September weather in Portales, NM
The average temperature in Portales in September is 71.3°F (57.4°F–85.2°F). Average precipitation: 1.92 inches.
September is a fall month in Portales, and is warmer than the annual average of 60.1°F. Daily temperatures swing about 27.8°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 12m. For travel, September is a comfortable month to visit.
Avg High
85.2°F
Avg Low
57.4°F
Precipitation
1.92 in
Daylight
12h 12m
September records in Portales
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.9°F (1947) | 42.1°F (1915) | 1.27 in (1988) |
| September 2 | 100.0°F (1937) | 46.0°F (1950) | 1.80 in (1930) |
| September 3 | 102.9°F (1937) | 42.1°F (1974) | 1.88 in (1971) |
| September 4 | 100.9°F (1922) | 39.9°F (1961) | 0.49 in (2009) |
| September 5 | 104.0°F (1945) | 45.0°F (1961) | 1.44 in (1981) |
| September 6 | 102.9°F (1948) | 46.9°F (1984) | 1.83 in (1938) |
| September 7 | 104.0°F (2023) | 46.9°F (2004) | 1.57 in (1937) |
| September 8 | 100.9°F (2023) | 46.9°F (2004) | 1.46 in (2009) |
| September 9 | 97.0°F (1945) | 37.0°F (2020) | 1.84 in (1995) |
| September 10 | 97.0°F (1984) | 39.0°F (2020) | 1.12 in (1912) |
| September 11 | 97.0°F (1984) | 39.0°F (1913) | 1.42 in (2013) |
| September 12 | 97.0°F (1943) | 37.9°F (1913) | 2.15 in (1921) |
| September 13 | 98.1°F (2015) | 33.1°F (1959) | 1.60 in (1925) |
| September 14 | 99.0°F (1918) | 37.0°F (1959) | 0.72 in (1986) |
| September 15 | 98.1°F (1956) | 39.9°F (1947) | 2.88 in (1963) |
| September 16 | 100.0°F (1956) | 34.0°F (1951) | 2.85 in (1919) |
| September 17 | 99.0°F (1947) | 28.9°F (1929) | 1.38 in (1990) |
| September 18 | 99.0°F (1997) | 37.9°F (2006) | 1.25 in (1906) |
| September 19 | 100.0°F (1930) | 37.9°F (1905) | 0.52 in (2019) |
| September 20 | 96.1°F (1947) | 36.0°F (1942) | 2.05 in (1936) |
| September 21 | 96.1°F (1930) | 28.9°F (1983) | 2.10 in (1988) |
| September 22 | 96.1°F (1926) | 35.1°F (1972) | 2.10 in (1941) |
| September 23 | 95.0°F (1926) | 34.0°F (1946) | 1.16 in (2017) |
| September 24 | 93.9°F (2011) | 37.9°F (1989) | 1.19 in (1944) |
| September 25 | 96.1°F (2020) | 30.0°F (2000) | 1.45 in (1915) |
| September 26 | 99.0°F (2020) | 35.1°F (1942) | 2.58 in (2017) |
| September 27 | 97.0°F (1953) | 32.0°F (1942) | 1.15 in (1958) |
| September 28 | 93.9°F (1977) | 30.9°F (1924) | 1.49 in (1941) |
| September 29 | 93.9°F (2010) | 30.9°F (1945) | 1.65 in (1945) |
| September 30 | 98.1°F (1951) | 34.0°F (1942) | 1.90 in (1930) |