San Marcos Weather in September
San Marcos in September sees high temperatures, with highs around 30°C (86°F) and overnight lows of 16°C (61°F). With just 4.6 mm (0.2 in) of rainfall on average, rain is rarely an issue.
Rainfall in San Marcos in September
Historically, the month has about a single day of rain, averaging 4.6 mm (0.2 in) in total. On the rare occasion it rains, expect a brief, moderate shower rather than a heavy downpour.
Temperature in San Marcos in September
September is a good time to be in San Marcos. Days are perfect, reaching 30°C (86°F), with nights around 16°C (61°F). Overall, the month follows a fairly predictable daily temperature pattern. At 16°C (61°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping. This is typically the warmest month of the year, so light summer clothing is a good idea.
Sunshine in San Marcos in September
Expect a lot of sunshine this month, with about 253 hours of sun. These sunny conditions add to the overall experience.September in San Marcos has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our San Marcos's climate page.
San Marcos Temperature in September
Min Temperature
16°C (61°F)
Max Temperature
30°C (86°F)
Chance of Rain
3%
Precipitation
4.6 mm (0.2 in)
Rainy days
a single day
Humidity
74% *
Sunshine
253 hours *
Percentage Sunshine
68% *
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
pleasant
tolerable
unpleasant
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What to Wear in San Marcos in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. With minimal rainfall expected, you can leave the rain gear at home. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in San Marcos in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our San Marcos's climate page.
Temperature Rainfall Sunshine Humidity
See the full San Marcos climate overview or explore weather in the United States of America.
