Monthly outlook for Grass Valley, OR: average high 58.6°, average low 42°. That is 2.2° above the climate normal for October. Precipitation is expected on 1 day (about 0.2 inches), against a normal of 5 days and 0.9 inches. The warmest day looks like 21 October (66.6°), the coolest 24 October (34.2°).
58.6°/42°
Average high / low
+2.2°
Above normal
1 / 5
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
59.1°
56.6°
+1.4°
29 October – 7 November
57.9°
51°
+3.9°
8 November – 17 November
at normal
47.4°
—
October records over 66 years
88°2 October 1975All-time high
17.4°30 October 2019All-time low
Tue, 2062° / 39°0
62 °
Grass Valley, Tuesday, 20 October
Overcast. High 62°, low 39°.
Pressure30.06 inHg
Wind7 mph E
Humidity37%
Visibility6.2 mi
Dew point29°
Wed, 2167° / 45°0
67 °
Grass Valley, Wednesday, 21 October
Overcast. High 67°, low 45°.
Pressure29.97 inHg
Wind2 mph S
Humidity33%
Visibility6.2 mi
Dew point33°
Thu, 2261° / 47°0.01
61 °
Grass Valley, Thursday, 22 October
Light rain. High 61°, low 47°.
Pressure29.85 inHg
Wind4.4 mph W
Humidity43%
Visibility6.2 mi
Dew point37°
Fri, 2353° / 39°0
53 °
Grass Valley, Friday, 23 October
Clear. High 53°, low 39°.
Pressure30.27 inHg
Wind13.6 mph NW
Humidity53%
Visibility—
Dew point30°
Sat, 2458° / 34°0
58 °
Grass Valley, Saturday, 24 October
Mostly clear. High 58°, low 34°.
Pressure30.15 inHg
Wind5.5 mph NE
Humidity49%
Visibility—
Dew point28°
Sun, 2564° / 40°0
64 °
Grass Valley, Sunday, 25 October
Mostly clear. High 64°, low 40°.
Pressure30.24 inHg
Wind4.1 mph NW
Humidity31%
Visibility—
Dew point22°
Mon, 2659° / 42°0
59 °
Grass Valley, Monday, 26 October
Overcast. High 59°, low 42°.
Pressure30.18 inHg
Wind12 mph E
Humidity30%
Visibility—
Dew point21°
Tue, 2755° / 41°0
55 °
Grass Valley, Tuesday, 27 October
Clear. High 55°, low 41°.
Pressure30.21 inHg
Wind14.2 mph E
Humidity36%
Visibility—
Dew point24°
Wed, 2854° / 42°0
54 °
Grass Valley, Wednesday, 28 October
Overcast. High 54°, low 42°.
Pressure30.09 inHg
Wind7.1 mph NE
Humidity38%
Visibility—
Dew point24°
Thu, 2958° / 38°0
58 °
Grass Valley, Thursday, 29 October
Partly cloudy. High 58°, low 38°.
Pressure29.97 inHg
Wind6 mph NE
Humidity35%
Visibility—
Dew point24°
Fri, 3058° / 44°0
58 °
Grass Valley, Friday, 30 October
Overcast. High 58°, low 44°.
Pressure29.85 inHg
Wind3.7 mph NW
Humidity34%
Visibility—
Dew point24°
Sat, 3160° / 47°0
60 °
Grass Valley, Saturday, 31 October
Overcast. High 60°, low 47°.
Pressure29.94 inHg
Wind6.8 mph N
Humidity37%
Visibility—
Dew point28°
Sun, 0154° / 42°0.14
54 °
Grass Valley, Sunday, 1 November
Light rain. High 54°, low 42°.
Pressure29.94 inHg
Wind11.3 mph NE
Humidity38%
Visibility—
Dew point26°
Mon, 0261° / 46°0
61 °
Grass Valley, Monday, 2 November
Overcast. High 61°, low 46°.
Pressure30.12 inHg
Wind7.2 mph NW
Humidity57%
Visibility—
Dew point39°
Tue, 0356° / 45°0
56 °
Grass Valley, Tuesday, 3 November
Overcast. High 56°, low 45°.
Pressure30.09 inHg
Wind6.4 mph NE
Humidity60%
Visibility—
Dew point38°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0452° / 38°0.09
52 °
Grass Valley, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.09 in
Chance of precipitation45%
Record high68° (2020)
Record low22° (2003)
Thu, 0551° / 37°0.07
51 °
Grass Valley, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.07 in
Chance of precipitation35%
Record high63° (1988)
Record low21° (1973)
Fri, 0650° / 37°0.09
50 °
Grass Valley, Friday, 6 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.09 in
Chance of precipitation43%
Record high66° (2012)
Record low23° (1973)
Sat, 0749° / 36°0.1
49 °
Grass Valley, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.1 in
Chance of precipitation40%
Record high67° (1978)
Record low25° (2017)
Sun, 0848° / 35°0.07
48 °
Grass Valley, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.07 in
Chance of precipitation32%
Record high60° (2016)
Record low25° (1994)
Mon, 0948° / 34°0.06
48 °
Grass Valley, Monday, 9 November
Climate normal for this date — 60-year average.
Average high48°
Average low34°
Average precipitation0.06 in
Chance of precipitation30%
Record high62° (1989)
Record low24° (2022)
Tue, 1048° / 35°0.07
48 °
Grass Valley, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.07 in
Chance of precipitation30%
Record high63° (1989)
Record low18° (1986)
Wed, 1148° / 35°0.08
48 °
Grass Valley, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.08 in
Chance of precipitation27%
Record high64° (1990)
Record low11° (1985)
Thu, 1248° / 35°0.07
48 °
Grass Valley, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.07 in
Chance of precipitation40%
Record high66° (1999)
Record low-4° (1985)
Fri, 1347° / 35°0.09
47 °
Grass Valley, Friday, 13 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.09 in
Chance of precipitation40%
Record high66° (1999)
Record low1° (1985)
Sat, 1446° / 35°0.04
46 °
Grass Valley, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.04 in
Chance of precipitation33%
Record high62° (2001)
Record low6° (2014)
Sun, 1547° / 34°0.06
47 °
Grass Valley, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.06 in
Chance of precipitation35%
Record high64° (2021)
Record low-6° (2014)
Mon, 1646° / 34°0.07
46 °
Grass Valley, Monday, 16 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.07 in
Chance of precipitation37%
Record high62° (1976)
Record low-1° (2014)
Tue, 1746° / 34°0.08
46 °
Grass Valley, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.08 in
Chance of precipitation48%
Record high65° (2019)
Record low6° (2014)
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, OR 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, OR 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.