Monthly outlook for Demuth, CA: average high 63.6°, average low 38.8°. That is 0.2° below the climate normal for October. Precipitation is expected on 1 day (about 0.2 inches), against a normal of 2 days and 0.6 inches. The warmest day looks like 8 October (85.1°), the coolest 15 October (26.9°).
63.6°/38.8°
Average high / low
−0.2°
Below normal
1 / 2
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
60.4°
65.2°
-2.7°
18 October – 27 October
69°
60.6°
+4.7°
28 October – 6 November
at normal
54.9°
—
October records over 66 years
88.9°1 October 2020All-time high
15.3°17 October 1962All-time low
Fri, 0979° / 47°0
79 °
Demuth, Friday, 9 October
Clear. High 79°, low 47°.
Pressure29.74 inHg
Wind7.2 mph SW
Humidity18%
Visibility6.2 mi
Dew point32°
Sat, 1059° / 40°0
59 °
Demuth, Saturday, 10 October
Light rain. High 59°, low 40°.
Pressure29.62 inHg
Wind10 mph N
Humidity42%
Visibility6.2 mi
Dew point34°
Sun, 1151° / 36°0.03
51 °
Demuth, Sunday, 11 October
Light rain. High 51°, low 36°.
Pressure29.65 inHg
Wind15.2 mph N
Humidity54%
Visibility6.2 mi
Dew point27°
Mon, 1255° / 37°0.13
55 °
Demuth, Monday, 12 October
Light rain. High 55°, low 37°.
Pressure29.83 inHg
Wind8.1 mph N
Humidity47%
Visibility6.2 mi
Dew point28°
Tue, 1362° / 32°0
62 °
Demuth, Tuesday, 13 October
Clear. High 62°, low 32°.
Pressure30.06 inHg
Wind3.4 mph SE
Humidity58%
Visibility—
Dew point34°
Wed, 1458° / 32°0
58 °
Demuth, Wednesday, 14 October
Clear. High 58°, low 32°.
Pressure30.09 inHg
Wind13.8 mph N
Humidity43%
Visibility—
Dew point32°
Thu, 1553° / 27°0
53 °
Demuth, Thursday, 15 October
Clear. High 53°, low 27°.
Pressure30.24 inHg
Wind17.5 mph NE
Humidity40%
Visibility—
Dew point20°
Fri, 1657° / 32°0
57 °
Demuth, Friday, 16 October
Clear. High 57°, low 32°.
Pressure30.06 inHg
Wind22.9 mph NE
Humidity29%
Visibility—
Dew point17°
Sat, 1744° / 41°0.02
44 °
Demuth, Saturday, 17 October
Light rain. High 44°, low 41°.
Pressure30.06 inHg
Wind13.3 mph NE
Humidity82%
Visibility—
Dew point37°
Sun, 1858° / 39°0.01
58 °
Demuth, Sunday, 18 October
Light rain. High 58°, low 39°.
Pressure30.15 inHg
Wind6.4 mph N
Humidity56%
Visibility—
Dew point34°
Mon, 1968° / 37°0
68 °
Demuth, Monday, 19 October
Clear. High 68°, low 37°.
Pressure30.15 inHg
Wind4.6 mph NE
Humidity39%
Visibility—
Dew point32°
Tue, 2072° / 41°0
72 °
Demuth, Tuesday, 20 October
Clear. High 72°, low 41°.
Pressure30.09 inHg
Wind5.2 mph SW
Humidity28%
Visibility—
Dew point27°
Wed, 2172° / 42°0
72 °
Demuth, Wednesday, 21 October
Mostly clear. High 72°, low 42°.
Pressure30.06 inHg
Wind5.8 mph SW
Humidity25%
Visibility—
Dew point26°
Thu, 2272° / 45°0
72 °
Demuth, Thursday, 22 October
Overcast. High 72°, low 45°.
Pressure30.03 inHg
Wind7.2 mph W
Humidity25%
Visibility—
Dew point27°
Fri, 2372° / 44°0
72 °
Demuth, Friday, 23 October
Clear. High 72°, low 44°.
Pressure30.00 inHg
Wind3.9 mph N
Humidity23%
Visibility—
Dew point25°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2460° / 38°0.08
60 °
Demuth, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high60°
Average low38°
Average precipitation0.08 in
Chance of precipitation17%
Record high75° (1988)
Record low27° (1971)
Sun, 2558° / 38°0.11
58 °
Demuth, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high58°
Average low38°
Average precipitation0.11 in
Chance of precipitation28%
Record high77° (1988)
Record low26° (1996)
Mon, 2658° / 37°0.07
58 °
Demuth, Monday, 26 October
Climate normal for this date — 60-year average.
Average high58°
Average low37°
Average precipitation0.07 in
Chance of precipitation20%
Record high77° (2008)
Record low26° (2023)
Tue, 2757° / 36°0.03
57 °
Demuth, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high57°
Average low36°
Average precipitation0.03 in
Chance of precipitation20%
Record high76° (2003)
Record low24° (2004)
Wed, 2856° / 36°0.08
56 °
Demuth, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high56°
Average low36°
Average precipitation0.08 in
Chance of precipitation32%
Record high76° (2017)
Record low22° (1971)
Thu, 2955° / 35°0.05
55 °
Demuth, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high55°
Average low35°
Average precipitation0.05 in
Chance of precipitation23%
Record high75° (2020)
Record low20° (1971)
Fri, 3055° / 35°0.06
55 °
Demuth, Friday, 30 October
Climate normal for this date — 60-year average.
Average high55°
Average low35°
Average precipitation0.06 in
Chance of precipitation20%
Record high71° (1966)
Record low23° (1991)
Sat, 3156° / 35°0.04
56 °
Demuth, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high56°
Average low35°
Average precipitation0.04 in
Chance of precipitation18%
Record high71° (1966)
Record low25° (2019)
Sun, 0156° / 35°0.06
56 °
Demuth, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high56°
Average low35°
Average precipitation0.06 in
Chance of precipitation25%
Record high75° (2020)
Record low25° (2002)
Mon, 0255° / 34°0.07
55 °
Demuth, Monday, 2 November
Climate normal for this date — 60-year average.
Average high55°
Average low34°
Average precipitation0.07 in
Chance of precipitation25%
Record high74° (2020)
Record low24° (1994)
Tue, 0356° / 34°0.05
56 °
Demuth, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high56°
Average low34°
Average precipitation0.05 in
Chance of precipitation22%
Record high72° (1976)
Record low18° (2022)
Wed, 0455° / 35°0.06
55 °
Demuth, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high55°
Average low35°
Average precipitation0.06 in
Chance of precipitation23%
Record high72° (1976)
Record low26° (2002)
Thu, 0553° / 35°0.09
53 °
Demuth, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low35°
Average precipitation0.09 in
Chance of precipitation30%
Record high73° (2020)
Record low23° (2004)
Fri, 0652° / 35°0.09
52 °
Demuth, Friday, 6 November
Climate normal for this date — 60-year average.
Average high52°
Average low35°
Average precipitation0.09 in
Chance of precipitation37%
Record high69° (2012)
Record low24° (1971)
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 Demuth, 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 Demuth, 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.