September weather in Norco, CA
The average temperature in Norco in September is 76.5°F (60.4°F–92.7°F). Average precipitation: 0.06 inches.
September is a fall month in Norco, and is warmer than the annual average of 66.1°F. Daily temperatures swing about 32.3°F between overnight low and afternoon high. Expect about 1 days with precipitation. Daylight averages about 12h 12m. For travel, September is hot.
Avg High
92.7°F
Avg Low
60.4°F
Precipitation
0.06 in
Daylight
12h 12m
September records in Norco
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 114.1°F (2017) | 53.1°F (2005) | 0.00 in (1998) |
| September 2 | 111.0°F (2007) | 50.0°F (2012) | 0.02 in (1998) |
| September 3 | 111.9°F (2007) | 48.9°F (2000) | 0.15 in (2017) |
| September 4 | 111.0°F (2022) | 51.1°F (2005) | 0.00 in (1998) |
| September 5 | 120.0°F (2020) | 48.9°F (2005) | 0.00 in (1998) |
| September 6 | 120.9°F (2020) | 50.0°F (2000) | 0.00 in (1998) |
| September 7 | 109.0°F (2022) | 52.0°F (2005) | 0.00 in (1998) |
| September 8 | 111.0°F (2024) | 51.1°F (2002) | 0.03 in (2022) |
| September 9 | 108.0°F (2024) | 46.9°F (2000) | 0.17 in (2022) |
| September 10 | 104.0°F (2015) | 46.9°F (2000) | 0.03 in (2023) |
| September 11 | 104.0°F (2017) | 48.9°F (2000) | 0.06 in (2022) |
| September 12 | 106.0°F (2000) | 52.0°F (2011) | 0.00 in (1998) |
| September 13 | 104.0°F (2014) | 51.1°F (2005) | 0.00 in (1998) |
| September 14 | 108.0°F (2014) | 52.0°F (1999) | 0.00 in (1998) |
| September 15 | 108.0°F (2014) | 51.1°F (2005) | 0.73 in (2015) |
| September 16 | 109.0°F (2014) | 51.1°F (2002) | 0.00 in (1998) |
| September 17 | 106.0°F (2020) | 48.0°F (2006) | 0.00 in (1998) |
| September 18 | 107.1°F (2016) | 48.9°F (2006) | 0.02 in (2025) |
| September 19 | 102.9°F (2016) | 50.0°F (2006) | 0.01 in (2005) |
| September 20 | 107.1°F (2015) | 46.9°F (1999) | 0.18 in (2005) |
| September 21 | 107.1°F (2003) | 50.0°F (2004) | 0.01 in (2005) |
| September 22 | 105.1°F (2002) | 48.9°F (2004) | 0.14 in (2007) |
| September 23 | 107.1°F (2002) | 48.0°F (2010) | 0.00 in (1998) |
| September 24 | 105.1°F (2009) | 50.0°F (1998) | 0.01 in (2000) |
| September 25 | 108.0°F (2010) | 50.0°F (2005) | 0.00 in (1998) |
| September 26 | 109.9°F (2010) | 51.1°F (2024) | 0.00 in (1998) |
| September 27 | 113.0°F (2010) | 46.9°F (2013) | 0.01 in (2006) |
| September 28 | 102.9°F (2020) | 48.9°F (2013) | 0.00 in (1998) |
| September 29 | 109.0°F (2020) | 48.9°F (2013) | 0.00 in (1998) |
| September 30 | 111.9°F (2020) | 48.0°F (2013) | 0.01 in (2023) |