Monthly outlook for Vacaville, CA: average high 74.4°, average low 50.5°. That is 0.2° above the climate normal for October. Precipitation is expected on 1 day (about 0.3 inches), against a normal of 2 days and 0.8 inches. The warmest day looks like 17 October (90°), the coolest 18 October (43.4°).
74.4°/50.5°
Average high / low
+0.2°
Above normal
1 / 2
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
75.4°
75.7°
-0.2°
26 October – 4 November
72.7°
70.9°
+1°
5 November – 14 November
at normal
66.1°
—
October records over 66 years
104.4°1 October 2020All-time high
40.1°28 October 2023All-time low
Sat, 1790° / 49°0
90 °
Vacaville, Saturday, 17 October
Clear. High 90°, low 49°.
Pressure30.06 inHg
Wind3 mph NE
Humidity17%
Visibility6.2 mi
Dew point33°
Sun, 1880° / 43°0
80 °
Vacaville, Sunday, 18 October
Clear. High 80°, low 43°.
Pressure29.94 inHg
Wind5.1 mph SW
Humidity32%
Visibility6.2 mi
Dew point46°
Mon, 1969° / 48°0
69 °
Vacaville, Monday, 19 October
Light rain. High 69°, low 48°.
Pressure29.94 inHg
Wind5.1 mph SW
Humidity44%
Visibility6.2 mi
Dew point42°
Tue, 2068° / 48°0
68 °
Vacaville, Tuesday, 20 October
Overcast. High 68°, low 48°.
Pressure29.88 inHg
Wind4.9 mph NE
Humidity47%
Visibility6.2 mi
Dew point43°
Wed, 2176° / 56°0
76 °
Vacaville, Wednesday, 21 October
Overcast. High 76°, low 56°.
Pressure29.91 inHg
Wind4.4 mph SW
Humidity33%
Visibility—
Dew point37°
Thu, 2266° / 53°0.28
66 °
Vacaville, Thursday, 22 October
Rain. High 66°, low 53°.
Pressure30.00 inHg
Wind10.5 mph SW
Humidity75%
Visibility—
Dew point53°
Fri, 2371° / 49°0
71 °
Vacaville, Friday, 23 October
Clear. High 71°, low 49°.
Pressure30.03 inHg
Wind8.3 mph NW
Humidity51%
Visibility—
Dew point44°
Sat, 2476° / 51°0
76 °
Vacaville, Saturday, 24 October
Clear. High 76°, low 51°.
Pressure29.97 inHg
Wind12.1 mph SW
Humidity22%
Visibility—
Dew point26°
Sun, 2568° / 47°0
68 °
Vacaville, Sunday, 25 October
Overcast. High 68°, low 47°.
Pressure30.06 inHg
Wind6.5 mph SW
Humidity55%
Visibility—
Dew point44°
Mon, 2673° / 53°0
73 °
Vacaville, Monday, 26 October
Overcast. High 73°, low 53°.
Pressure30.00 inHg
Wind9.8 mph NE
Humidity29%
Visibility—
Dew point31°
Tue, 2781° / 58°0
81 °
Vacaville, Tuesday, 27 October
Overcast. High 81°, low 58°.
Pressure29.85 inHg
Wind6.8 mph N
Humidity21%
Visibility—
Dew point29°
Wed, 2871° / 51°0
71 °
Vacaville, Wednesday, 28 October
Overcast. High 71°, low 51°.
Pressure29.65 inHg
Wind11.5 mph SW
Humidity50%
Visibility—
Dew point45°
Thu, 2968° / 46°0
68 °
Vacaville, Thursday, 29 October
Clear. High 68°, low 46°.
Pressure30.03 inHg
Wind5.1 mph W
Humidity51%
Visibility—
Dew point41°
Fri, 3069° / 48°0
69 °
Vacaville, Friday, 30 October
Overcast. High 69°, low 48°.
Pressure30.06 inHg
Wind6.7 mph NE
Humidity48%
Visibility—
Dew point41°
Sat, 3174° / 53°0
74 °
Vacaville, Saturday, 31 October
Overcast. High 74°, low 53°.
Pressure30.09 inHg
Wind4.7 mph W
Humidity35%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0171° / 51°0.05
71 °
Vacaville, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high71°
Average low51°
Average precipitation0.05 in
Chance of precipitation13%
Record high88° (1967)
Record low39° (2019)
Mon, 0271° / 50°0.04
71 °
Vacaville, Monday, 2 November
Climate normal for this date — 60-year average.
Average high71°
Average low50°
Average precipitation0.04 in
Chance of precipitation13%
Record high87° (1967)
Record low42° (2003)
Tue, 0370° / 50°0.04
70 °
Vacaville, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high70°
Average low50°
Average precipitation0.04 in
Chance of precipitation12%
Record high88° (2018)
Record low38° (2022)
Wed, 0470° / 50°0.03
70 °
Vacaville, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high70°
Average low50°
Average precipitation0.03 in
Chance of precipitation10%
Record high82° (1976)
Record low39° (1973)
Thu, 0569° / 50°0.07
69 °
Vacaville, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high69°
Average low50°
Average precipitation0.07 in
Chance of precipitation13%
Record high83° (2020)
Record low41° (2017)
Fri, 0668° / 51°0.07
68 °
Vacaville, Friday, 6 November
Climate normal for this date — 60-year average.
Average high68°
Average low51°
Average precipitation0.07 in
Chance of precipitation15%
Record high82° (1991)
Record low43° (1972)
Sat, 0768° / 50°0.07
68 °
Vacaville, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high68°
Average low50°
Average precipitation0.07 in
Chance of precipitation18%
Record high81° (1991)
Record low41° (1971)
Sun, 0866° / 49°0.06
66 °
Vacaville, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high66°
Average low49°
Average precipitation0.06 in
Chance of precipitation15%
Record high80° (1990)
Record low41° (2021)
Mon, 0966° / 48°0.09
66 °
Vacaville, Monday, 9 November
Climate normal for this date — 60-year average.
Average high66°
Average low48°
Average precipitation0.09 in
Chance of precipitation18%
Record high81° (1990)
Record low39° (1998)
Tue, 1065° / 48°0.14
65 °
Vacaville, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.14 in
Chance of precipitation30%
Record high80° (1990)
Record low37° (2020)
Wed, 1165° / 48°0.1
65 °
Vacaville, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.1 in
Chance of precipitation27%
Record high79° (1990)
Record low37° (2000)
Thu, 1265° / 47°0.07
65 °
Vacaville, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high65°
Average low47°
Average precipitation0.07 in
Chance of precipitation22%
Record high78° (1990)
Record low35° (1985)
Fri, 1365° / 48°0.14
65 °
Vacaville, Friday, 13 November
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.14 in
Chance of precipitation30%
Record high81° (1995)
Record low33° (1985)
Sat, 1465° / 47°0.06
65 °
Vacaville, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high65°
Average low47°
Average precipitation0.06 in
Chance of precipitation18%
Record high80° (2008)
Record low36° (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 Vacaville, 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 Vacaville, 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.