December weather in American Falls, ID
The average temperature in American Falls in December is 27.2°F (20.0°F–34.5°F). Average precipitation: 0.87 inches.
December is a winter month in American Falls, and is cooler than the annual average of 48.7°F. Daily temperatures swing about 14.5°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 8h 52m. For travel, December is cold.
Avg High
34.5°F
Avg Low
20.0°F
Precipitation
0.87 in
Daylight
8h 52m
December records in American Falls
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 55.9°F (2008) | -0.9°F (2015) | 0.17 in (2012) |
| December 2 | 59.0°F (2021) | 1.9°F (2015) | 0.31 in (2012) |
| December 3 | 55.0°F (2021) | 3.0°F (2009) | 0.28 in (2010) |
| December 4 | 57.0°F (2021) | 1.0°F (2013) | 0.17 in (2022) |
| December 5 | 50.0°F (2014) | -0.9°F (2013) | 0.48 in (2012) |
| December 6 | 55.9°F (2014) | -0.9°F (2013) | 0.36 in (2010) |
| December 7 | 52.0°F (2014) | 1.9°F (2013) | 0.28 in (2023) |
| December 8 | 50.0°F (2015) | -4.0°F (2016) | 0.12 in (2008) |
| December 9 | 57.9°F (2015) | -7.1°F (2013) | 0.28 in (2016) |
| December 10 | 57.9°F (2025) | -14.1°F (2009) | 0.30 in (2016) |
| December 11 | 57.0°F (2014) | -7.1°F (2013) | 0.17 in (2019) |
| December 12 | 59.0°F (2014) | -2.0°F (2013) | 0.23 in (2019) |
| December 13 | 57.9°F (2025) | 3.0°F (2013) | 0.20 in (2014) |
| December 14 | 48.0°F (2025) | 5.0°F (2008) | 0.44 in (2019) |
| December 15 | 46.0°F (2025) | 3.0°F (2008) | 0.11 in (2016) |
| December 16 | 42.1°F (2020) | 3.9°F (2013) | 0.16 in (2024) |
| December 17 | 43.0°F (2018) | 0.0°F (2008) | 0.21 in (2012) |
| December 18 | 48.9°F (2024) | -2.9°F (2008) | 0.08 in (2015) |
| December 19 | 44.1°F (2015) | -7.1°F (2016) | 0.48 in (2010) |
| December 20 | 46.0°F (2017) | 3.9°F (2022) | 0.12 in (2015) |
| December 21 | 55.9°F (2020) | 9.0°F (2008) | 0.09 in (2017) |
| December 22 | 51.1°F (2020) | -8.0°F (2022) | 0.49 in (2008) |
| December 23 | 46.9°F (2019) | -0.9°F (2022) | 0.31 in (2021) |
| December 24 | 42.1°F (2019) | 1.0°F (2011) | 0.10 in (2021) |
| December 25 | 41.0°F (2022) | 3.9°F (2011) | 0.20 in (2018) |
| December 26 | 45.0°F (2011) | 3.9°F (2015) | 0.16 in (2021) |
| December 27 | 46.9°F (2022) | -4.0°F (2015) | 0.33 in (2021) |
| December 28 | 46.9°F (2011) | -0.9°F (2018) | 0.32 in (2024) |
| December 29 | 48.0°F (2011) | 1.9°F (2012) | 0.25 in (2024) |
| December 30 | 57.0°F (2011) | -2.0°F (2014) | 0.15 in (2021) |
| December 31 | 45.0°F (2011) | -11.9°F (2015) | 0.53 in (2022) |