Monthly outlook for Napa, CA: average high 77.7°, average low 53.8°. That is 2.7° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 2 days and 0.8 inches. The warmest day looks like 16 October (92.3°), the coolest 19 October (46.5°).
77.7°/53.8°
Average high / low
+2.7°
Above normal
0 / 2
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 October – 24 October
76.6°
74.4°
+1.2°
25 October – 3 November
79.7°
70.3°
+5.2°
4 November – 13 November
at normal
66°
—
October records over 66 years
103.3°1 October 2020All-time high
38.3°28 October 2023All-time low
Climate normals and records are computed from the nearest reference point — Fetters Hot Springs (10 mi).
Fri, 1692° / 54°0
92 °
Napa, Friday, 16 October
Clear. High 92°, low 54°.
Pressure30.09 inHg
Wind3.3 mph NE
Humidity13%
Visibility6.2 mi
Dew point28°
Sat, 1790° / 54°0
90 °
Napa, Saturday, 17 October
Clear. High 90°, low 54°.
Pressure30.06 inHg
Wind2.5 mph S
Humidity14%
Visibility6.2 mi
Dew point33°
Sun, 1874° / 51°0
74 °
Napa, Sunday, 18 October
Clear. High 74°, low 51°.
Pressure29.97 inHg
Wind4.7 mph SW
Humidity49%
Visibility6.2 mi
Dew point51°
Mon, 1969° / 46°0.01
69 °
Napa, Monday, 19 October
Light rain. High 69°, low 46°.
Pressure29.91 inHg
Wind4.6 mph SW
Humidity44%
Visibility6.2 mi
Dew point39°
Tue, 2069° / 47°0
69 °
Napa, Tuesday, 20 October
Overcast. High 69°, low 47°.
Pressure29.91 inHg
Wind6.3 mph SW
Humidity55%
Visibility—
Dew point43°
Wed, 2168° / 52°0
68 °
Napa, Wednesday, 21 October
Overcast. High 68°, low 52°.
Pressure29.91 inHg
Wind5.9 mph E
Humidity60%
Visibility—
Dew point47°
Thu, 2269° / 52°0
69 °
Napa, Thursday, 22 October
Clear. High 69°, low 52°.
Pressure30.09 inHg
Wind8.4 mph SW
Humidity54%
Visibility—
Dew point46°
Fri, 2372° / 49°0
72 °
Napa, Friday, 23 October
Clear. High 72°, low 49°.
Pressure30.21 inHg
Wind4.5 mph SW
Humidity43%
Visibility—
Dew point40°
Sat, 2474° / 56°0
74 °
Napa, Saturday, 24 October
Clear. High 74°, low 56°.
Pressure30.21 inHg
Wind15.5 mph N
Humidity16%
Visibility—
Dew point20°
Sun, 2575° / 58°0
75 °
Napa, Sunday, 25 October
Clear. High 75°, low 58°.
Pressure30.12 inHg
Wind10.9 mph N
Humidity13%
Visibility—
Dew point15°
Mon, 2679° / 53°0
79 °
Napa, Monday, 26 October
Mostly clear. High 79°, low 53°.
Pressure30.06 inHg
Wind7.4 mph N
Humidity13%
Visibility—
Dew point17°
Tue, 2777° / 56°0
77 °
Napa, Tuesday, 27 October
Partly cloudy. High 77°, low 56°.
Pressure30.15 inHg
Wind4.3 mph SE
Humidity15%
Visibility—
Dew point20°
Wed, 2879° / 58°0
79 °
Napa, Wednesday, 28 October
Overcast. High 79°, low 58°.
Pressure30.15 inHg
Wind3.6 mph NE
Humidity23%
Visibility—
Dew point30°
Thu, 2980° / 61°0
80 °
Napa, Thursday, 29 October
Overcast. High 80°, low 61°.
Pressure30.03 inHg
Wind4.3 mph N
Humidity20%
Visibility—
Dew point29°
Fri, 3087° / 61°0
87 °
Napa, Friday, 30 October
Partly cloudy. High 87°, low 61°.
Pressure30.00 inHg
Wind4.2 mph S
Humidity14%
Visibility—
Dew point23°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3170° / 49°0.04
70 °
Napa, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high70°
Average low49°
Average precipitation0.04 in
Chance of precipitation17%
Record high87° (1966)
Record low39° (2023)
Sun, 0170° / 49°0.07
70 °
Napa, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high70°
Average low49°
Average precipitation0.07 in
Chance of precipitation15%
Record high86° (1967)
Record low37° (2003)
Mon, 0270° / 49°0.05
70 °
Napa, Monday, 2 November
Climate normal for this date — 60-year average.
Average high70°
Average low49°
Average precipitation0.05 in
Chance of precipitation13%
Record high86° (1967)
Record low41° (1974)
Tue, 0370° / 49°0.04
70 °
Napa, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high70°
Average low49°
Average precipitation0.04 in
Chance of precipitation13%
Record high85° (2018)
Record low37° (2022)
Wed, 0469° / 49°0.03
69 °
Napa, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high69°
Average low49°
Average precipitation0.03 in
Chance of precipitation12%
Record high83° (1976)
Record low40° (1973)
Thu, 0568° / 49°0.08
68 °
Napa, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high68°
Average low49°
Average precipitation0.08 in
Chance of precipitation15%
Record high83° (2020)
Record low41° (2004)
Fri, 0667° / 50°0.07
67 °
Napa, Friday, 6 November
Climate normal for this date — 60-year average.
Average high67°
Average low50°
Average precipitation0.07 in
Chance of precipitation20%
Record high81° (1976)
Record low41° (1972)
Sat, 0767° / 49°0.1
67 °
Napa, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high67°
Average low49°
Average precipitation0.1 in
Chance of precipitation23%
Record high82° (1991)
Record low40° (2022)
Sun, 0866° / 48°0.09
66 °
Napa, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high66°
Average low48°
Average precipitation0.09 in
Chance of precipitation23%
Record high79° (1978)
Record low40° (1983)
Mon, 0965° / 47°0.11
65 °
Napa, Monday, 9 November
Climate normal for this date — 60-year average.
Average high65°
Average low47°
Average precipitation0.11 in
Chance of precipitation20%
Record high79° (1990)
Record low37° (2023)
Tue, 1064° / 47°0.16
64 °
Napa, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high64°
Average low47°
Average precipitation0.16 in
Chance of precipitation30%
Record high80° (1990)
Record low35° (2020)
Wed, 1164° / 47°0.11
64 °
Napa, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high64°
Average low47°
Average precipitation0.11 in
Chance of precipitation27%
Record high79° (1990)
Record low35° (2000)
Thu, 1265° / 47°0.08
65 °
Napa, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high65°
Average low47°
Average precipitation0.08 in
Chance of precipitation18%
Record high79° (1990)
Record low35° (1985)
Fri, 1364° / 47°0.17
64 °
Napa, Friday, 13 November
Climate normal for this date — 60-year average.
Average high64°
Average low47°
Average precipitation0.17 in
Chance of precipitation32%
Record high80° (1995)
Record low32° (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 Napa, 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 Napa, 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.