September weather in Rio Vista, TX
The average temperature in Rio Vista in September is 77.1°F (65.7°F–88.6°F). Average precipitation: 3.02 inches.
September is a fall month in Rio Vista, and is warmer than the annual average of 65°F. Daily temperatures swing about 22.9°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 12h 11m. For travel, September is hot.
Avg High
88.6°F
Avg Low
65.7°F
Precipitation
3.02 in
Daylight
12h 11m
September records in Rio Vista
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 111.9°F (1939) | 54.0°F (1915) | 3.23 in (1976) |
| September 2 | 114.1°F (1939) | 53.1°F (1915) | 6.35 in (1986) |
| September 3 | 109.9°F (1939) | 57.0°F (1974) | 3.30 in (1984) |
| September 4 | 111.0°F (2000) | 51.1°F (1974) | 5.22 in (1943) |
| September 5 | 108.0°F (1963) | 50.0°F (1974) | 4.20 in (2007) |
| September 6 | 108.0°F (1963) | 48.9°F (1974) | 2.68 in (1920) |
| September 7 | 106.0°F (1963) | 50.0°F (1974) | 1.93 in (1942) |
| September 8 | 107.1°F (2023) | 52.0°F (1918) | 5.76 in (2010) |
| September 9 | 104.0°F (1931) | 53.1°F (2004) | 4.57 in (1948) |
| September 10 | 109.0°F (2023) | 53.1°F (1929) | 1.15 in (1987) |
| September 11 | 102.0°F (1930) | 50.0°F (1968) | 1.44 in (2003) |
| September 12 | 102.9°F (1926) | 46.9°F (1940) | 3.43 in (1961) |
| September 13 | 102.9°F (1926) | 50.0°F (1940) | 2.75 in (2009) |
| September 14 | 106.0°F (2011) | 48.9°F (1945) | 1.90 in (1934) |
| September 15 | 106.0°F (2011) | 46.9°F (1945) | 1.67 in (1966) |
| September 16 | 102.9°F (1968) | 50.0°F (1945) | 2.35 in (1975) |
| September 17 | 102.0°F (1931) | 48.9°F (1951) | 1.80 in (1936) |
| September 18 | 100.9°F (1980) | 45.0°F (1981) | 0.87 in (1967) |
| September 19 | 100.9°F (1956) | 42.1°F (1981) | 4.96 in (1958) |
| September 20 | 102.0°F (1953) | 43.0°F (1971) | 3.50 in (2013) |
| September 21 | 100.0°F (1956) | 44.1°F (1913) | 1.14 in (1974) |
| September 22 | 99.0°F (1925) | 39.9°F (1983) | 2.91 in (1957) |
| September 23 | 100.9°F (2005) | 44.1°F (1994) | 5.20 in (2018) |
| September 24 | 100.9°F (1907) | 48.0°F (1914) | 2.70 in (1925) |
| September 25 | 102.9°F (1931) | 42.1°F (1989) | 3.22 in (1913) |
| September 26 | 104.0°F (1977) | 41.0°F (2000) | 2.82 in (1946) |
| September 27 | 107.1°F (1977) | 30.0°F (1908) | 6.16 in (1936) |
| September 28 | 107.1°F (1953) | 37.9°F (1908) | 1.49 in (1930) |
| September 29 | 105.1°F (2005) | 39.0°F (1908) | 2.22 in (1959) |
| September 30 | 100.9°F (1977) | 39.9°F (1984) | 2.65 in (2012) |