San Marcos

Current Weather

23°74°

Light Rain

Feels Like: 24°75°

Min: 21°70°

Max: 25°78°

The next few hours will be humid and overcast, with today reaching 25°C and dropping to 21°C. The coming days will be light rain throughout the day and possible thunderstorms in the afternoon.

Hourly Forecast
23°74°24°75°25°76°25°78°25°77°25°77°25°76°24°75°23°73°22°72°22°72°22°71°22°71°21°70°21°70°21°70°21°70°21°70°21°70°21°70°21°70°21°70°22°72°23°74°
80%
94%
94%
94%
100%
100%
100%
76%
76%
76%
30%
30%
30%
26%
26%
26%
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
5pm
6pm
7pm
8pm
9pm
10pm
11pm
12am
1am
2am
3am
4am
5am
6am
7am
8am
Today
Tomorrow

Want a closer look at the weather?

Premium adds minute-by-minute rain timing, yesterday comparisons, and more detail across Airpult.

Get Premium
Air Quality
18
Good

Air quality is satisfactory, and air pollution poses little or no risk.

GoodHazardous
Daylight Hours

05:34

Sunrise

17:19

Sunset

11 hours 45 minutes of sunlight today
Moon

07:05

Moonrise

18:05

Moonset

Daily Forecast

Today

21°70°
25°78°

Tuesday

21°70°
28°82°

Wednesday

20°69°
27°80°

Thursday

20°69°
27°81°

Friday

21°69°
28°82°

Saturday

21°70°
25°77°

Sunday

21°69°
27°80°

Monday

21°69°
26°78°

Tuesday

21°70°
25°77°

Wednesday

21°70°
27°80°
UV Index
Wear sunscreen
5Moderate
LowExtreme
Humidity
89%Humid
LowHigh
Looking at the night sky?

See moon phases, eclipses, and seasons for this year.

View astronomy
Current stargazing conditions?

See sky darkness, moon phase, and the best viewing window for San Marcos.

View stargazing score

Weather in San Marcos today, October 12, 2026

Expect unsettled, showery conditions in San Marcos on October 12, 2026 as rain moves through. The day opens on a wet note and needs flexible outdoor plans. Wetter spells lean into the morning, when rain odds reach about 94% near 10:00. Skies look heaviest around 09:00, with cover close to 86%.Expect unsettled, showery conditions in San Marcos on October 12, 2026 as rain moves through. The day opens on a wet note and needs flexible outdoor plans. Wetter spells lean into the morning, when rain odds reach about 94% near 10:00. Skies look heaviest around 09:00, with cover close to 86%.

Temperatures climb from an overnight low near 21°C toward a daytime high of about 25°C. Relative humidity sits between 80% and 99%, reaching its peak around 19:00. A lighter breeze peaks around 09:00 near 17 km/h.Temperatures climb from an overnight low near 70°F toward a daytime high of about 78°F. Relative humidity sits between 80% and 99%, reaching its peak around 19:00. A lighter breeze peaks around 09:00 near 11 mph.

Through the afternoon wet weather remains a factor, with rain chances near 100% around 13:00. Cloud also stays substantial, close to 87% near 23:00. Visibility stays generally good near 15.5 km on average, though it can drop toward 7.1 km in thicker cloud or showers. Daylight runs from 05:34 to 17:19, lasting 11 hours 45 minutes of sunlight today.Through the afternoon wet weather remains a factor, with rain chances near 100% around 13:00. Cloud also stays substantial, close to 87% near 23:00. Visibility stays generally good near 9.6 mi on average, though it can drop toward 4.4 mi in thicker cloud or showers. Daylight runs from 05:34 to 17:19, lasting 11 hours 45 minutes of sunlight today.

In short, treat October 12, 2026 in San Marcos as a damp day: pack covers, watch the wetter hours, and expect a high near 25°C.In short, treat October 12, 2026 in San Marcos as a damp day: pack covers, watch the wetter hours, and expect a high near 78°F.

Frequently asked questions about weather in San Marcos

How warm does it get in San Marcos?

The warmest month in San Marcos is April, with average high temperatures of 31°C. The average temperature during this period is around 26°C.The warmest month in San Marcos is April, with average high temperatures of 88°F. The average temperature during this period is around 79°F.

How cold does it get in San Marcos?

The coldest month in San Marcos is January, with average low temperatures of 20°C. The average temperature during this period is around 23°C.The coldest month in San Marcos is January, with average low temperatures of 69°F. The average temperature during this period is around 74°F.

What is the wettest time of year in San Marcos?

The wettest month in San Marcos is October, with an average of 314 mm of precipitation.The wettest month in San Marcos is October, with an average of 12.4 in of precipitation.

What is the driest time of year in San Marcos?

The driest month in San Marcos is March, with an average of 24 mm of precipitation.The driest month in San Marcos is March, with an average of 1 in of precipitation.

View full climate insights for San Marcos →