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Hourly Forecast
Daylight Hours
05:58
Sunrise
17:55
Sunset
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Waxing Gibbous
17:22
Moonrise
04:54
Moonset
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View stargazing scoreWeather in San Francisco la Unión today, September 25, 2026
San Francisco la Unión looks damp on September 25, 2026, so plan for wet spells during the day. Early travel and outdoor time should assume rain can arrive quickly. Morning plans should assume damp conditions, as rain chances climb toward 96% around 10:00. Cloud cover is also at its densest near 11:00 at roughly 94%.
Expect highs of 13°C and cooler readings close to 10°C. Relative humidity sits between 88% and 100%, reaching its peak around 06:00. Expect gentle winds, highest near 15:00 at 2.3 km/h.
The second half of the day still looks unsettled, with rain probability around 100% by 13:00. Dense cloud near 100% at 18:00 keeps the feel grey. Expect visibility near 13.4 km, with poorer spells close to 1.1 km. The sun rises at 05:58 and sets at 17:55, for a total of 11 hours 56 minutes of sunlight today.
Taken together, San Francisco la Unión looks wet enough on September 25, 2026 that flexible outdoor plans work best, with temperatures peaking near 13°C.
Frequently asked questions about weather in San Francisco la Unión
How warm does it get in San Francisco la Unión?
The warmest month in San Francisco la Unión is April, with average high temperatures of 23°C. The average temperature during this period is around 17°C.
How cold does it get in San Francisco la Unión?
The coldest month in San Francisco la Unión is January, with average low temperatures of 9°C. The average temperature during this period is around 14°C.
What is the wettest time of year in San Francisco la Unión?
The wettest month in San Francisco la Unión is June, with an average of 388mm of precipitation.
What is the driest time of year in San Francisco la Unión?
The driest month in San Francisco la Unión is February, with an average of 21mm of precipitation.
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