Monthly outlook for Mount Jackson, CA: average high 75.8°, average low 51.3°. That is 3.1° above the climate normal for October. Precipitation is expected on 2 days (about 0.2 inches), against a normal of 2 days and 1.2 inches. The warmest day looks like 25 October (85.5°), the coolest 19 October (40°).
75.8°/51.3°
Average high / low
+3.1°
Above normal
2 / 2
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
18 October – 27 October
75.4°
71.4°
+2.2°
28 October – 6 November
76.4°
67.7°
+4.8°
7 November – 16 November
at normal
63.4°
—
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).
Mon, 1967° / 40°0.12
67 °
Mount Jackson, Monday, 19 October
Rain. High 67°, low 40°.
Pressure29.94 inHg
Wind3.8 mph W
Humidity40%
Visibility6.2 mi
Dew point40°
Tue, 2067° / 46°0
67 °
Mount Jackson, Tuesday, 20 October
Partly cloudy. High 67°, low 46°.
Pressure29.91 inHg
Wind0.6 mph SW
Humidity62%
Visibility6.2 mi
Dew point45°
Wed, 2165° / 51°0.05
65 °
Mount Jackson, Wednesday, 21 October
Light rain. High 65°, low 51°.
Pressure29.91 inHg
Wind1.5 mph S
Humidity72%
Visibility6.2 mi
Dew point52°
Thu, 2273° / 50°0
73 °
Mount Jackson, Thursday, 22 October
Mostly clear. High 73°, low 50°.
Pressure29.97 inHg
Wind8.9 mph NW
Humidity50%
Visibility—
Dew point44°
Fri, 2375° / 49°0
75 °
Mount Jackson, Friday, 23 October
Clear. High 75°, low 49°.
Pressure30.09 inHg
Wind9.1 mph NW
Humidity47%
Visibility—
Dew point44°
Sat, 2484° / 54°0
84 °
Mount Jackson, Saturday, 24 October
Clear. High 84°, low 54°.
Pressure30.12 inHg
Wind4.7 mph SW
Humidity21%
Visibility—
Dew point29°
Sun, 2585° / 56°0
85 °
Mount Jackson, Sunday, 25 October
Clear. High 85°, low 56°.
Pressure30.00 inHg
Wind5.7 mph SW
Humidity19%
Visibility—
Dew point29°
Mon, 2684° / 56°0
84 °
Mount Jackson, Monday, 26 October
Overcast. High 84°, low 56°.
Pressure29.88 inHg
Wind4.4 mph SW
Humidity19%
Visibility—
Dew point28°
Tue, 2776° / 55°0
76 °
Mount Jackson, Tuesday, 27 October
Overcast. High 76°, low 55°.
Pressure29.94 inHg
Wind5 mph SW
Humidity24%
Visibility—
Dew point31°
Wed, 2878° / 51°0
78 °
Mount Jackson, Wednesday, 28 October
Mostly clear. High 78°, low 51°.
Pressure30.06 inHg
Wind6.3 mph S
Humidity28%
Visibility—
Dew point33°
Thu, 2977° / 51°0
77 °
Mount Jackson, Thursday, 29 October
Overcast. High 77°, low 51°.
Pressure30.00 inHg
Wind5.2 mph S
Humidity29%
Visibility—
Dew point33°
Fri, 3082° / 52°0
82 °
Mount Jackson, Friday, 30 October
Clear. High 82°, low 52°.
Pressure29.91 inHg
Wind6 mph S
Humidity28%
Visibility—
Dew point35°
Sat, 3182° / 54°0
82 °
Mount Jackson, Saturday, 31 October
Clear. High 82°, low 54°.
Pressure29.94 inHg
Wind5.1 mph S
Humidity27%
Visibility—
Dew point36°
Sun, 0171° / 55°0
71 °
Mount Jackson, Sunday, 1 November
Overcast. High 71°, low 55°.
Pressure30.03 inHg
Wind9.5 mph S
Humidity31%
Visibility—
Dew point37°
Mon, 0268° / 56°0.01
68 °
Mount Jackson, Monday, 2 November
Light rain. High 68°, low 56°.
Pressure30.12 inHg
Wind4.8 mph SW
Humidity82%
Visibility—
Dew point55°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0368° / 48°0.05
68 °
Mount Jackson, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high68°
Average low48°
Average precipitation0.05 in
Chance of precipitation15%
Record high83° (2018)
Record low36° (2022)
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)
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.