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Hourly Forecast
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05:59
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17:56
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Waxing Gibbous
17:23
Moonrise
04:55
Moonset
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View stargazing scoreWeather in San Marcos today, September 25, 2026
Rain features in San Marcos on September 25, 2026, so keep waterproofs handy through the day. The damp theme is strongest where shower chances rise. Early hours look the most unsettled, with rain probability near 100% by 02:00. The thickest cloud arrives around 02:00, reaching about 98%.
Expect highs of 17°C and cooler readings close to 13°C. Relative humidity sits between 85% and 100%, reaching its peak around 02:00. Winds stay light, near 1.7 km/h by 09:00, so the day feels still more than breezy.
Expect the wet theme to continue later, as rain odds reach 100% near 12:00. Cloud amounts hold near 100% around 18:00. Horizontal visibility sits around 5.8 km, briefly nearer 0.4 km. Daylight runs from 05:59 to 17:56, 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 17°C.
Frequently asked questions about weather in San Marcos
How warm does it get in San Marcos?
The warmest month in San Marcos is May, with average high temperatures of 22°C. The average temperature during this period is around 17°C.
How cold does it get in San Marcos?
The coldest month in San Marcos is January, with average low temperatures of 10°C. The average temperature during this period is around 15°C.
What is the wettest time of year in San Marcos?
The wettest month in San Marcos is June, with an average of 481mm of precipitation.
What is the driest time of year in San Marcos?
The driest month in San Marcos is February, with an average of 28mm of precipitation.
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