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San Marcos CA Weather - Clear - 74°F
Clear
74°F
Updated 10:49 am
Feels Like 77°F
Humidity 71%
Wind N 0 mph
Barometer  29.64 in
Dew Point 64°F
San Marcos CA Weather - Clear - 23°C
Clear
23°C
Updated 10:49 am
Feels Like 25°C
Humidity 71%
Wind N 0 km/h
Barometer  100.3 kPa
Dew Point 18°C
San Marcos, CA Weather and Current Conditionssan marcos ca weather forecast

San Marcos, CA Weather Forecast

San Marcos California WeatherSan Marcos, California Weather Weather Forecast
14 Day API San Marcos, CA Weather Forecast. Note: Our 7 day San Marcos, California weather forecast is our most reliable, and specific forecast. This model should only be used as a probable scenario. Forecasting more than 7 days ahead is challenging.
San Marcos, CA Weather Forecast Dated: 1049 AM Sat Oct 10 2026
Expect a very warm period with plenty of sunshine and mostly dry weather over the coming period. moderate humidity and no major pressure swings will dominate.

Saturday, October 10, 2026

Mid-Morning
San Marcos Weather - 2026-10-10 - Morning - Overcast
74°F 24°C
Overcast
Mid-Afternoon
San Marcos Weather - 2026-10-10 - Afternoon - Overcast
81°F 27°C
Overcast
Early-Evening
San Marcos Weather - 2026-10-10 - Evening - Overcast
72°F 22°C
Overcast
Warm and summery near 81°F 27°C, overcast throughout the day, with increasing humidity and barometric pressure falling. Winds turning from the NW to the SSE at 5 mph 8 km/h.

Sunday, October 11, 2026

Mid-Morning
San Marcos Weather - 2026-10-11 - Morning - Rain
65°F 18°C
Rain
Mid-Afternoon
San Marcos Weather - 2026-10-11 - Afternoon - Scattered Showers
66°F 19°C
Scattered Showers
Early-Evening
San Marcos Weather - 2026-10-11 - Evening - Scattered Showers
65°F 18°C
Scattered Showers
Mildly cool near 66°F 19°C, scattered downpours possible, with lower humidity and barometric pressure rising. Winds tapering down from WSW 18 mph 30 km/h to SSW 9 mph 13 km/h.

Monday, October 12, 2026

Mid-Morning
San Marcos Weather - 2026-10-12 - Morning - Light Showers
61°F 16°C
Light Showers
Mid-Afternoon
San Marcos Weather - 2026-10-12 - Afternoon - Light Showers
63°F 17°C
Light Showers
Early-Evening
San Marcos Weather - 2026-10-12 - Evening - Scattered Showers
61°F 16°C
Scattered Showers
Comfortable at 63°F 17°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds moving from the SW to the WNW at 7 mph 11 km/h.

Tuesday, October 13, 2026

Mid-Morning
San Marcos Weather - 2026-10-13 - Morning - Sunny
61°F 16°C
Sunny
Mid-Afternoon
San Marcos Weather - 2026-10-13 - Afternoon - Sunny
69°F 21°C
Sunny
Early-Evening
San Marcos Weather - 2026-10-13 - Evening - Sunny
64°F 18°C
Sunny
Mild temperatures up to 69°F 21°C, sunny throughout the day, with steady humidity and steady pressure. Winds swinging from the NE to the NW at 5 mph 9 km/h.

Wednesday, October 14, 2026

Mid-Morning
San Marcos Weather - 2026-10-14 - Morning - Sunny
67°F 19°C
Sunny
Mid-Afternoon
San Marcos Weather - 2026-10-14 - Afternoon - Sunny
76°F 25°C
Sunny
Early-Evening
San Marcos Weather - 2026-10-14 - Evening - Sunny
69°F 20°C
Sunny
Mild with a high of 76°F 25°C, sunny throughout the day, with increasing humidity and steady pressure. Winds shifting from the NE to the W at 4 mph 6 km/h.

Thursday, October 15, 2026

Mid-Morning
San Marcos Weather - 2026-10-15 - Morning - Sunny
73°F 23°C
Sunny
Mid-Afternoon
San Marcos Weather - 2026-10-15 - Afternoon - Sunny
83°F 28°C
Sunny
Early-Evening
San Marcos Weather - 2026-10-15 - Evening - Sunny
73°F 23°C
Sunny
Warm and summery near 83°F 28°C, sunny throughout the day, with increasing humidity and steady pressure. Winds turning from the SE to the S at 4 mph 7 km/h.

Friday, October 16, 2026

Mid-Morning
San Marcos Weather - 2026-10-16 - Morning - Sunny
78°F 26°C
Sunny
Mid-Afternoon
San Marcos Weather - 2026-10-16 - Afternoon - Sunny
89°F 32°C
Sunny
Early-Evening
San Marcos Weather - 2026-10-16 - Evening - Sunny
80°F 27°C
Sunny
Balmy with temperatures reaching 89°F 32°C, sunny throughout the day, with steady humidity and steady pressure. Winds switching from the NNE to the NE at 5 mph 8 km/h.

Saturday, October 17, 2026

Mid-Morning
San Marcos Weather - 2026-10-17 - Morning - Sunny
83°F 28°C
Sunny
Mid-Afternoon
San Marcos Weather - 2026-10-17 - Afternoon - Cloudy
94°F 34°C
Cloudy
Early-Evening
San Marcos Weather - 2026-10-17 - Evening - Cloudy
83°F 28°C
Cloudy
Sizzling hot with 94°F 34°C, sunny in the morning, partly cloudy in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds moving from the ENE to the E at 3 mph 4 km/h.

Sunday, October 18, 2026

Mid-Morning
San Marcos Weather - 2026-10-18 - Morning - Sunny
80°F 27°C
Sunny
Mid-Afternoon
San Marcos Weather - 2026-10-18 - Afternoon - Sunny
84°F 29°C
Sunny
Early-Evening
San Marcos Weather - 2026-10-18 - Evening - Sunny
77°F 25°C
Sunny
Warm temperatures up to 84°F 29°C, sunny throughout the day, with steady humidity and steady pressure. Winds swinging from the WSW to the SSE at 3 mph 4 km/h.

Monday, October 19, 2026

Mid-Morning
San Marcos Weather - 2026-10-19 - Morning - Partly Cloudy
74°F 23°C
Partly Cloudy
Mid-Afternoon
San Marcos Weather - 2026-10-19 - Afternoon - Sunny
80°F 27°C
Sunny
Early-Evening
San Marcos Weather - 2026-10-19 - Evening - Sunny
72°F 23°C
Sunny
Very warm with a high of 80°F 27°C, cloudy in the morning, becoming sunny through the afternoon and evening, with increasing humidity and steady pressure. Winds shifting from the ESE to the S at 4 mph 7 km/h.

Tuesday, October 20, 2026

Mid-Morning
San Marcos Weather - 2026-10-20 - Morning - Sunny
71°F 22°C
Sunny
Mid-Afternoon
San Marcos Weather - 2026-10-20 - Afternoon - Sunny
78°F 26°C
Sunny
Early-Evening
San Marcos Weather - 2026-10-20 - Evening - Sunny
71°F 22°C
Sunny
Pleasant near 78°F 26°C, sunny throughout the day, with steady humidity and steady pressure. Winds turning from the SSE to the WNW at 4 mph 6 km/h.

Wednesday, October 21, 2026

Mid-Morning
San Marcos Weather - 2026-10-21 - Morning - Sunny
73°F 23°C
Sunny
Mid-Afternoon
San Marcos Weather - 2026-10-21 - Afternoon - Sunny
81°F 27°C
Sunny
Early-Evening
San Marcos Weather - 2026-10-21 - Evening - Sunny
73°F 23°C
Sunny
Balmy with temperatures reaching 81°F 27°C, sunny throughout the day, with steady humidity and steady pressure. Winds switching from the WSW to the NW at 3 mph 5 km/h.

Thursday, October 22, 2026

Mid-Morning
San Marcos Weather - 2026-10-22 - Morning - Sunny
73°F 23°C
Sunny
Mid-Afternoon
San Marcos Weather - 2026-10-22 - Afternoon - Sunny
78°F 25°C
Sunny
Early-Evening
San Marcos Weather - 2026-10-22 - Evening - Sunny
71°F 22°C
Sunny
Enjoyable around 78°F 25°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with increasing humidity and steady pressure. Winds out of the WSW at 9 mph 15 km/h.

Friday, October 23, 2026

Mid-Morning
San Marcos Weather - 2026-10-23 - Morning - Sunny
69°F 20°C
Sunny
Mid-Afternoon
San Marcos Weather - 2026-10-23 - Afternoon - Overcast
73°F 23°C
Overcast
Early-Evening
San Marcos Weather - 2026-10-23 - Evening - Overcast
67°F 20°C
Overcast
Mild temperatures up to 73°F 23°C, sunny in the morning, cloudy in the afternoon, and overcast this evening, with steady humidity and steady pressure. Winds blowing from the WSW at 11 mph 17 km/h.

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Weather by the Numbers

Sat, 10th
San Marcos CA Weather - Saturday, Oct 10, 2026 - Overcast
Hi: 83°F 28°C
Lo: 66°F 19°C
Sunrise 06:49 AM
Sunset 06:21 PM
Wind W 5 mph8 km/h
Dew Point 57°F14°C
uv Index 6
Barometric Pressure 29.62 in1003 mb
POP 11% *
Humidity 45%
Sun, 11th
San Marcos CA Weather - Sunday, Oct 11, 2026 - Light Drizzle
Hi: 69°F 21°C
Lo: 63°F 17°C
Sunrise 06:50 AM
Sunset 06:20 PM
Wind WSW 13 mph22 km/h
Dew Point 57°F14°C
uv Index 1
Barometric Pressure 29.71 in1006 mb
POP 37% *
Humidity 74%
Mon, 12th
San Marcos CA Weather - Monday, Oct 12, 2026 - Patchy Rain Nearby
Hi: 64°F 18°C
Lo: 58°F 14°C
Sunrise 06:51 AM
Sunset 06:19 PM
Wind SSW 13 mph21 km/h
Dew Point 50°F10°C
uv Index 4
Barometric Pressure 29.94 in1014 mb
POP 19% *
Humidity 60%
Tue, 13th
San Marcos CA Weather - Tuesday, Oct 13, 2026 - Sunny
Hi: 69°F 21°C
Lo: 56°F 13°C
Sunrise 06:52 AM
Sunset 06:17 PM
Wind W 5 mph8 km/h
Dew Point 44°F7°C
uv Index 5
Barometric Pressure 30.03 in1017 mb
POP 1% *
Humidity 43%
Wed, 14th
San Marcos CA Weather - Wednesday, Oct 14, 2026 - Sunny
Hi: 77°F 25°C
Lo: 59°F 15°C
Sunrise 06:52 AM
Sunset 06:16 PM
Wind W 5 mph8 km/h
Dew Point 40°F4°C
uv Index 6
Barometric Pressure 30.06 in1018 mb
POP 0% *
Humidity 27%
Thu, 15th
San Marcos CA Weather - Thursday, Oct 15, 2026 - Sunny
Hi: 84°F 29°C
Lo: 63°F 17°C
Sunrise 06:53 AM
Sunset 06:15 PM
Wind NW 5 mph8 km/h
Dew Point 34°F1°C
uv Index 7
Barometric Pressure 30 in1016 mb
POP 0% *
Humidity 18%
Fri, 16th
San Marcos CA Weather - Friday, Oct 16, 2026 - Sunny
Hi: 91°F 33°C
Lo: 69°F 20°C
Sunrise 06:54 AM
Sunset 06:14 PM
Wind E 6 mph10 km/h
Dew Point 33°F0°C
uv Index 8
Barometric Pressure 29.94 in1014 mb
POP 0% *
Humidity 13%
Sat, 17th
San Marcos CA Weather - Saturday, Oct 17, 2026 - Sunny
Hi: 95°F 35°C
Lo: 74°F 24°C
Sunrise 06:55 AM
Sunset 06:13 PM
Wind SE 4 mph7 km/h
Dew Point 40°F5°C
uv Index 8
Barometric Pressure 29.91 in1013 mb
POP 0% *
Humidity 16%
Sun, 18th
San Marcos CA Weather - Sunday, Oct 18, 2026 - Sunny
Hi: 86°F 30°C
Lo: 74°F 23°C
Sunrise 06:56 AM
Sunset 06:11 PM
Wind SW 8 mph12 km/h
Dew Point 51°F10°C
uv Index 8
Barometric Pressure 29.97 in1015 mb
POP 1% *
Humidity 29%
Mon, 19th
San Marcos CA Weather - Monday, Oct 19, 2026 - Sunny
Hi: 82°F 28°C
Lo: 68°F 20°C
Sunrise 06:56 AM
Sunset 06:10 PM
Wind WSW 6 mph9 km/h
Dew Point 52°F11°C
uv Index 7
Barometric Pressure 29.97 in1015 mb
POP 2% *
Humidity 37%
Tue, 20th
San Marcos CA Weather - Tuesday, Oct 20, 2026 - Sunny
Hi: 80°F 27°C
Lo: 64°F 18°C
Sunrise 06:57 AM
Sunset 06:09 PM
Wind WSW 6 mph10 km/h
Dew Point 55°F13°C
uv Index 7
Barometric Pressure 29.91 in1013 mb
POP 1% *
Humidity 45%
Wed, 21st
San Marcos CA Weather - Wednesday, Oct 21, 2026 - Sunny
Hi: 83°F 28°C
Lo: 66°F 19°C
Sunrise 06:58 AM
Sunset 06:08 PM
Wind WSW 6 mph10 km/h
Dew Point 55°F13°C
uv Index 7
Barometric Pressure 29.91 in1013 mb
POP 1% *
Humidity 41%
Thu, 22nd
San Marcos CA Weather - Thursday, Oct 22, 2026 - Partly Cloudy
Hi: 79°F 26°C
Lo: 67°F 19°C
Sunrise 06:59 AM
Sunset 06:07 PM
Wind WSW 7 mph12 km/h
Dew Point 58°F15°C
uv Index 7
Barometric Pressure 29.91 in1013 mb
POP 3% *
Humidity 49%
Fri, 23rd
San Marcos CA Weather - Friday, Oct 23, 2026 - Partly Cloudy
Hi: 75°F 24°C
Lo: 64°F 18°C
Sunrise 07:00 AM
Sunset 06:06 PM
Wind WSW 9 mph14 km/h
Dew Point 60°F15°C
uv Index 6
Barometric Pressure 29.94 in1014 mb
POP 5% *
Humidity 61%
* POP = Probability of Precipitation. Data for 12:00 PM.