The average temperature in San Antonio in April for a typical day ranges from a high of 85°F (29°C) to a low of 59°F (15°C). Some would describe it as pleasantly warm and breezy. For comparison, the hottest month in San Antonio, August, has days with highs of 100°F (38°C) and lows of 76°F (24°C). The coldest month, January has days with 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. The best time to visit San Antonio is from November to April, when the weather is comfortable and the hotel rates are lower. Summer sees the largest influx of tourists from in- and kj7vS.

weather in san antonio in april