Monthly outlook for Mount Jackson, CA: average high 80.3°, average low 51.6°. That is 4.2° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 2 days and 1.0 inches. The warmest day looks like 15 October (93.7°), the coolest 20 October (43.4°).
80.3°/51.6°
Average high / low
+4.2°
Above normal
0 / 2
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
12 October – 21 October
81.5°
73.9°
+4.2°
22 October – 31 October
78.3°
69.6°
+4.8°
1 November – 10 November
at normal
66.1°
—
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, 1379° / 45°0
79 °
Mount Jackson, Tuesday, 13 October
Clear. High 79°, low 45°.
Pressure30.09 inHg
Wind5.5 mph NE
Humidity20%
Visibility6.2 mi
Dew point25°
Wed, 1484° / 53°0
84 °
Mount Jackson, Wednesday, 14 October
Clear. High 84°, low 53°.
Pressure30.09 inHg
Wind2.8 mph SE
Humidity16%
Visibility6.2 mi
Dew point27°
Thu, 1594° / 57°0
94 °
Mount Jackson, Thursday, 15 October
Clear. High 94°, low 57°.
Pressure30.06 inHg
Wind1.7 mph NE
Humidity14%
Visibility6.2 mi
Dew point30°
Fri, 1693° / 60°0
93 °
Mount Jackson, Friday, 16 October
Clear. High 93°, low 60°.
Pressure30.00 inHg
Wind6.1 mph NW
Humidity14%
Visibility—
Dew point28°
Sat, 1787° / 55°0
87 °
Mount Jackson, Saturday, 17 October
Clear. High 87°, low 55°.
Pressure29.97 inHg
Wind6.4 mph SW
Humidity30%
Visibility—
Dew point40°
Sun, 1885° / 53°0
85 °
Mount Jackson, Sunday, 18 October
Clear. High 85°, low 53°.
Pressure30.00 inHg
Wind6.5 mph SW
Humidity21%
Visibility—
Dew point33°
Mon, 1974° / 48°0
74 °
Mount Jackson, Monday, 19 October
Partly cloudy. High 74°, low 48°.
Pressure30.06 inHg
Wind11 mph NW
Humidity43%
Visibility—
Dew point44°
Tue, 2073° / 43°0
73 °
Mount Jackson, Tuesday, 20 October
Clear. High 73°, low 43°.
Pressure30.09 inHg
Wind6.4 mph NW
Humidity33%
Visibility—
Dew point31°
Wed, 2182° / 50°0
82 °
Mount Jackson, Wednesday, 21 October
Clear. High 82°, low 50°.
Pressure30.09 inHg
Wind4.8 mph N
Humidity16%
Visibility—
Dew point22°
Thu, 2287° / 56°0
87 °
Mount Jackson, Thursday, 22 October
Clear. High 87°, low 56°.
Pressure30.03 inHg
Wind7 mph SW
Humidity20%
Visibility—
Dew point30°
Fri, 2381° / 55°0
81 °
Mount Jackson, Friday, 23 October
Overcast. High 81°, low 55°.
Pressure29.88 inHg
Wind5.1 mph SW
Humidity27%
Visibility—
Dew point35°
Sat, 2476° / 51°0
76 °
Mount Jackson, Saturday, 24 October
Clear. High 76°, low 51°.
Pressure29.80 inHg
Wind5.9 mph SW
Humidity40%
Visibility—
Dew point41°
Sun, 2576° / 54°0
76 °
Mount Jackson, Sunday, 25 October
Overcast. High 76°, low 54°.
Pressure29.85 inHg
Wind5.6 mph S
Humidity43%
Visibility—
Dew point42°
Mon, 2681° / 52°0
81 °
Mount Jackson, Monday, 26 October
Mostly clear. High 81°, low 52°.
Pressure29.80 inHg
Wind6.9 mph SW
Humidity26%
Visibility—
Dew point36°
Tue, 2768° / 50°0
68 °
Mount Jackson, Tuesday, 27 October
Partly cloudy. High 68°, low 50°.
Pressure29.83 inHg
Wind3.3 mph SE
Humidity38%
Visibility—
Dew point39°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 2868° / 49°0.09
68 °
Mount Jackson, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high68°
Average low49°
Average precipitation0.09 in
Chance of precipitation18%
Record high89° (2003)
Record low38° (2023)
Thu, 2968° / 49°0.08
68 °
Mount Jackson, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high68°
Average low49°
Average precipitation0.08 in
Chance of precipitation20%
Record high82° (1965)
Record low37° (1971)
Fri, 3068° / 49°0.07
68 °
Mount Jackson, Friday, 30 October
Climate normal for this date — 60-year average.
Average high68°
Average low49°
Average precipitation0.07 in
Chance of precipitation15%
Record high84° (1966)
Record low40° (2023)
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)
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.