Monthly outlook for Castella, CA: average high 74.3°, average low 47.6°. That is 3.2° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 4 days and 2.1 inches. The warmest day looks like 25 October (84°), the coolest 13 October (34.1°).
74.3°/47.6°
Average high / low
+3.2°
Above normal
0 / 4
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
13 October – 22 October
71.5°
70.6°
+0.5°
23 October – 1 November
78.9°
64.2°
+8.2°
2 November – 11 November
at normal
59.1°
—
October records over 66 years
97.9°2 October 2020All-time high
25°27 October 2004All-time low
Climate normals and records are computed from the nearest reference point — Sweetbriar (1 mi).
Wed, 1481° / 43°0
81 °
Castella, Wednesday, 14 October
Clear. High 81°, low 43°.
Pressure30.18 inHg
Wind2.7 mph E
Humidity25%
Visibility6.2 mi
Dew point26°
Thu, 1577° / 52°0
77 °
Castella, Thursday, 15 October
Clear. High 77°, low 52°.
Pressure30.30 inHg
Wind6.6 mph E
Humidity25%
Visibility6.2 mi
Dew point30°
Fri, 1678° / 53°0
78 °
Castella, Friday, 16 October
Clear. High 78°, low 53°.
Pressure30.18 inHg
Wind3.9 mph E
Humidity22%
Visibility6.2 mi
Dew point25°
Sat, 1777° / 54°0
77 °
Castella, Saturday, 17 October
Clear. High 77°, low 54°.
Pressure30.12 inHg
Wind7.4 mph S
Humidity24%
Visibility—
Dew point31°
Sun, 1869° / 50°0
69 °
Castella, Sunday, 18 October
Partly cloudy. High 69°, low 50°.
Pressure30.00 inHg
Wind7.3 mph S
Humidity30%
Visibility—
Dew point31°
Mon, 1961° / 40°0
61 °
Castella, Monday, 19 October
Overcast. High 61°, low 40°.
Pressure29.91 inHg
Wind7.1 mph NW
Humidity45%
Visibility—
Dew point35°
Tue, 2058° / 38°0
58 °
Castella, Tuesday, 20 October
Clear. High 58°, low 38°.
Pressure30.00 inHg
Wind9.8 mph NW
Humidity40%
Visibility—
Dew point28°
Wed, 2170° / 41°0
70 °
Castella, Wednesday, 21 October
Mostly clear. High 70°, low 41°.
Pressure30.09 inHg
Wind8.2 mph NW
Humidity35%
Visibility—
Dew point30°
Thu, 2273° / 47°0
73 °
Castella, Thursday, 22 October
Clear. High 73°, low 47°.
Pressure30.15 inHg
Wind9.8 mph N
Humidity39%
Visibility—
Dew point40°
Fri, 2371° / 41°0
71 °
Castella, Friday, 23 October
Clear. High 71°, low 41°.
Pressure30.36 inHg
Wind9.4 mph N
Humidity18%
Visibility—
Dew point15°
Sat, 2479° / 48°0
79 °
Castella, Saturday, 24 October
Clear. High 79°, low 48°.
Pressure30.36 inHg
Wind7.7 mph N
Humidity8%
Visibility—
Dew point4°
Sun, 2584° / 58°0
84 °
Castella, Sunday, 25 October
Clear. High 84°, low 58°.
Pressure30.15 inHg
Wind7.9 mph N
Humidity13%
Visibility—
Dew point21°
Mon, 2682° / 56°0
82 °
Castella, Monday, 26 October
Partly cloudy. High 82°, low 56°.
Pressure29.94 inHg
Wind7.7 mph N
Humidity14%
Visibility—
Dew point22°
Tue, 2779° / 54°0
79 °
Castella, Tuesday, 27 October
Overcast. High 79°, low 54°.
Pressure30.00 inHg
Wind7.5 mph N
Humidity14%
Visibility—
Dew point20°
Wed, 2879° / 53°0
79 °
Castella, Wednesday, 28 October
Overcast. High 79°, low 53°.
Pressure30.06 inHg
Wind7.3 mph N
Humidity28%
Visibility—
Dew point34°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 2962° / 44°0.18
62 °
Castella, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high62°
Average low44°
Average precipitation0.18 in
Chance of precipitation32%
Record high85° (2020)
Record low30° (1971)
Fri, 3062° / 45°0.17
62 °
Castella, Friday, 30 October
Climate normal for this date — 60-year average.
Average high62°
Average low45°
Average precipitation0.17 in
Chance of precipitation28%
Record high82° (1966)
Record low33° (1972)
Sat, 3163° / 44°0.15
63 °
Castella, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high63°
Average low44°
Average precipitation0.15 in
Chance of precipitation25%
Record high82° (1966)
Record low35° (1971)
Sun, 0163° / 45°0.15
63 °
Castella, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high63°
Average low45°
Average precipitation0.15 in
Chance of precipitation27%
Record high83° (1966)
Record low34° (2003)
Mon, 0263° / 44°0.14
63 °
Castella, Monday, 2 November
Climate normal for this date — 60-year average.
Average high63°
Average low44°
Average precipitation0.14 in
Chance of precipitation28%
Record high82° (2020)
Record low34° (1994)
Tue, 0363° / 45°0.14
63 °
Castella, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high63°
Average low45°
Average precipitation0.14 in
Chance of precipitation23%
Record high80° (1976)
Record low32° (1994)
Wed, 0462° / 45°0.13
62 °
Castella, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high62°
Average low45°
Average precipitation0.13 in
Chance of precipitation27%
Record high79° (1976)
Record low33° (2011)
Thu, 0560° / 45°0.24
60 °
Castella, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high60°
Average low45°
Average precipitation0.24 in
Chance of precipitation32%
Record high82° (2020)
Record low34° (2017)
Fri, 0658° / 44°0.22
58 °
Castella, Friday, 6 November
Climate normal for this date — 60-year average.
Average high58°
Average low44°
Average precipitation0.22 in
Chance of precipitation43%
Record high78° (2019)
Record low36° (1996)
Sat, 0759° / 43°0.26
59 °
Castella, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high59°
Average low43°
Average precipitation0.26 in
Chance of precipitation38%
Record high78° (1991)
Record low30° (2011)
Sun, 0857° / 42°0.22
57 °
Castella, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high57°
Average low42°
Average precipitation0.22 in
Chance of precipitation35%
Record high76° (2019)
Record low20° (1994)
Mon, 0956° / 41°0.25
56 °
Castella, Monday, 9 November
Climate normal for this date — 60-year average.
Average high56°
Average low41°
Average precipitation0.25 in
Chance of precipitation42%
Record high76° (2019)
Record low19° (1998)
Tue, 1056° / 41°0.22
56 °
Castella, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high56°
Average low41°
Average precipitation0.22 in
Chance of precipitation35%
Record high76° (2019)
Record low23° (1985)
Wed, 1156° / 41°0.23
56 °
Castella, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high56°
Average low41°
Average precipitation0.23 in
Chance of precipitation38%
Record high74° (2019)
Record low10° (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 Castella, 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 Castella, 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.