Monthly outlook for Mount Jackson, CA: average high 71.5°, average low 52.5°. That is 0.9° above the climate normal for October. Precipitation is expected on 5 days (about 2.1 inches), against a normal of 3 days and 1.2 inches. The warmest day looks like 25 October (82.5°), the coolest 20 October (46°).
71.5°/52.5°
Average high / low
+0.9°
Above normal
5 / 3
Wet days / normal
2.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
75.1°
70.9°
+2.3°
29 October – 7 November
65.7°
67.5°
-1°
8 November – 17 November
at normal
63.1°
—
October records over 66 years
105.8°1 October 2020All-time high
36.7°27 October 2023All-time low
Climate normals and records are computed from the nearest reference point — Forestville (2 mi).
Tue, 2071° / 46°0.03
71 °
Mount Jackson, Tuesday, 20 October
Light rain. High 71°, low 46°.
Pressure29.94 inHg
Wind2.4 mph E
Humidity47%
Visibility6.2 mi
Dew point41°
Wed, 2172° / 52°0.01
72 °
Mount Jackson, Wednesday, 21 October
Light rain. High 72°, low 52°.
Pressure29.85 inHg
Wind1.5 mph E
Humidity38%
Visibility6.2 mi
Dew point44°
Thu, 2269° / 51°0.11
69 °
Mount Jackson, Thursday, 22 October
Rain. High 69°, low 51°.
Pressure29.94 inHg
Wind1.4 mph S
Humidity78%
Visibility6.2 mi
Dew point54°
Fri, 2372° / 47°0
72 °
Mount Jackson, Friday, 23 October
Clear. High 72°, low 47°.
Pressure30.12 inHg
Wind1.8 mph N
Humidity44%
Visibility6.2 mi
Dew point44°
Sat, 2473° / 47°0
73 °
Mount Jackson, Saturday, 24 October
Partly cloudy. High 73°, low 47°.
Pressure30.03 inHg
Wind5.8 mph SW
Humidity34%
Visibility—
Dew point34°
Sun, 2582° / 51°0
82 °
Mount Jackson, Sunday, 25 October
Partly cloudy. High 82°, low 51°.
Pressure30.12 inHg
Wind4.6 mph SW
Humidity25%
Visibility—
Dew point32°
Mon, 2682° / 56°0
82 °
Mount Jackson, Monday, 26 October
Overcast. High 82°, low 56°.
Pressure30.06 inHg
Wind4 mph SW
Humidity28%
Visibility—
Dew point37°
Tue, 2782° / 56°0
82 °
Mount Jackson, Tuesday, 27 October
Overcast. High 82°, low 56°.
Pressure30.03 inHg
Wind4.3 mph SW
Humidity25%
Visibility—
Dew point34°
Wed, 2882° / 56°0
82 °
Mount Jackson, Wednesday, 28 October
Overcast. High 82°, low 56°.
Pressure29.94 inHg
Wind4.9 mph SW
Humidity25%
Visibility—
Dew point33°
Thu, 2971° / 53°0
71 °
Mount Jackson, Thursday, 29 October
Overcast. High 71°, low 53°.
Pressure29.91 inHg
Wind3.8 mph SW
Humidity27%
Visibility—
Dew point33°
Fri, 3064° / 52°0.33
64 °
Mount Jackson, Friday, 30 October
Rain. High 64°, low 52°.
Pressure29.97 inHg
Wind2.8 mph NE
Humidity39%
Visibility—
Dew point36°
Sat, 3171° / 53°0.04
71 °
Mount Jackson, Saturday, 31 October
Light rain. High 71°, low 53°.
Pressure30.09 inHg
Wind3.3 mph SE
Humidity63%
Visibility—
Dew point49°
Sun, 0160° / 56°0.85
60 °
Mount Jackson, Sunday, 1 November
Heavy rain. High 60°, low 56°.
Pressure30.03 inHg
Wind3.3 mph E
Humidity70%
Visibility—
Dew point50°
Mon, 0265° / 59°0.7
65 °
Mount Jackson, Monday, 2 November
Rain. High 65°, low 59°.
Pressure29.85 inHg
Wind14.6 mph S
Humidity93%
Visibility—
Dew point60°
Tue, 0362° / 55°0.02
62 °
Mount Jackson, Tuesday, 3 November
Light rain. High 62°, low 55°.
Pressure30.00 inHg
Wind6.1 mph SW
Humidity83%
Visibility—
Dew point54°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0468° / 48°0.04
68 °
Mount Jackson, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high68°
Average low48°
Average precipitation0.04 in
Chance of precipitation13%
Record high84° (1976)
Record low37° (2003)
Thu, 0566° / 49°0.13
66 °
Mount Jackson, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high66°
Average low49°
Average precipitation0.13 in
Chance of precipitation18%
Record high83° (2020)
Record low39° (2017)
Fri, 0665° / 49°0.08
65 °
Mount Jackson, Friday, 6 November
Climate normal for this date — 60-year average.
Average high65°
Average low49°
Average precipitation0.08 in
Chance of precipitation25%
Record high79° (1976)
Record low40° (1972)
Sat, 0765° / 48°0.15
65 °
Mount Jackson, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.15 in
Chance of precipitation23%
Record high80° (1991)
Record low38° (2017)
Sun, 0864° / 47°0.11
64 °
Mount Jackson, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high64°
Average low47°
Average precipitation0.11 in
Chance of precipitation25%
Record high78° (1976)
Record low38° (2021)
Mon, 0964° / 46°0.13
64 °
Mount Jackson, Monday, 9 November
Climate normal for this date — 60-year average.
Average high64°
Average low46°
Average precipitation0.13 in
Chance of precipitation27%
Record high80° (2025)
Record low35° (2020)
Tue, 1063° / 46°0.22
63 °
Mount Jackson, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high63°
Average low46°
Average precipitation0.22 in
Chance of precipitation30%
Record high79° (2025)
Record low35° (2018)
Wed, 1163° / 46°0.15
63 °
Mount Jackson, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high63°
Average low46°
Average precipitation0.15 in
Chance of precipitation28%
Record high80° (2019)
Record low34° (1978)
Thu, 1264° / 46°0.09
64 °
Mount Jackson, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high64°
Average low46°
Average precipitation0.09 in
Chance of precipitation22%
Record high77° (1990)
Record low31° (1985)
Fri, 1363° / 46°0.2
63 °
Mount Jackson, Friday, 13 November
Climate normal for this date — 60-year average.
Average high63°
Average low46°
Average precipitation0.2 in
Chance of precipitation32%
Record high77° (1995)
Record low31° (1985)
Sat, 1463° / 46°0.07
63 °
Mount Jackson, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high63°
Average low46°
Average precipitation0.07 in
Chance of precipitation23%
Record high81° (2008)
Record low33° (1985)
Sun, 1563° / 46°0.15
63 °
Mount Jackson, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high63°
Average low46°
Average precipitation0.15 in
Chance of precipitation25%
Record high80° (2008)
Record low34° (2000)
Mon, 1662° / 46°0.19
62 °
Mount Jackson, Monday, 16 November
Climate normal for this date — 60-year average.
Average high62°
Average low46°
Average precipitation0.19 in
Chance of precipitation30%
Record high77° (2008)
Record low34° (2024)
Tue, 1762° / 45°0.17
62 °
Mount Jackson, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high62°
Average low45°
Average precipitation0.17 in
Chance of precipitation28%
Record high78° (2019)
Record low33° (2000)
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 Mount Jackson, 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 Mount Jackson, 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.