See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
22°
Drizzle and Humid
Feels Like: 23°
Min: 22°
Max: 29°
The next few hours will be humid and overcast, with tomorrow reaching 27°C and dropping to 21°C. The coming days will be drizzle
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
05:37
Sunrise
17:34
Sunset
Moon
Waxing Gibbous
16:21
Moonrise
03:43
Moonset
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View stargazing scoreWeather in San Marcos tomorrow, September 25, 2026
Expect unsettled, showery conditions in San Marcos on September 25, 2026 as rain moves through. The day opens on a wet note and needs flexible outdoor plans. The morning carries the wetter risk, with rain chances near 78% and the highest odds around 07:00. Cloud is also thick early on, peaking near 93% around 00:00.
Temperatures climb from an overnight low near 21°C toward a daytime high of about 27°C. Moisture in the air spans 72%-100%, with the highest values around 02:00. A lighter breeze peaks around 09:00 near 4.1 km/h.
Afternoon showers stay in play, peaking near 76% around 12:00. Skies remain cluttered, with cover about 92% by 22:00. Visibility stays generally good near 15.4 km on average, though it can drop toward 5.1 km in thicker cloud or showers. Daylight runs from 05:37 to 17:34, lasting 11 hours 56 minutes of sunlight today.
Taken together, San Marcos looks wet enough on September 25, 2026 that flexible outdoor plans work best, with temperatures peaking near 27°C.
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 34°C. The average temperature during this period is around 28°C.
How cold does it get in San Marcos?
The coldest month in San Marcos is January, with average low temperatures of 22°C. The average temperature during this period is around 26°C.
What is the wettest time of year in San Marcos?
The wettest month in San Marcos is October, with an average of 416mm of precipitation.
What is the driest time of year in San Marcos?
The driest month in San Marcos is February, with an average of 3mm of precipitation.
