San Antonio weather
Our guide to the weather in San Antonio during March
We've looked at the most up-to-date weather data for San Antonio, covering the last 12 years up to 2026, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about San Antonio weather in March.
What's the temperature like in San Antonio during March?
The temperature reaches around 16℃ during the daytime in March, falling away to 5℃ at night. The UV index will be moderate at this time of year, so not something to worry about for the average person. However, if you're going to be outside for long periods it's worth wearing a broad spectrum SPF 30+ sunscreen and UV-blocking sunglasses. Remember that bright surfaces, such as water and sand increase UV exposure.
Does it rain in San Antonio during March?
March is typically the wettest month in San Antonio. On average, there will be 6 rainy days during the month, amounting to 89.4mm in total. That's a significant amount of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. There's a small chance that you'll catch a thunderstorm during your trip.
Is it windy in San Antonio during March?
You're unlikely to experience any strong winds. Expect a light breeze that picks up slightly at times in March. With moderate humidity, the wind will feel chilly, so you'll want to wear layers.
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