May weather in Swan, IA
The average temperature in Swan in May is 60.9°F (50.8°F–71.0°F). Average precipitation: 4.78 inches.
May is a spring month in Swan, and is warmer than the annual average of 49.5°F. Daily temperatures swing about 20.2°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 20m. For travel, May is a comfortable month to visit.
Avg High
71.0°F
Avg Low
50.8°F
Precipitation
4.78 in
Daylight
14h 20m
May records in Swan
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 86.4°F (2021) | 34.3°F (2005) | 0.17 in (2018) |
| May 2 | 82.6°F (2021) | 32.4°F (2013) | 1.52 in (2013) |
| May 3 | 81.7°F (2015) | 27.1°F (2011) | 0.83 in (2013) |
| May 4 | 81.0°F (2012) | 30.0°F (2005) | 0.30 in (2013) |
| May 5 | 82.9°F (2012) | 36.1°F (2006) | 0.44 in (2023) |
| May 6 | 83.1°F (2016) | 31.6°F (2006) | 1.65 in (2007) |
| May 7 | 86.4°F (2014) | 37.6°F (2006) | 0.57 in (2024) |
| May 8 | 82.6°F (2018) | 36.5°F (2020) | 0.81 in (2021) |
| May 9 | 91.9°F (2022) | 31.1°F (2020) | 0.50 in (2013) |
| May 10 | 93.7°F (2011) | 37.0°F (2019) | 1.35 in (2017) |
| May 11 | 90.7°F (2022) | 36.9°F (2021) | 1.28 in (2005) |
| May 12 | 92.3°F (2022) | 32.4°F (2013) | 2.37 in (2005) |
| May 13 | 82.0°F (2007) | 34.5°F (2019) | 0.44 in (2018) |
| May 14 | 92.7°F (2013) | 37.2°F (2016) | 0.78 in (2020) |
| May 15 | 87.4°F (2017) | 36.7°F (2016) | 1.00 in (2009) |
| May 16 | 80.8°F (2022) | 34.3°F (2014) | 0.78 in (2019) |
| May 17 | 81.5°F (2018) | 35.2°F (2014) | 1.05 in (2020) |
| May 18 | 86.5°F (2024) | 36.3°F (2025) | 0.67 in (2019) |
| May 19 | 86.9°F (2022) | 37.6°F (2015) | 1.50 in (2025) |
| May 20 | 81.5°F (2014) | 40.3°F (2023) | 1.54 in (2024) |
| May 21 | 81.5°F (2007) | 37.9°F (2008) | 2.41 in (2024) |
| May 22 | 82.6°F (2010) | 38.8°F (2022) | 0.11 in (2013) |
| May 23 | 86.0°F (2012) | 41.2°F (2025) | 0.78 in (2020) |
| May 24 | 87.6°F (2010) | 45.1°F (2013) | 1.65 in (2019) |
| May 25 | 84.9°F (2008) | 39.7°F (2017) | 1.89 in (2013) |
| May 26 | 91.9°F (2018) | 44.4°F (2023) | 1.22 in (2016) |
| May 27 | 95.4°F (2018) | 43.3°F (2021) | 1.12 in (2021) |
| May 28 | 96.3°F (2018) | 41.5°F (2021) | 1.41 in (2019) |
| May 29 | 90.3°F (2018) | 38.8°F (2021) | 0.60 in (2011) |
| May 30 | 88.9°F (2022) | 43.0°F (2021) | 2.01 in (2007) |
| May 31 | 87.6°F (2018) | 44.6°F (2012) | 0.46 in (2012) |