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
Period
Forecast high
Normal
Difference
25 October – 3 November
48.6°
43°
+3.1°
4 November – 13 November
53.7°
38.3°
+8.5°
14 November – 23 November
at normal
34.5°
—
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°0.12
50 °
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°0.15
44 °
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°0.16
40 °
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°0
46 °
Grass Valley, Thursday, 29 October
Overcast. High 46°, low 30°.
Pressure30.12 inHg
Wind2.8 mph N
Humidity69%
Visibility—
Dew point30°
Fri, 3045° / 29°0
45 °
Grass Valley, Friday, 30 October
Overcast. High 45°, low 29°.
Pressure30.03 inHg
Wind1.7 mph S
Humidity75%
Visibility—
Dew point30°
Sat, 3155° / 34°0
55 °
Grass Valley, Saturday, 31 October
Overcast. High 55°, low 34°.
Pressure30.00 inHg
Wind8.5 mph W
Humidity57%
Visibility—
Dew point32°
Sun, 0153° / 32°0
53 °
Grass Valley, Sunday, 1 November
Overcast. High 53°, low 32°.
Pressure29.77 inHg
Wind4.2 mph N
Humidity48%
Visibility—
Dew point27°
Mon, 0251° / 32°0
51 °
Grass Valley, Monday, 2 November
Overcast. High 51°, low 32°.
Pressure30.12 inHg
Wind10.2 mph W
Humidity48%
Visibility—
Dew point26°
Tue, 0350° / 30°0
50 °
Grass Valley, Tuesday, 3 November
Overcast. High 50°, low 30°.
Pressure30.09 inHg
Wind3.6 mph W
Humidity43%
Visibility—
Dew point21°
Wed, 0452° / 35°0
52 °
Grass Valley, Wednesday, 4 November
Overcast. High 52°, low 35°.
Pressure30.00 inHg
Wind4.2 mph NW
Humidity59%
Visibility—
Dew point33°
Thu, 0559° / 37°0
59 °
Grass Valley, Thursday, 5 November
Overcast. High 59°, low 37°.
Pressure29.88 inHg
Wind4 mph SE
Humidity51%
Visibility—
Dew point31°
Fri, 0666° / 45°0
66 °
Grass Valley, Friday, 6 November
Overcast. High 66°, low 45°.
Pressure29.71 inHg
Wind4.2 mph SE
Humidity55%
Visibility—
Dew point38°
Sat, 0747° / 40°0.37
47 °
Grass Valley, Saturday, 7 November
Rain. High 47°, low 40°.
Pressure29.62 inHg
Wind5.8 mph W
Humidity87%
Visibility—
Dew point40°
Sun, 0851° / 38°0.09
51 °
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°0.02
47 °
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°0.06
37 °
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°0.07
37 °
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°0.08
37 °
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°0.09
37 °
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°0.08
37 °
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°0.03
37 °
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°0.08
36 °
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°0.07
35 °
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°0.09
35 °
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°0.07
34 °
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°0.07
34 °
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°0.07
33 °
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°0.07
32 °
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°0.07
32 °
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.