Monthly outlook for Boonville, CA: average high 75.3°, average low 48.1°. That is 1.9° above the climate normal for October. Precipitation is expected on 1 day (about 0.2 inches), against a normal of 3 days and 1.6 inches. The warmest day looks like 16 October (91.4°), the coolest 29 October (41°).
75.3°/48.1°
Average high / low
+1.9°
Above normal
1 / 3
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
76.3°
73.6°
+1.5°
26 October – 4 November
73.5°
68.9°
+2.6°
5 November – 14 November
at normal
63.8°
—
October records over 66 years
102.9°1 October 2024All-time high
30.9°29 October 1971All-time low
Climate normals and records are computed from the nearest reference point — Ukiah (13 mi).
Sat, 1787° / 51°0
87 °
Boonville, Saturday, 17 October
Clear. High 87°, low 51°.
Pressure30.06 inHg
Wind3.4 mph NW
Humidity16%
Visibility6.2 mi
Dew point33°
Sun, 1867° / 51°0
67 °
Boonville, Sunday, 18 October
Partly cloudy. High 67°, low 51°.
Pressure30.00 inHg
Wind5.2 mph W
Humidity65%
Visibility6.2 mi
Dew point50°
Mon, 1963° / 49°0.03
63 °
Boonville, Monday, 19 October
Light rain. High 63°, low 49°.
Pressure29.94 inHg
Wind8.9 mph NW
Humidity53%
Visibility6.2 mi
Dew point40°
Tue, 2068° / 48°0.02
68 °
Boonville, Tuesday, 20 October
Light rain. High 68°, low 48°.
Pressure29.83 inHg
Wind5.9 mph NW
Humidity62%
Visibility—
Dew point47°
Wed, 2167° / 48°0
67 °
Boonville, Wednesday, 21 October
Overcast. High 67°, low 48°.
Pressure29.91 inHg
Wind4.4 mph W
Humidity49%
Visibility—
Dew point44°
Thu, 2279° / 50°0
79 °
Boonville, Thursday, 22 October
Overcast. High 79°, low 50°.
Pressure29.91 inHg
Wind5.6 mph W
Humidity24%
Visibility—
Dew point31°
Fri, 2381° / 45°0
81 °
Boonville, Friday, 23 October
Overcast. High 81°, low 45°.
Pressure30.00 inHg
Wind5.7 mph W
Humidity34%
Visibility—
Dew point37°
Sat, 2483° / 47°0
83 °
Boonville, Saturday, 24 October
Partly cloudy. High 83°, low 47°.
Pressure30.12 inHg
Wind6.8 mph NW
Humidity30%
Visibility—
Dew point38°
Sun, 2578° / 47°0
78 °
Boonville, Sunday, 25 October
Overcast. High 78°, low 47°.
Pressure30.15 inHg
Wind8.3 mph NW
Humidity6%
Visibility—
Dew point-1°
Mon, 2685° / 49°0
85 °
Boonville, Monday, 26 October
Overcast. High 85°, low 49°.
Pressure30.00 inHg
Wind5.8 mph W
Humidity21%
Visibility—
Dew point31°
Tue, 2772° / 54°0
72 °
Boonville, Tuesday, 27 October
Overcast. High 72°, low 54°.
Pressure29.88 inHg
Wind10.4 mph NW
Humidity26%
Visibility—
Dew point32°
Wed, 2865° / 42°0
65 °
Boonville, Wednesday, 28 October
Clear. High 65°, low 42°.
Pressure30.09 inHg
Wind10.6 mph NW
Humidity43%
Visibility—
Dew point35°
Thu, 2981° / 41°0
81 °
Boonville, Thursday, 29 October
Overcast. High 81°, low 41°.
Pressure30.15 inHg
Wind4.5 mph W
Humidity20%
Visibility—
Dew point21°
Fri, 3079° / 48°0
79 °
Boonville, Friday, 30 October
Overcast. High 79°, low 48°.
Pressure30.15 inHg
Wind5.8 mph W
Humidity16%
Visibility—
Dew point22°
Sat, 3159° / 46°0.18
59 °
Boonville, Saturday, 31 October
Light rain. High 59°, low 46°.
Pressure30.06 inHg
Wind3.3 mph S
Humidity74%
Visibility—
Dew point49°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0169° / 48°0.09
69 °
Boonville, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high69°
Average low48°
Average precipitation0.09 in
Chance of precipitation23%
Record high87° (1966)
Record low35° (2003)
Mon, 0269° / 47°0.08
69 °
Boonville, Monday, 2 November
Climate normal for this date — 60-year average.
Average high69°
Average low47°
Average precipitation0.08 in
Chance of precipitation17%
Record high86° (2020)
Record low37° (1990)
Tue, 0369° / 47°0.1
69 °
Boonville, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high69°
Average low47°
Average precipitation0.1 in
Chance of precipitation22%
Record high84° (1976)
Record low35° (2022)
Wed, 0468° / 48°0.08
68 °
Boonville, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high68°
Average low48°
Average precipitation0.08 in
Chance of precipitation23%
Record high86° (1976)
Record low36° (2011)
Thu, 0566° / 48°0.14
66 °
Boonville, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high66°
Average low48°
Average precipitation0.14 in
Chance of precipitation23%
Record high83° (2020)
Record low38° (2017)
Fri, 0665° / 48°0.13
65 °
Boonville, Friday, 6 November
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.13 in
Chance of precipitation30%
Record high81° (1976)
Record low39° (1971)
Sat, 0765° / 47°0.19
65 °
Boonville, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high65°
Average low47°
Average precipitation0.19 in
Chance of precipitation32%
Record high82° (2019)
Record low37° (2017)
Sun, 0864° / 46°0.15
64 °
Boonville, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high64°
Average low46°
Average precipitation0.15 in
Chance of precipitation35%
Record high81° (1978)
Record low35° (2021)
Mon, 0963° / 45°0.19
63 °
Boonville, Monday, 9 November
Climate normal for this date — 60-year average.
Average high63°
Average low45°
Average precipitation0.19 in
Chance of precipitation37%
Record high80° (1996)
Record low34° (2020)
Tue, 1063° / 46°0.21
63 °
Boonville, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high63°
Average low46°
Average precipitation0.21 in
Chance of precipitation30%
Record high82° (2025)
Record low34° (2000)
Wed, 1164° / 45°0.19
64 °
Boonville, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high64°
Average low45°
Average precipitation0.19 in
Chance of precipitation30%
Record high83° (2019)
Record low31° (1985)
Thu, 1263° / 46°0.12
63 °
Boonville, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high63°
Average low46°
Average precipitation0.12 in
Chance of precipitation28%
Record high79° (2019)
Record low30° (1985)
Fri, 1363° / 46°0.27
63 °
Boonville, Friday, 13 November
Climate normal for this date — 60-year average.
Average high63°
Average low46°
Average precipitation0.27 in
Chance of precipitation33%
Record high82° (1995)
Record low31° (1985)
Sat, 1463° / 45°0.11
63 °
Boonville, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high63°
Average low45°
Average precipitation0.11 in
Chance of precipitation25%
Record high82° (2008)
Record low31° (1978)
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 Boonville, 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 Boonville, 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.