Monthly outlook for Zinfandel, CA: average high 76.5°, average low 51.7°. That is 1.2° above the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 2 days and 1.0 inches. The warmest day looks like 16 October (91.4°), the coolest 28 October (47.1°).
76.5°/51.7°
Average high / low
+1.2°
Above normal
1 / 2
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
76.9°
75.9°
+0.6°
26 October – 4 November
75.7°
71.4°
+2.4°
5 November – 14 November
at normal
66.4°
—
October records over 66 years
106°1 October 2020All-time high
39.7°29 October 1971All-time low
Climate normals and records are computed from the nearest reference point — St. Helena (2 mi).
Sat, 1790° / 53°0
90 °
Zinfandel, Saturday, 17 October
Clear. High 90°, low 53°.
Pressure30.06 inHg
Wind1.1 mph S
Humidity14%
Visibility6.2 mi
Dew point30°
Sun, 1879° / 52°0
79 °
Zinfandel, Sunday, 18 October
Clear. High 79°, low 52°.
Pressure29.94 inHg
Wind5.2 mph SW
Humidity30%
Visibility6.2 mi
Dew point44°
Mon, 1965° / 49°0.01
65 °
Zinfandel, Monday, 19 October
Light rain. High 65°, low 49°.
Pressure29.91 inHg
Wind9.1 mph W
Humidity41%
Visibility6.2 mi
Dew point36°
Tue, 2061° / 51°0.04
61 °
Zinfandel, Tuesday, 20 October
Light rain. High 61°, low 51°.
Pressure29.85 inHg
Wind6.1 mph NE
Humidity78%
Visibility—
Dew point50°
Wed, 2168° / 50°0
68 °
Zinfandel, Wednesday, 21 October
Overcast. High 68°, low 50°.
Pressure29.91 inHg
Wind6.3 mph NE
Humidity51%
Visibility—
Dew point43°
Thu, 2277° / 51°0
77 °
Zinfandel, Thursday, 22 October
Overcast. High 77°, low 51°.
Pressure29.94 inHg
Wind6.8 mph W
Humidity33%
Visibility—
Dew point39°
Fri, 2374° / 51°0
74 °
Zinfandel, Friday, 23 October
Overcast. High 74°, low 51°.
Pressure30.00 inHg
Wind4.1 mph E
Humidity53%
Visibility—
Dew point46°
Sat, 2482° / 52°0
82 °
Zinfandel, Saturday, 24 October
Clear. High 82°, low 52°.
Pressure30.12 inHg
Wind5.3 mph W
Humidity16%
Visibility—
Dew point23°
Sun, 2582° / 54°0
82 °
Zinfandel, Sunday, 25 October
Overcast. High 82°, low 54°.
Pressure30.15 inHg
Wind3.4 mph W
Humidity21%
Visibility—
Dew point30°
Mon, 2686° / 55°0
86 °
Zinfandel, Monday, 26 October
Overcast. High 86°, low 55°.
Pressure30.00 inHg
Wind5.2 mph W
Humidity13%
Visibility—
Dew point19°
Tue, 2777° / 56°0
77 °
Zinfandel, Tuesday, 27 October
Overcast. High 77°, low 56°.
Pressure29.88 inHg
Wind6.8 mph W
Humidity24%
Visibility—
Dew point32°
Wed, 2873° / 47°0
73 °
Zinfandel, Wednesday, 28 October
Clear. High 73°, low 47°.
Pressure30.03 inHg
Wind6.2 mph N
Humidity22%
Visibility—
Dew point25°
Thu, 2976° / 50°0
76 °
Zinfandel, Thursday, 29 October
Overcast. High 76°, low 50°.
Pressure30.12 inHg
Wind8.3 mph N
Humidity17%
Visibility—
Dew point20°
Fri, 3079° / 51°0
79 °
Zinfandel, Friday, 30 October
Overcast. High 79°, low 51°.
Pressure30.15 inHg
Wind5.9 mph SW
Humidity23%
Visibility—
Dew point29°
Sat, 3163° / 50°0
63 °
Zinfandel, Saturday, 31 October
Overcast. High 63°, low 50°.
Pressure30.09 inHg
Wind7.2 mph SW
Humidity63%
Visibility—
Dew point46°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0171° / 51°0.08
71 °
Zinfandel, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high71°
Average low51°
Average precipitation0.08 in
Chance of precipitation15%
Record high89° (1967)
Record low39° (2003)
Mon, 0271° / 50°0.06
71 °
Zinfandel, Monday, 2 November
Climate normal for this date — 60-year average.
Average high71°
Average low50°
Average precipitation0.06 in
Chance of precipitation18%
Record high87° (2020)
Record low42° (1971)
Tue, 0371° / 50°0.04
71 °
Zinfandel, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high71°
Average low50°
Average precipitation0.04 in
Chance of precipitation13%
Record high89° (2018)
Record low38° (2022)
Wed, 0471° / 51°0.04
71 °
Zinfandel, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high71°
Average low51°
Average precipitation0.04 in
Chance of precipitation13%
Record high85° (1976)
Record low40° (1973)
Thu, 0569° / 50°0.11
69 °
Zinfandel, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high69°
Average low50°
Average precipitation0.11 in
Chance of precipitation17%
Record high85° (2020)
Record low41° (2017)
Fri, 0668° / 51°0.08
68 °
Zinfandel, Friday, 6 November
Climate normal for this date — 60-year average.
Average high68°
Average low51°
Average precipitation0.08 in
Chance of precipitation18%
Record high82° (1991)
Record low42° (1972)
Sat, 0768° / 50°0.12
68 °
Zinfandel, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high68°
Average low50°
Average precipitation0.12 in
Chance of precipitation23%
Record high83° (1991)
Record low40° (2017)
Sun, 0866° / 49°0.09
66 °
Zinfandel, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high66°
Average low49°
Average precipitation0.09 in
Chance of precipitation20%
Record high82° (2019)
Record low40° (2021)
Mon, 0966° / 48°0.12
66 °
Zinfandel, Monday, 9 November
Climate normal for this date — 60-year average.
Average high66°
Average low48°
Average precipitation0.12 in
Chance of precipitation23%
Record high81° (1990)
Record low39° (2020)
Tue, 1065° / 48°0.19
65 °
Zinfandel, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.19 in
Chance of precipitation30%
Record high83° (2019)
Record low37° (2022)
Wed, 1165° / 48°0.13
65 °
Zinfandel, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.13 in
Chance of precipitation27%
Record high86° (2019)
Record low37° (2000)
Thu, 1266° / 48°0.09
66 °
Zinfandel, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high66°
Average low48°
Average precipitation0.09 in
Chance of precipitation23%
Record high80° (1990)
Record low33° (1985)
Fri, 1365° / 48°0.19
65 °
Zinfandel, Friday, 13 November
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.19 in
Chance of precipitation30%
Record high82° (1995)
Record low35° (1985)
Sat, 1465° / 48°0.07
65 °
Zinfandel, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.07 in
Chance of precipitation22%
Record high82° (2008)
Record low35° (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 Zinfandel, 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 Zinfandel, 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.