September weather in Richland, OR
The average temperature in Richland in September is 61.4°F (42.8°F–80.0°F). Average precipitation: inches.
September is a fall month in Richland, and is warmer than the annual average of 49.5°F. Daily temperatures swing about 37.2°F between overnight low and afternoon high. Daylight averages about 12h 18m. For travel, September is a comfortable month to visit.
Avg High
80.0°F
Avg Low
42.8°F
Precipitation
in
Daylight
12h 18m
September records in Richland
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.0°F (1945) | 35.1°F (1999) | 0.57 in (1964) |
| September 2 | 104.0°F (1950) | 33.1°F (1900) | 0.35 in (1964) |
| September 3 | 102.9°F (1955) | 32.0°F (1956) | 0.37 in (1952) |
| September 4 | 105.1°F (1955) | 34.0°F (1897) | 0.80 in (1946) |
| September 5 | 102.9°F (1955) | 33.1°F (1921) | 0.48 in (1959) |
| September 6 | 102.0°F (1955) | 30.9°F (1899) | 0.61 in (1970) |
| September 7 | 100.0°F (1955) | 30.0°F (1992) | 0.64 in (1970) |
| September 8 | 102.9°F (1969) | 30.0°F (1992) | 0.61 in (1985) |
| September 9 | 99.0°F (1955) | 30.9°F (1899) | 0.33 in (1985) |
| September 10 | 98.1°F (1955) | 30.9°F (1921) | 0.24 in (2010) |
| September 11 | 98.1°F (1955) | 28.9°F (1910) | 0.44 in (1985) |
| September 12 | 97.0°F (1948) | 30.0°F (1921) | 0.50 in (2004) |
| September 13 | 98.1°F (1948) | 28.0°F (1921) | 0.40 in (1906) |
| September 14 | 100.0°F (1953) | 26.1°F (1970) | 0.96 in (1959) |
| September 15 | 100.0°F (1953) | 28.9°F (1992) | 0.36 in (1959) |
| September 16 | 100.0°F (1953) | 27.0°F (1921) | 0.71 in (1910) |
| September 17 | 98.1°F (1953) | 23.0°F (1965) | 0.71 in (1985) |
| September 18 | 96.1°F (1922) | 24.1°F (1965) | 0.60 in (1989) |
| September 19 | 95.0°F (1955) | 27.0°F (1947) | 0.46 in (1973) |
| September 20 | 95.0°F (1917) | 23.0°F (1983) | 1.10 in (2006) |
| September 21 | 96.1°F (1952) | 26.1°F (1983) | 0.90 in (2008) |
| September 22 | 98.1°F (1966) | 26.1°F (2000) | 0.23 in (1917) |
| September 23 | 95.0°F (1966) | 25.0°F (2000) | 1.70 in (1917) |
| September 24 | 96.1°F (1966) | 25.0°F (2000) | 0.80 in (1901) |
| September 25 | 93.9°F (1947) | 21.9°F (1908) | 0.26 in (1986) |
| September 26 | 96.1°F (1963) | 18.0°F (1900) | 0.85 in (1959) |
| September 27 | 96.1°F (1963) | 26.1°F (1955) | 0.17 in (1956) |
| September 28 | 96.1°F (1963) | 21.0°F (1999) | 0.30 in (1962) |
| September 29 | 95.0°F (1963) | 19.9°F (1900) | 0.32 in (1991) |
| September 30 | 95.0°F (1957) | 23.0°F (1954) | 0.93 in (1951) |