May weather in American Falls, ID
The average temperature in American Falls in May is 56.9°F (42.5°F–71.3°F). Average precipitation: 1.54 inches.
May is a spring month in American Falls, and is warmer than the annual average of 48.7°F. Daily temperatures swing about 28.8°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 14h 27m. For travel, May is a comfortable month to visit.
Avg High
71.3°F
Avg Low
42.5°F
Precipitation
1.54 in
Daylight
14h 27m
May records in American Falls
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 84.9°F (2023) | 26.1°F (2013) | 0.46 in (2022) |
| May 2 | 80.1°F (2014) | 27.0°F (2013) | 0.28 in (2009) |
| May 3 | 81.0°F (2023) | 30.9°F (2019) | 0.72 in (2022) |
| May 4 | 81.0°F (2023) | 30.0°F (2010) | 0.04 in (2009) |
| May 5 | 84.0°F (2017) | 25.0°F (2010) | 0.25 in (2024) |
| May 6 | 82.9°F (2018) | 28.0°F (2010) | 0.59 in (2014) |
| May 7 | 82.9°F (2018) | 25.0°F (2010) | 0.23 in (2016) |
| May 8 | 82.0°F (2018) | 28.0°F (2009) | 0.46 in (2011) |
| May 9 | 84.0°F (2018) | 28.9°F (2021) | 0.48 in (2011) |
| May 10 | 84.9°F (2025) | 28.9°F (2022) | 0.29 in (2011) |
| May 11 | 84.0°F (2013) | 30.0°F (2022) | 0.48 in (2010) |
| May 12 | 87.1°F (2013) | 35.1°F (2014) | 0.27 in (2018) |
| May 13 | 90.0°F (2013) | 28.0°F (2009) | 0.24 in (2024) |
| May 14 | 89.1°F (2013) | 28.9°F (2017) | 0.30 in (2025) |
| May 15 | 89.1°F (2012) | 36.0°F (2010) | 0.10 in (2016) |
| May 16 | 86.0°F (2012) | 35.1°F (2020) | 0.41 in (2015) |
| May 17 | 84.9°F (2009) | 32.0°F (2017) | 0.34 in (2017) |
| May 18 | 89.1°F (2009) | 30.0°F (2017) | 0.14 in (2019) |
| May 19 | 88.0°F (2009) | 36.0°F (2025) | 0.44 in (2015) |
| May 20 | 84.9°F (2012) | 33.1°F (2022) | 0.54 in (2015) |
| May 21 | 90.0°F (2012) | 28.0°F (2022) | 0.44 in (2016) |
| May 22 | 88.0°F (2012) | 34.0°F (2016) | 0.56 in (2024) |
| May 23 | 87.1°F (2014) | 28.0°F (2010) | 0.49 in (2023) |
| May 24 | 84.9°F (2014) | 35.1°F (2010) | 0.19 in (2009) |
| May 25 | 87.1°F (2018) | 33.1°F (2010) | 0.25 in (2019) |
| May 26 | 87.1°F (2018) | 33.1°F (2011) | 0.52 in (2012) |
| May 27 | 88.0°F (2014) | 37.0°F (2011) | 0.45 in (2012) |
| May 28 | 88.0°F (2014) | 34.0°F (2012) | 0.66 in (2022) |
| May 29 | 90.0°F (2020) | 37.0°F (2011) | 0.40 in (2011) |
| May 30 | 88.0°F (2020) | 37.0°F (2022) | 0.39 in (2015) |
| May 31 | 90.0°F (2020) | 39.9°F (2022) | 0.14 in (2018) |