.07Climate normal
32 °Climate normal

Grass Valley, Monday, 23 November

Climate normal for this date — 60-year average.

Average high32°
Average low18°
Average precipitation0.07 in
Chance of precipitation45%
Record high46° (2017)
Record low-22° (1985)

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.