September weather in Downey, ID
The average temperature in Downey in September is 58.9°F (40.9°F–76.9°F). Average precipitation: 1.44 inches.
September is a fall month in Downey, and is warmer than the annual average of 45.6°F. Daily temperatures swing about 36°F between overnight low and afternoon high. Daylight averages about 12h 16m. For travel, September is a comfortable month to visit.
Avg High
76.9°F
Avg Low
40.9°F
Precipitation
1.44 in
Daylight
12h 16m
September records in Downey
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 96.1°F (2022) | 33.1°F (2020) | 0.10 in (2017) |
| September 2 | 96.1°F (2019) | 32.0°F (2020) | 0.00 in (1896) |
| September 3 | 93.9°F (2022) | 30.0°F (1898) | 1.16 in (1897) |
| September 4 | 99.0°F (2022) | 28.9°F (1898) | 0.70 in (2023) |
| September 5 | 98.1°F (2022) | 30.0°F (1898) | 0.52 in (2023) |
| September 6 | 98.1°F (2020) | 25.0°F (1899) | 0.02 in (2019) |
| September 7 | 98.1°F (2022) | 21.0°F (1899) | 0.12 in (2019) |
| September 8 | 97.0°F (2022) | 25.0°F (1899) | 0.24 in (2020) |
| September 9 | 89.1°F (2021) | 28.0°F (1898) | 0.44 in (2014) |
| September 10 | 93.0°F (2021) | 21.9°F (1896) | 0.00 in (1896) |
| September 11 | 91.0°F (2021) | 28.0°F (2020) | 1.01 in (2019) |
| September 12 | 91.0°F (1899) | 28.9°F (1902) | 0.03 in (1897) |
| September 13 | 89.1°F (1899) | 30.0°F (1901) | 0.48 in (2017) |
| September 14 | 87.1°F (2015) | 25.0°F (1902) | 0.59 in (2016) |
| September 15 | 88.0°F (2020) | 25.0°F (1902) | 0.60 in (2017) |
| September 16 | 88.0°F (2018) | 25.0°F (1901) | 1.45 in (2015) |
| September 17 | 89.1°F (2014) | 25.0°F (1902) | 0.66 in (2015) |
| September 18 | 91.0°F (2014) | 30.0°F (1897) | 0.22 in (2024) |
| September 19 | 89.1°F (2014) | 28.0°F (1899) | 0.37 in (2017) |
| September 20 | 90.0°F (1898) | 30.0°F (1901) | 0.09 in (2020) |
| September 21 | 87.1°F (1898) | 30.0°F (1900) | 0.50 in (2017) |
| September 22 | 86.0°F (1898) | 19.9°F (1902) | 0.84 in (2017) |
| September 23 | 84.0°F (2015) | 28.0°F (2017) | 0.85 in (2016) |
| September 24 | 82.9°F (2015) | 27.0°F (2017) | 0.93 in (2016) |
| September 25 | 87.1°F (2014) | 17.1°F (1902) | 0.02 in (1900) |
| September 26 | 87.1°F (2014) | 21.9°F (1896) | 0.00 in (1896) |
| September 27 | 86.0°F (2015) | 19.9°F (1896) | 0.54 in (2014) |
| September 28 | 87.1°F (2024) | 19.9°F (1896) | 0.65 in (2014) |
| September 29 | 90.0°F (2024) | 21.9°F (1900) | 1.86 in (2019) |
| September 30 | 89.1°F (2024) | 19.9°F (1900) | 0.66 in (1897) |