Monthly outlook for Mount Jackson, CA: average high 77.3°, average low 51°. That is 3.3° above the climate normal for October. Precipitation is expected on 3 days (about 0.4 inches), against a normal of 2 days and 1.1 inches. The warmest day looks like 16 October (92.2°), the coolest 22 October (46.1°).
77.3°/51°
Average high / low
+3.3°
Above normal
3 / 2
Wet days / normal
0.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 October – 24 October
79°
72.7°
+3.5°
25 October – 3 November
74.4°
68.8°
+3.1°
4 November – 13 November
at normal
64.6°
—
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).
Fri, 1692° / 50°0
92 °
Mount Jackson, Friday, 16 October
Clear. High 92°, low 50°.
Pressure30.09 inHg
Wind1.9 mph SE
Humidity12%
Visibility6.2 mi
Dew point26°
Sat, 1791° / 51°0
91 °
Mount Jackson, Saturday, 17 October
Clear. High 91°, low 51°.
Pressure30.06 inHg
Wind2.6 mph SE
Humidity13%
Visibility6.2 mi
Dew point30°
Sun, 1879° / 54°0
79 °
Mount Jackson, Sunday, 18 October
Clear. High 79°, low 54°.
Pressure29.97 inHg
Wind2.7 mph SE
Humidity36%
Visibility6.2 mi
Dew point47°
Mon, 1970° / 52°0
70 °
Mount Jackson, Monday, 19 October
Partly cloudy. High 70°, low 52°.
Pressure29.94 inHg
Wind9.4 mph NW
Humidity32%
Visibility6.2 mi
Dew point36°
Tue, 2068° / 50°0.05
68 °
Mount Jackson, Tuesday, 20 October
Light rain. High 68°, low 50°.
Pressure29.83 inHg
Wind6 mph SW
Humidity65%
Visibility—
Dew point47°
Wed, 2170° / 49°0
70 °
Mount Jackson, Wednesday, 21 October
Overcast. High 70°, low 49°.
Pressure29.88 inHg
Wind8 mph SW
Humidity56%
Visibility—
Dew point46°
Thu, 2271° / 46°0
71 °
Mount Jackson, Thursday, 22 October
Partly cloudy. High 71°, low 46°.
Pressure30.03 inHg
Wind5.6 mph S
Humidity53%
Visibility—
Dew point44°
Fri, 2379° / 48°0
79 °
Mount Jackson, Friday, 23 October
Clear. High 79°, low 48°.
Pressure30.18 inHg
Wind6.6 mph SW
Humidity39%
Visibility—
Dew point42°
Sat, 2483° / 52°0
83 °
Mount Jackson, Saturday, 24 October
Clear. High 83°, low 52°.
Pressure30.18 inHg
Wind6.1 mph SW
Humidity15%
Visibility—
Dew point22°
Sun, 2584° / 53°0
84 °
Mount Jackson, Sunday, 25 October
Clear. High 84°, low 53°.
Pressure30.21 inHg
Wind5.4 mph SW
Humidity10%
Visibility—
Dew point13°
Mon, 2681° / 53°0
81 °
Mount Jackson, Monday, 26 October
Overcast. High 81°, low 53°.
Pressure29.97 inHg
Wind5.9 mph S
Humidity18%
Visibility—
Dew point25°
Tue, 2782° / 54°0
82 °
Mount Jackson, Tuesday, 27 October
Mostly clear. High 82°, low 54°.
Pressure29.80 inHg
Wind7.2 mph SW
Humidity14%
Visibility—
Dew point20°
Wed, 2868° / 55°0.19
68 °
Mount Jackson, Wednesday, 28 October
Rain. High 68°, low 55°.
Pressure30.00 inHg
Wind9 mph S
Humidity71%
Visibility—
Dew point52°
Thu, 2962° / 50°0.19
62 °
Mount Jackson, Thursday, 29 October
Light rain. High 62°, low 50°.
Pressure30.03 inHg
Wind7 mph SW
Humidity83%
Visibility—
Dew point54°
Fri, 3069° / 50°0
69 °
Mount Jackson, Friday, 30 October
Overcast. High 69°, low 50°.
Pressure30.18 inHg
Wind6 mph SW
Humidity56%
Visibility—
Dew point46°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3169° / 48°0.05
69 °
Mount Jackson, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high69°
Average low48°
Average precipitation0.05 in
Chance of precipitation20%
Record high87° (1966)
Record low38° (2019)
Sun, 0169° / 48°0.07
69 °
Mount Jackson, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high69°
Average low48°
Average precipitation0.07 in
Chance of precipitation17%
Record high86° (2020)
Record low36° (2003)
Mon, 0269° / 48°0.06
69 °
Mount Jackson, Monday, 2 November
Climate normal for this date — 60-year average.
Average high69°
Average low48°
Average precipitation0.06 in
Chance of precipitation17%
Record high84° (2018)
Record low40° (2019)
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)
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.