May weather in South Jacksonville, IL
The average temperature in South Jacksonville in May is 63.8°F (52.6°F–75.0°F). Average precipitation: 5.09 inches.
May is a spring month in South Jacksonville, and is warmer than the annual average of 52.8°F. Daily temperatures swing about 22.4°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 11m. For travel, May is a wet month.
Avg High
75.0°F
Avg Low
52.6°F
Precipitation
5.09 in
Daylight
14h 11m
May records in South Jacksonville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 89.1°F (2007) | 35.1°F (2015) | 2.83 in (2019) |
| May 2 | 86.0°F (2018) | 37.0°F (2015) | 0.83 in (2019) |
| May 3 | 88.0°F (2018) | 41.0°F (2011) | 1.02 in (2022) |
| May 4 | 84.0°F (2012) | 32.0°F (2011) | 2.08 in (2013) |
| May 5 | 84.0°F (2015) | 36.0°F (2011) | 0.62 in (2007) |
| May 6 | 87.1°F (2012) | 37.9°F (2020) | 1.07 in (2022) |
| May 7 | 90.0°F (2012) | 41.0°F (2020) | 0.48 in (2024) |
| May 8 | 89.1°F (2023) | 41.0°F (2021) | 0.83 in (2015) |
| May 9 | 88.0°F (2014) | 32.0°F (2020) | 0.97 in (2015) |
| May 10 | 88.0°F (2017) | 33.1°F (2020) | 1.16 in (2013) |
| May 11 | 90.0°F (2011) | 39.9°F (2021) | 1.53 in (2010) |
| May 12 | 93.0°F (2022) | 36.0°F (2021) | 1.10 in (2005) |
| May 13 | 91.9°F (2022) | 36.0°F (2021) | 0.41 in (2014) |
| May 14 | 91.0°F (2022) | 39.0°F (2021) | 1.72 in (2009) |
| May 15 | 91.0°F (2007) | 41.0°F (2016) | 1.40 in (2023) |
| May 16 | 90.0°F (2013) | 37.0°F (2008) | 0.78 in (2009) |
| May 17 | 88.0°F (2017) | 36.0°F (2014) | 2.16 in (2020) |
| May 18 | 88.0°F (2019) | 39.0°F (2007) | 1.06 in (2021) |
| May 19 | 88.0°F (2017) | 42.1°F (2007) | 1.57 in (2017) |
| May 20 | 90.0°F (2012) | 43.0°F (2015) | 1.28 in (2017) |
| May 21 | 89.1°F (2012) | 39.9°F (2015) | 1.48 in (2018) |
| May 22 | 90.0°F (2024) | 42.1°F (2015) | 1.41 in (2019) |
| May 23 | 87.1°F (2007) | 43.0°F (2022) | 1.25 in (2019) |
| May 24 | 91.0°F (2010) | 44.1°F (2013) | 0.70 in (2004) |
| May 25 | 91.0°F (2010) | 43.0°F (2013) | 1.10 in (2024) |
| May 26 | 89.1°F (2018) | 45.0°F (2023) | 1.28 in (2011) |
| May 27 | 93.0°F (2012) | 46.9°F (2023) | 1.26 in (2018) |
| May 28 | 96.1°F (2018) | 46.0°F (2008) | 1.27 in (2021) |
| May 29 | 95.0°F (2006) | 45.0°F (2021) | 0.99 in (2007) |
| May 30 | 93.9°F (2006) | 43.0°F (2021) | 1.48 in (2015) |
| May 31 | 91.9°F (2011) | 46.9°F (2021) | 1.65 in (2008) |