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San Quentin CA Weather - Clear - 86°F
Clear
86°F
Updated 3:14 pm
Feels Like 83°F
Humidity 42%
Wind VRB 5 mph
Barometer  29.86 in
Dew Point 60°F
San Quentin CA Weather - Clear - 30°C
Clear
30°C
Updated 3:14 pm
Feels Like 28°C
Humidity 42%
Wind VRB 8 km/h
Barometer  101.1 kPa
Dew Point 16°C
San Quentin, CA Weather and Current Conditionssan quentin ca weather forecast

San Quentin, CA Weather Forecast

San Quentin California WeatherSan Quentin, California Weather Weather Forecast
14 day API San Quentin, CA weather forecast. Note. Our 7-day weather forecast for San Quentin, California is our most reliable and accurate forecast. This model should only be used as a likely scenario. Forecasting more than 7 days is difficult.
San Quentin, CA Weather Forecast Dated: 314 PM Fri Sep 11 2026
Expect a mild stretch with plenty of sunshine and mostly dry weather over the coming period. generally humid conditions and no major pressure swings will dominate.

Friday, September 11, 2026

Mid-Morning
San Quentin Weather - 2026-09-11 - Morning - Sunny
65°F 18°C
Sunny
Mid-Afternoon
San Quentin Weather - 2026-09-11 - Afternoon - Sunny
87°F 31°C
Sunny
Early-Evening
San Quentin Weather - 2026-09-11 - Evening - Sunny
73°F 23°C
Sunny
Warm and summery near 87°F 31°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds out of the SSW at 11 mph 17 km/h.

Saturday, September 12, 2026

Mid-Morning
San Quentin Weather - 2026-09-12 - Morning - Sunny
62°F 16°C
Sunny
Mid-Afternoon
San Quentin Weather - 2026-09-12 - Afternoon - Sunny
69°F 20°C
Sunny
Early-Evening
San Quentin Weather - 2026-09-12 - Evening - Sunny
61°F 16°C
Sunny
Comfortable with temperatures reaching 69°F 20°C, sunny throughout the day, with steady humidity and steady pressure. Winds switching from the WSW to the W at 10 mph 16 km/h.

Sunday, September 13, 2026

Mid-Morning
San Quentin Weather - 2026-09-13 - Morning - Sunny
59°F 15°C
Sunny
Mid-Afternoon
San Quentin Weather - 2026-09-13 - Afternoon - Sunny
69°F 21°C
Sunny
Early-Evening
San Quentin Weather - 2026-09-13 - Evening - Partly Cloudy
65°F 18°C
Partly Cloudy
Enjoyable around 69°F 21°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds moving from the NW to the SW at 8 mph 12 km/h.

Monday, September 14, 2026

Mid-Morning
San Quentin Weather - 2026-09-14 - Morning - Sunny
64°F 18°C
Sunny
Mid-Afternoon
San Quentin Weather - 2026-09-14 - Afternoon - Sunny
71°F 22°C
Sunny
Early-Evening
San Quentin Weather - 2026-09-14 - Evening - Sunny
63°F 17°C
Sunny
Mild temperatures up to 71°F 22°C, sunny throughout the day, with increasing humidity and steady pressure. Winds swinging from the S to the SW at 7 mph 11 km/h.

Tuesday, September 15, 2026

Mid-Morning
San Quentin Weather - 2026-09-15 - Morning - Sunny
60°F 16°C
Sunny
Mid-Afternoon
San Quentin Weather - 2026-09-15 - Afternoon - Sunny
67°F 20°C
Sunny
Early-Evening
San Quentin Weather - 2026-09-15 - Evening - Sunny
62°F 17°C
Sunny
Refreshing around 67°F 20°C, sunny throughout the day, with steady humidity and steady pressure. Winds shifting from the SSE to the SW at 11 mph 17 km/h.

Wednesday, September 16, 2026

Mid-Morning
San Quentin Weather - 2026-09-16 - Morning - Sunny
60°F 15°C
Sunny
Mid-Afternoon
San Quentin Weather - 2026-09-16 - Afternoon - Sunny
68°F 20°C
Sunny
Early-Evening
San Quentin Weather - 2026-09-16 - Evening - Sunny
62°F 17°C
Sunny
Pleasant near 68°F 20°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds turning from the SSW to the W at 7 mph 12 km/h.

Thursday, September 17, 2026

Mid-Morning
San Quentin Weather - 2026-09-17 - Morning - Sunny
60°F 16°C
Sunny
Mid-Afternoon
San Quentin Weather - 2026-09-17 - Afternoon - Sunny
71°F 21°C
Sunny
Early-Evening
San Quentin Weather - 2026-09-17 - Evening - Overcast
65°F 18°C
Overcast
Comfortable with temperatures reaching 71°F 21°C, sunny through the afternoon, turning cloudy this evening, with steady humidity and steady pressure. Winds switching from the WSW to the W at 6 mph 11 km/h.

Friday, September 18, 2026

Mid-Morning
San Quentin Weather - 2026-09-18 - Morning - Sunny
64°F 18°C
Sunny
Mid-Afternoon
San Quentin Weather - 2026-09-18 - Afternoon - Sunny
71°F 22°C
Sunny
Early-Evening
San Quentin Weather - 2026-09-18 - Evening - Sunny
64°F 17°C
Sunny
Enjoyable around 71°F 22°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds moving from the SSW to the WSW at 8 mph 13 km/h.

Saturday, September 19, 2026

Mid-Morning
San Quentin Weather - 2026-09-19 - Morning - Sunny
60°F 16°C
Sunny
Mid-Afternoon
San Quentin Weather - 2026-09-19 - Afternoon - Sunny
67°F 20°C
Sunny
Early-Evening
San Quentin Weather - 2026-09-19 - Evening - Sunny
61°F 16°C
Sunny
Refreshing around 67°F 20°C, sunny throughout the day, with steady humidity and steady pressure. Winds W at 13 mph 20 km/h.

Sunday, September 20, 2026

Mid-Morning
San Quentin Weather - 2026-09-20 - Morning - Sunny
58°F 14°C
Sunny
Mid-Afternoon
San Quentin Weather - 2026-09-20 - Afternoon - Sunny
69°F 21°C
Sunny
Early-Evening
San Quentin Weather - 2026-09-20 - Evening - Sunny
64°F 18°C
Sunny
Mild with a high of 69°F 21°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds shifting from the WSW to the SSW at 7 mph 11 km/h.

Monday, September 21, 2026

Mid-Morning
San Quentin Weather - 2026-09-21 - Morning - Sunny
65°F 18°C
Sunny
Mid-Afternoon
San Quentin Weather - 2026-09-21 - Afternoon - Sunny
77°F 25°C
Sunny
Early-Evening
San Quentin Weather - 2026-09-21 - Evening - Sunny
72°F 23°C
Sunny
Pleasant near 77°F 25°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds turning from the SSE to the SW at 8 mph 12 km/h.

Tuesday, September 22, 2026

Mid-Morning
San Quentin Weather - 2026-09-22 - Morning - Sunny
67°F 20°C
Sunny
Mid-Afternoon
San Quentin Weather - 2026-09-22 - Afternoon - Sunny
76°F 25°C
Sunny
Early-Evening
San Quentin Weather - 2026-09-22 - Evening - Sunny
66°F 19°C
Sunny
Comfortable with temperatures reaching 76°F 25°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds increasing from the NNE at 3 mph 4 km/h to SSW at 13 mph 21 km/h.

Wednesday, September 23, 2026

Mid-Morning
San Quentin Weather - 2026-09-23 - Morning - Sunny
60°F 16°C
Sunny
Mid-Afternoon
San Quentin Weather - 2026-09-23 - Afternoon - Cloudy
66°F 19°C
Cloudy
Early-Evening
San Quentin Weather - 2026-09-23 - Evening - Sunny
61°F 16°C
Sunny
Refreshing around 66°F 19°C, sunny in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds moving from the SSE to the SSW at 12 mph 19 km/h.

Thursday, September 24, 2026

Mid-Morning
San Quentin Weather - 2026-09-24 - Morning - Sunny
60°F 16°C
Sunny
Mid-Afternoon
San Quentin Weather - 2026-09-24 - Afternoon - Sunny
64°F 18°C
Sunny
Early-Evening
San Quentin Weather - 2026-09-24 - Evening - Sunny
59°F 15°C
Sunny
Mildly cool near 64°F 18°C, sunny throughout the day, with steady humidity and steady pressure. Winds swinging from the SSE to the WSW at 10 mph 15 km/h.

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Weather by the Numbers

Fri, 11th
San Quentin CA Weather - Friday, Sep 11, 2026 - Sunny
Hi: 89°F 31°C
Lo: 55°F 13°C
Sunrise 06:49 AM
Sunset 07:24 PM
Wind SSW 10 mph15 km/h
Dew Point 54°F12°C
uv Index 7
Barometric Pressure 29.91 in1013 mb
POP 1% *
Humidity 32%
Sat, 12th
San Quentin CA Weather - Saturday, Sep 12, 2026 - Sunny
Hi: 70°F 21°C
Lo: 56°F 14°C
Sunrise 06:49 AM
Sunset 07:23 PM
Wind SW 9 mph14 km/h
Dew Point 50°F10°C
uv Index 7
Barometric Pressure 29.91 in1013 mb
POP 2% *
Humidity 51%
Sun, 13th
San Quentin CA Weather - Sunday, Sep 13, 2026 - Sunny
Hi: 70°F 21°C
Lo: 53°F 12°C
Sunrise 06:50 AM
Sunset 07:21 PM
Wind SSE 5 mph8 km/h
Dew Point 47°F9°C
uv Index 6
Barometric Pressure 30 in1016 mb
POP 2% *
Humidity 54%
Mon, 14th
San Quentin CA Weather - Monday, Sep 14, 2026 - Sunny
Hi: 71°F 22°C
Lo: 57°F 14°C
Sunrise 06:51 AM
Sunset 07:20 PM
Wind S 8 mph12 km/h
Dew Point 53°F12°C
uv Index 6
Barometric Pressure 29.88 in1012 mb
POP 3% *
Humidity 59%
Tue, 15th
San Quentin CA Weather - Tuesday, Sep 15, 2026 - Sunny
Hi: 68°F 20°C
Lo: 56°F 13°C
Sunrise 06:52 AM
Sunset 07:18 PM
Wind S 8 mph13 km/h
Dew Point 55°F13°C
uv Index 5
Barometric Pressure 29.91 in1013 mb
POP 5% *
Humidity 68%
Wed, 16th
San Quentin CA Weather - Wednesday, Sep 16, 2026 - Sunny
Hi: 68°F 20°C
Lo: 56°F 13°C
Sunrise 06:53 AM
Sunset 07:16 PM
Wind SSW 8 mph13 km/h
Dew Point 54°F12°C
uv Index 5
Barometric Pressure 30 in1016 mb
POP 5% *
Humidity 67%
Thu, 17th
San Quentin CA Weather - Thursday, Sep 17, 2026 - Sunny
Hi: 72°F 22°C
Lo: 56°F 14°C
Sunrise 06:54 AM
Sunset 07:15 PM
Wind SSE 5 mph9 km/h
Dew Point 53°F12°C
uv Index 5
Barometric Pressure 30.09 in1019 mb
POP 4% *
Humidity 62%
Fri, 18th
San Quentin CA Weather - Friday, Sep 18, 2026 - Sunny
Hi: 72°F 22°C
Lo: 58°F 15°C
Sunrise 06:55 AM
Sunset 07:13 PM
Wind S 7 mph11 km/h
Dew Point 55°F13°C
uv Index 6
Barometric Pressure 30.03 in1017 mb
POP 3% *
Humidity 59%
Sat, 19th
San Quentin CA Weather - Saturday, Sep 19, 2026 - Sunny
Hi: 69°F 20°C
Lo: 57°F 14°C
Sunrise 06:55 AM
Sunset 07:12 PM
Wind WSW 8 mph12 km/h
Dew Point 54°F12°C
uv Index 5
Barometric Pressure 30.03 in1017 mb
POP 4% *
Humidity 63%
Sun, 20th
San Quentin CA Weather - Sunday, Sep 20, 2026 - Sunny
Hi: 70°F 21°C
Lo: 54°F 12°C
Sunrise 06:56 AM
Sunset 07:10 PM
Wind SE 5 mph8 km/h
Dew Point 50°F10°C
uv Index 5
Barometric Pressure 30 in1016 mb
POP 3% *
Humidity 60%
Mon, 21st
San Quentin CA Weather - Monday, Sep 21, 2026 - Sunny
Hi: 80°F 27°C
Lo: 60°F 16°C
Sunrise 06:57 AM
Sunset 07:08 PM
Wind SE 4 mph6 km/h
Dew Point 53°F12°C
uv Index 6
Barometric Pressure 29.85 in1011 mb
POP 3% *
Humidity 56%
Tue, 22nd
San Quentin CA Weather - Tuesday, Sep 22, 2026 - Sunny
Hi: 77°F 25°C
Lo: 60°F 16°C
Sunrise 06:58 AM
Sunset 07:07 PM
Wind ESE 5 mph9 km/h
Dew Point 53°F12°C
uv Index 6
Barometric Pressure 29.77 in1008 mb
POP 2% *
Humidity 49%
Wed, 23rd
San Quentin CA Weather - Wednesday, Sep 23, 2026 - Sunny
Hi: 66°F 19°C
Lo: 57°F 14°C
Sunrise 06:59 AM
Sunset 07:05 PM
Wind S 7 mph12 km/h
Dew Point 52°F11°C
uv Index 5
Barometric Pressure 29.68 in1005 mb
POP 5% *
Humidity 66%
Thu, 24th
San Quentin CA Weather - Thursday, Sep 24, 2026 - Sunny
Hi: 64°F 18°C
Lo: 54°F 12°C
Sunrise 07:00 AM
Sunset 07:04 PM
Wind S 9 mph15 km/h
Dew Point 51°F11°C
uv Index 5
Barometric Pressure 29.83 in1010 mb
POP 5% *
Humidity 66%
* POP = Probability of Precipitation. Data for 12:00 PM.