April weather in San Marcos, TX
The average temperature in San Marcos in April is 68.0°F (56.3°F–79.8°F). Average precipitation: 3.20 inches.
April is a spring month in San Marcos, and is cooler than the annual average of 68.6°F. Daily temperatures swing about 23.5°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 44m. For travel, April is one of the best months of the year to visit.
Avg High
79.8°F
Avg Low
56.3°F
Precipitation
3.20 in
Daylight
12h 44m
April records in San Marcos
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| April 1 | 98.1°F (1939) | 35.1°F (1931) | 1.59 in (1945) |
| April 2 | 102.0°F (1939) | 35.1°F (1961) | 1.94 in (1919) |
| April 3 | 95.0°F (1939) | 30.0°F (1936) | 1.85 in (2017) |
| April 4 | 91.9°F (1927) | 32.0°F (1987) | 4.60 in (1922) |
| April 5 | 98.1°F (1936) | 30.0°F (1920) | 2.16 in (1896) |
| April 6 | 93.0°F (1935) | 33.1°F (1970) | 4.00 in (1918) |
| April 7 | 96.1°F (2006) | 30.0°F (1971) | 4.00 in (1921) |
| April 8 | 95.0°F (1948) | 34.0°F (1938) | 1.56 in (1942) |
| April 9 | 96.1°F (2009) | 32.0°F (1973) | 2.31 in (1959) |
| April 10 | 97.0°F (1963) | 30.9°F (1938) | 1.40 in (1924) |
| April 11 | 95.0°F (1934) | 34.0°F (1938) | 1.47 in (1969) |
| April 12 | 95.0°F (1948) | 33.1°F (1951) | 6.00 in (2017) |
| April 13 | 97.0°F (1982) | 32.0°F (1940) | 2.36 in (2016) |
| April 14 | 93.9°F (1924) | 33.1°F (1980) | 0.92 in (1950) |
| April 15 | 93.9°F (1961) | 34.0°F (1928) | 1.17 in (2010) |
| April 16 | 99.0°F (1920) | 32.0°F (1961) | 2.31 in (1977) |
| April 17 | 102.0°F (1920) | 32.0°F (1921) | 2.07 in (2009) |
| April 18 | 97.0°F (1996) | 39.9°F (1919) | 3.38 in (2016) |
| April 19 | 98.1°F (1996) | 39.0°F (1924) | 2.80 in (1949) |
| April 20 | 100.0°F (1951) | 39.0°F (1924) | 2.18 in (1977) |
| April 21 | 93.9°F (1920) | 37.9°F (1931) | 6.60 in (1926) |
| April 22 | 98.1°F (1951) | 37.9°F (1931) | 1.84 in (1914) |
| April 23 | 98.1°F (1942) | 42.1°F (1959) | 1.92 in (2001) |
| April 24 | 93.9°F (1955) | 44.1°F (1907) | 4.99 in (1905) |
| April 25 | 97.0°F (1996) | 42.1°F (1968) | 2.48 in (1997) |
| April 26 | 96.1°F (1984) | 42.1°F (1913) | 3.85 in (1907) |
| April 27 | 93.0°F (1917) | 43.0°F (1913) | 2.62 in (1957) |
| April 28 | 96.1°F (1929) | 42.1°F (1952) | 1.66 in (1941) |
| April 29 | 96.1°F (2014) | 44.1°F (1952) | 3.39 in (1975) |
| April 30 | 96.1°F (1929) | 39.9°F (1996) | 2.78 in (1960) |