Monthly outlook for Grass Valley, CA: average high 48.2°, average low 37°. That is 3.9° below the climate normal for November. Precipitation is expected on 10 days (about 9.3 inches), against a normal of 5 days and 3.5 inches. The warmest day looks like 30 November (54.9°), the coolest 23 November (30.7°).
48.2°/37°
Average high / low
−3.9°
Below normal
10 / 5
Wet days / normal
9.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 November – 24 November
46.4°
56.1°
-5.4°
25 November – 4 December
51.1°
53.6°
-1.4°
5 December – 14 December
at normal
51.6°
—
November records over 66 years
83.7°2 November 2020All-time high
12.2°13 November 1985All-time low
Climate normals and records are computed from the nearest reference point — Alta Sierra (7 mi).
Mon, 1649° / 40°0.72
49 °
Grass Valley, Monday, 16 November
Heavy rain. High 49°, low 40°.
Pressure30.09 inHg
Wind2 mph SW
Humidity60%
Visibility6.2 mi
Dew point37°
Tue, 1749° / 32°0
49 °
Grass Valley, Tuesday, 17 November
Light rain. High 49°, low 32°.
Pressure30.09 inHg
Wind4 mph SW
Humidity59%
Visibility6.0 mi
Dew point35°
Wed, 1844° / 37°1.01
44 °
Grass Valley, Wednesday, 18 November
Heavy rain. High 44°, low 37°.
Pressure30.00 inHg
Wind11 mph SE
Humidity98%
Visibility1.1 mi
Dew point37°
Thu, 1942° / 37°1.04
42 °
Grass Valley, Thursday, 19 November
Rain. High 42°, low 37°.
Pressure29.85 inHg
Wind4.1 mph E
Humidity97%
Visibility2.0 mi
Dew point40°
Fri, 2050° / 33°0.01
50 °
Grass Valley, Friday, 20 November
Light rain. High 50°, low 33°.
Pressure30.12 inHg
Wind7.7 mph SE
Humidity76%
Visibility—
Dew point37°
Sat, 2144° / 35°0.86
44 °
Grass Valley, Saturday, 21 November
Rain. High 44°, low 35°.
Pressure29.88 inHg
Wind15.5 mph S
Humidity65%
Visibility—
Dew point32°
Sun, 2242° / 31°0.13
42 °
Grass Valley, Sunday, 22 November
Light rain. High 42°, low 31°.
Pressure30.12 inHg
Wind6.3 mph E
Humidity91%
Visibility—
Dew point37°
Mon, 2343° / 31°0.31
43 °
Grass Valley, Monday, 23 November
Light rain. High 43°, low 31°.
Pressure30.27 inHg
Wind10.2 mph SE
Humidity92%
Visibility—
Dew point35°
Tue, 2447° / 42°3
47 °
Grass Valley, Tuesday, 24 November
Heavy rain. High 47°, low 42°.
Pressure29.85 inHg
Wind22 mph S
Humidity95%
Visibility—
Dew point45°
Wed, 2549° / 38°0.09
49 °
Grass Valley, Wednesday, 25 November
Light rain. High 49°, low 38°.
Pressure30.27 inHg
Wind5.8 mph S
Humidity75%
Visibility—
Dew point38°
Thu, 2654° / 42°0.01
54 °
Grass Valley, Thursday, 26 November
Light rain. High 54°, low 42°.
Pressure30.33 inHg
Wind5.4 mph E
Humidity65%
Visibility—
Dew point38°
Fri, 2745° / 43°1.24
45 °
Grass Valley, Friday, 27 November
Heavy rain. High 45°, low 43°.
Pressure29.97 inHg
Wind11.1 mph S
Humidity97%
Visibility—
Dew point44°
Sat, 2853° / 34°0.03
53 °
Grass Valley, Saturday, 28 November
Light rain. High 53°, low 34°.
Pressure30.12 inHg
Wind6.9 mph NE
Humidity73%
Visibility—
Dew point38°
Sun, 2951° / 34°0
51 °
Grass Valley, Sunday, 29 November
Mostly clear. High 51°, low 34°.
Pressure30.24 inHg
Wind6.4 mph NE
Humidity40%
Visibility—
Dew point23°
Mon, 3055° / 39°0
55 °
Grass Valley, Monday, 30 November
Overcast. High 55°, low 39°.
Pressure30.15 inHg
Wind6 mph E
Humidity45%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0153° / 38°0.32
53 °
Grass Valley, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.32 in
Chance of precipitation37%
Record high74° (2021)
Record low29° (2015)
Wed, 0253° / 38°0.3
53 °
Grass Valley, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.3 in
Chance of precipitation37%
Record high71° (2021)
Record low26° (1967)
Thu, 0354° / 38°0.31
54 °
Grass Valley, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high54°
Average low38°
Average precipitation0.31 in
Chance of precipitation38%
Record high65° (2021)
Record low30° (2018)
Fri, 0453° / 37°0.24
53 °
Grass Valley, Friday, 4 December
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.24 in
Chance of precipitation30%
Record high65° (2020)
Record low25° (1971)
Sat, 0553° / 38°0.22
53 °
Grass Valley, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.22 in
Chance of precipitation37%
Record high67° (2021)
Record low22° (1972)
Sun, 0652° / 38°0.2
52 °
Grass Valley, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.2 in
Chance of precipitation33%
Record high67° (1979)
Record low26° (1998)
Mon, 0752° / 37°0.29
52 °
Grass Valley, Monday, 7 December
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.29 in
Chance of precipitation40%
Record high69° (2017)
Record low23° (1998)
Tue, 0852° / 36°0.18
52 °
Grass Valley, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high52°
Average low36°
Average precipitation0.18 in
Chance of precipitation30%
Record high68° (2020)
Record low10° (1972)
Wed, 0953° / 37°0.24
53 °
Grass Valley, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.24 in
Chance of precipitation33%
Record high66° (2017)
Record low7° (1972)
Thu, 1053° / 37°0.31
53 °
Grass Valley, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.31 in
Chance of precipitation33%
Record high67° (2017)
Record low16° (1972)
Fri, 1151° / 37°0.23
51 °
Grass Valley, Friday, 11 December
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.23 in
Chance of precipitation37%
Record high68° (2025)
Record low16° (1972)
Sat, 1250° / 36°0.3
50 °
Grass Valley, Saturday, 12 December
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.3 in
Chance of precipitation38%
Record high68° (2025)
Record low7° (1972)
Sun, 1350° / 36°0.24
50 °
Grass Valley, Sunday, 13 December
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.24 in
Chance of precipitation45%
Record high69° (2025)
Record low20° (1972)
Mon, 1450° / 35°0.27
50 °
Grass Valley, Monday, 14 December
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.27 in
Chance of precipitation40%
Record high67° (2025)
Record low12° (1972)
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.