In San Antonio the weather in April is generally perfect, with high temperatures and moderate rainfall. Anticipate daytime temperatures around 28°C , while night temperatures can drop to 15°C . San Antonio in April usually receives moderate rainfall, averaging around 59 mm for the month. 66 % April average humidity The relative humidity in San Antonio during April usually peaks at 83 percent in the morning then drops to 49 percent by mid afternoon. Wind 10.1 mph April wind speed average 16.3 kph April is one of the windiest months in San Antonio. Storms Reference Get the monthly weather forecast for San Antonio, TX, including daily high/low, historical averages, to help you plan ahead. Well, in San Antonio, April flowers give way to May showers as May is, on average, the wettest month of the year in the city, with almost 5 inches of average rainfall over the course of the month. Highs will regularly hover around 90° and lows will be in the low 70s. 2J9W.

weather in san antonio in april