Monthly outlook for Penn Valley, CA: average high 68.3°, average low 50.8°. That is 2.3° above the climate normal for October. Precipitation is expected on 1 day (about 0.8 inches), against a normal of 4 days and 2.4 inches. The warmest day looks like 25 October (74.5°), the coolest 28 October (45°).
68.3°/50.8°
Average high / low
+2.3°
Above normal
1 / 4
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
24 October – 2 November
67.5°
65.4°
+1.2°
3 November – 12 November
69.5°
60.7°
+4.9°
13 November – 22 November
at normal
56.7°
—
October records over 66 years
100°1 October 2024All-time high
30.9°29 October 1971All-time low
Climate normals and records are computed from the nearest reference point — Alta Sierra (9 mi).
Sun, 2575° / 50°0
75 °
Penn Valley, Sunday, 25 October
Overcast. High 75°, low 50°.
Pressure30.06 inHg
Wind5.8 mph W
Humidity40%
Visibility6.2 mi
Dew point43°
Mon, 2666° / 50°0
66 °
Penn Valley, Monday, 26 October
Clear. High 66°, low 50°.
Pressure30.12 inHg
Wind7.7 mph SW
Humidity46%
Visibility6.2 mi
Dew point42°
Tue, 2766° / 46°0
66 °
Penn Valley, Tuesday, 27 October
Mostly clear. High 66°, low 46°.
Pressure30.03 inHg
Wind4.9 mph W
Humidity36%
Visibility6.2 mi
Dew point36°
Wed, 2864° / 45°0
64 °
Penn Valley, Wednesday, 28 October
Overcast. High 64°, low 45°.
Pressure29.94 inHg
Wind6.8 mph NE
Humidity32%
Visibility—
Dew point29°
Thu, 2961° / 46°0
61 °
Penn Valley, Thursday, 29 October
Overcast. High 61°, low 46°.
Pressure29.88 inHg
Wind11.6 mph S
Humidity62%
Visibility—
Dew point45°
Fri, 3066° / 46°0
66 °
Penn Valley, Friday, 30 October
Clear. High 66°, low 46°.
Pressure29.94 inHg
Wind5.9 mph NE
Humidity32%
Visibility—
Dew point30°
Sat, 3168° / 47°0
68 °
Penn Valley, Saturday, 31 October
Overcast. High 68°, low 47°.
Pressure30.00 inHg
Wind5.5 mph NE
Humidity30%
Visibility—
Dew point30°
Sun, 0170° / 52°0
70 °
Penn Valley, Sunday, 1 November
Overcast. High 70°, low 52°.
Pressure29.97 inHg
Wind5.3 mph W
Humidity23%
Visibility—
Dew point26°
Mon, 0271° / 57°0
71 °
Penn Valley, Monday, 2 November
Overcast. High 71°, low 57°.
Pressure30.15 inHg
Wind6.4 mph W
Humidity30%
Visibility—
Dew point33°
Tue, 0373° / 56°0
73 °
Penn Valley, Tuesday, 3 November
Overcast. High 73°, low 56°.
Pressure30.21 inHg
Wind5.2 mph W
Humidity38%
Visibility—
Dew point41°
Wed, 0472° / 55°0
72 °
Penn Valley, Wednesday, 4 November
Overcast. High 72°, low 55°.
Pressure30.06 inHg
Wind4.9 mph E
Humidity44%
Visibility—
Dew point44°
Thu, 0571° / 54°0
71 °
Penn Valley, Thursday, 5 November
Overcast. High 71°, low 54°.
Pressure29.94 inHg
Wind6.1 mph SW
Humidity37%
Visibility—
Dew point39°
Fri, 0663° / 55°0.8
63 °
Penn Valley, Friday, 6 November
Rain. High 63°, low 55°.
Pressure29.97 inHg
Wind11.7 mph SE
Humidity92%
Visibility—
Dew point55°
Sat, 0766° / 53°0.01
66 °
Penn Valley, Saturday, 7 November
Light rain. High 66°, low 53°.
Pressure30.18 inHg
Wind5.7 mph SW
Humidity65%
Visibility—
Dew point50°
Sun, 0872° / 53°0
72 °
Penn Valley, Sunday, 8 November
Overcast. High 72°, low 53°.
Pressure30.21 inHg
Wind4.7 mph W
Humidity52%
Visibility—
Dew point46°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0959° / 42°0.17
59 °
Penn Valley, Monday, 9 November
Climate normal for this date — 60-year average.
Average high59°
Average low42°
Average precipitation0.17 in
Chance of precipitation35%
Record high79° (2025)
Record low29° (1982)
Tue, 1058° / 42°0.19
58 °
Penn Valley, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high58°
Average low42°
Average precipitation0.19 in
Chance of precipitation35%
Record high79° (2025)
Record low28° (2022)
Wed, 1159° / 42°0.21
59 °
Penn Valley, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high59°
Average low42°
Average precipitation0.21 in
Chance of precipitation28%
Record high74° (2025)
Record low27° (1982)
Thu, 1259° / 41°0.17
59 °
Penn Valley, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high59°
Average low41°
Average precipitation0.17 in
Chance of precipitation32%
Record high74° (2019)
Record low23° (1985)
Fri, 1358° / 41°0.26
58 °
Penn Valley, Friday, 13 November
Climate normal for this date — 60-year average.
Average high58°
Average low41°
Average precipitation0.26 in
Chance of precipitation32%
Record high73° (2021)
Record low12° (1985)
Sat, 1459° / 42°0.17
59 °
Penn Valley, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high59°
Average low42°
Average precipitation0.17 in
Chance of precipitation33%
Record high75° (2008)
Record low21° (1985)
Sun, 1558° / 41°0.13
58 °
Penn Valley, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high58°
Average low41°
Average precipitation0.13 in
Chance of precipitation27%
Record high73° (2008)
Record low24° (1985)
Mon, 1657° / 42°0.23
57 °
Penn Valley, Monday, 16 November
Climate normal for this date — 60-year average.
Average high57°
Average low42°
Average precipitation0.23 in
Chance of precipitation33%
Record high71° (2008)
Record low28° (2000)
Tue, 1757° / 41°0.28
57 °
Penn Valley, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high57°
Average low41°
Average precipitation0.28 in
Chance of precipitation37%
Record high73° (2019)
Record low30° (1964)
Wed, 1857° / 40°0.23
57 °
Penn Valley, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high57°
Average low40°
Average precipitation0.23 in
Chance of precipitation33%
Record high75° (2019)
Record low27° (1985)
Thu, 1956° / 40°0.18
56 °
Penn Valley, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high56°
Average low40°
Average precipitation0.18 in
Chance of precipitation37%
Record high70° (2018)
Record low26° (1985)
Fri, 2055° / 40°0.24
55 °
Penn Valley, Friday, 20 November
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.24 in
Chance of precipitation37%
Record high72° (1995)
Record low27° (1985)
Sat, 2155° / 40°0.29
55 °
Penn Valley, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.29 in
Chance of precipitation33%
Record high74° (2017)
Record low26° (1961)
Sun, 2255° / 39°0.24
55 °
Penn Valley, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high55°
Average low39°
Average precipitation0.24 in
Chance of precipitation33%
Record high77° (2017)
Record low28° (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 Penn 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 Penn 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.