May weather in Alton, IN
The average temperature in Alton in May is °F (°F–°F). Average precipitation: 5.68 inches.
May is a spring month in Alton, and is cooler than the annual average of 0°F. Daylight averages about 14h 4m.
Avg High
°F
Avg Low
°F
Precipitation
5.68 in
Daylight
14h 4m
May records in Alton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 82.9°F (2012) | 39.9°F (2015) | 0.98 in (2012) |
| May 2 | 82.0°F (2012) | 41.0°F (2014) | 0.64 in (2016) |
| May 3 | 75.9°F (2013) | 48.9°F (2016) | 0.08 in (2013) |
| May 4 | 77.0°F (2013) | 45.0°F (2020) | 1.30 in (2019) |
| May 5 | 84.0°F (2012) | 44.1°F (2016) | 1.66 in (2013) |
| May 6 | 64.9°F (2018) | 39.0°F (2017) | 1.31 in (2017) |
| May 7 | 86.0°F (2012) | 54.0°F (2013) | 0.03 in (2013) |
| May 8 | 86.0°F (2014) | 51.1°F (2016) | 1.17 in (2012) |
| May 9 | 86.0°F (2015) | 28.9°F (2020) | 0.71 in (2020) |
| May 10 | 84.0°F (2018) | 53.1°F (2019) | 0.77 in (2014) |
| May 11 | 88.0°F (2015) | 35.1°F (2020) | 1.48 in (2016) |
| May 12 | 84.0°F (2015) | 41.0°F (2013) | 0.89 in (2014) |
| May 13 | 86.0°F (2014) | 37.0°F (2013) | 0.45 in (2012) |
| May 14 | 86.0°F (2014) | 45.0°F (2015) | 0.29 in (2012) |
| May 15 | 82.9°F (2013) | 37.9°F (2016) | 1.16 in (2014) |
| May 16 | 87.1°F (2015) | 46.0°F (2014) | 0.66 in (2020) |
| May 17 | 84.0°F (2012) | 39.0°F (2014) | 1.11 in (2015) |
| May 18 | 86.0°F (2017) | 46.9°F (2016) | 0.34 in (2015) |
| May 19 | 75.9°F (2013) | 55.0°F (2015) | 0.48 in (2020) |
| May 20 | 82.0°F (2017) | 54.0°F (2016) | 1.23 in (2017) |
| May 21 | 87.1°F (2012) | 55.9°F (2016) | 0.60 in (2017) |
| May 22 | 86.0°F (2018) | 46.0°F (2016) | 0.89 in (2014) |
| May 23 | 84.0°F (2019) | 61.0°F (2013) | 0.13 in (2013) |
| May 24 | 88.0°F (2019) | 46.0°F (2013) | 0.05 in (2019) |
| May 25 | 86.0°F (2015) | 55.9°F (2017) | 1.19 in (2017) |
| May 26 | 89.1°F (2012) | 54.0°F (2013) | 0.14 in (2015) |
| May 27 | 84.0°F (2019) | 64.0°F (2015) | 1.91 in (2019) |
| May 28 | 89.1°F (2018) | 62.1°F (2017) | 0.75 in (2020) |
| May 29 | 91.0°F (2012) | 64.0°F (2014) | 0.77 in (2015) |
| May 30 | 84.9°F (2015) | 57.0°F (2020) | 0.99 in (2019) |
| May 31 | 86.0°F (2013) | 57.0°F (2017) | 0.45 in (2014) |