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Napa County, CA Weather Forecast
Napa County, CA Weather Forecast Dated: 413 AM Sun Sep 27 2026
Expect a hot stretch with plenty of sunshine and mostly dry weather over the coming period. comfortable humidity and no major pressure swings will dominate.
Sunday, September 27, 2026
Mid-Morning
58°F 14°C
Overcast
Mid-Afternoon
75°F 24°C
Sunny
Early-Evening
60°F 16°C
Sunny
Pleasant near 75°F 24°C, overcast in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds out of the SSW at 10 mph 17 km/h.
Monday, September 28, 2026
Mid-Morning
62°F 17°C
Sunny
Mid-Afternoon
86°F 30°C
Sunny
Early-Evening
71°F 22°C
Sunny
Balmy with temperatures reaching 86°F 30°C, sunny throughout the day, with lower humidity and steady pressure.
Tuesday, September 29, 2026
Mid-Morning
72°F 22°C
Overcast
Mid-Afternoon
97°F 36°C
Sunny
Early-Evening
77°F 25°C
Sunny
Sizzling hot with 97°F 36°C, overcast in the morning, becoming sunny through the afternoon and evening, with steady humidity and barometric pressure falling.
Wednesday, September 30, 2026
Mid-Morning
73°F 23°C
Sunny
Mid-Afternoon
96°F 36°C
Sunny
Early-Evening
77°F 25°C
Sunny
Hot temperatures near 96°F 36°C, sunny throughout the day, with steady humidity and steady pressure.
Thursday, October 1, 2026
Mid-Morning
71°F 21°C
Overcast
Mid-Afternoon
87°F 31°C
Partly Cloudy
Early-Evening
71°F 22°C
Cloudy
Very warm with a high of 87°F 31°C, overcast in the morning, becoming cloudy through the afternoon and evening, with increasing humidity and steady pressure.
Friday, October 2, 2026
Mid-Morning
71°F 22°C
Overcast
Mid-Afternoon
88°F 31°C
Overcast
Early-Evening
74°F 24°C
Overcast
Warm and summery near 88°F 31°C, overcast throughout the day, with steady humidity and steady pressure.
Saturday, October 3, 2026
Mid-Morning
74°F 23°C
Sunny
Mid-Afternoon
97°F 36°C
Sunny
Early-Evening
81°F 28°C
Sunny
Hot and sweltering around 97°F 36°C, sunny throughout the day, with steady humidity and steady pressure.
Sunday, October 4, 2026
Mid-Morning
76°F 25°C
Sunny
Mid-Afternoon
100°F 38°C
Sunny
Early-Evening
83°F 28°C
Sunny
Dangerously hot with a high of 100°F 38°C, sunny throughout the day, with steady humidity and steady pressure.
Monday, October 5, 2026
Mid-Morning
75°F 24°C
Sunny
Mid-Afternoon
88°F 31°C
Scattered Showers
Early-Evening
76°F 24°C
Overcast
Warm temperatures up to 88°F 31°C, locally heavy downpours at times, with increasing humidity and steady pressure. Winds switching from the WNW to the WSW at 4 mph 6 km/h.
Tuesday, October 6, 2026
Mid-Morning
72°F 22°C
Sunny
Mid-Afternoon
89°F 32°C
Sunny
Early-Evening
79°F 26°C
Sunny
Very warm with a high of 89°F 32°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure.
Wednesday, October 7, 2026
Mid-Morning
73°F 23°C
Sunny
Mid-Afternoon
91°F 33°C
Sunny
Early-Evening
79°F 26°C
Sunny
Very hot with temperatures reaching 91°F 33°C, sunny throughout the day, with lower humidity and steady pressure.
Thursday, October 8, 2026
Mid-Morning
78°F 25°C
Sunny
Mid-Afternoon
95°F 35°C
Sunny
Early-Evening
81°F 27°C
Sunny
Hot and sweltering around 95°F 35°C, sunny throughout the day, with steady humidity and steady pressure.
Friday, October 9, 2026
Mid-Morning
79°F 26°C
Sunny
Mid-Afternoon
99°F 37°C
Sunny
Early-Evening
83°F 28°C
Sunny
Sizzling hot with 99°F 37°C, sunny throughout the day, with steady humidity and steady pressure.
Saturday, October 10, 2026
Mid-Morning
80°F 27°C
Sunny
Mid-Afternoon
100°F 38°C
Sunny
Early-Evening
84°F 29°C
Sunny
Sweltering heat reaching 100°F 38°C, sunny throughout the day, with steady humidity and steady pressure.
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