May weather in Round Lake Park, IL
The average temperature in Round Lake Park in May is 57.7°F (47.4°F–68.0°F). Average precipitation: 4.57 inches.
May is a spring month in Round Lake Park, and is warmer than the annual average of 47.9°F. Daily temperatures swing about 20.6°F between overnight low and afternoon high. Expect about 14 days with precipitation. Daylight averages about 14h 25m. For travel, May is a comfortable month to visit.
Avg High
68.0°F
Avg Low
47.4°F
Precipitation
4.57 in
Daylight
14h 25m
May records in Round Lake Park
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 86.0°F (2001) | 33.1°F (2020) | 1.80 in (2003) |
| May 2 | 84.0°F (2018) | 32.0°F (2005) | 0.81 in (2016) |
| May 3 | 84.9°F (2018) | 27.0°F (2004) | 0.91 in (2018) |
| May 4 | 84.9°F (2001) | 30.9°F (2002) | 0.87 in (2022) |
| May 5 | 81.0°F (2000) | 34.0°F (2021) | 1.35 in (2003) |
| May 6 | 84.9°F (2000) | 35.1°F (2006) | 0.22 in (2022) |
| May 7 | 86.0°F (2000) | 32.0°F (2017) | 0.59 in (2009) |
| May 8 | 82.9°F (2015) | 30.0°F (2021) | 0.52 in (2024) |
| May 9 | 87.1°F (2014) | 25.0°F (2020) | 2.13 in (2019) |
| May 10 | 87.1°F (2004) | 30.9°F (2020) | 0.82 in (2000) |
| May 11 | 89.1°F (2022) | 28.9°F (2021) | 1.48 in (2001) |
| May 12 | 91.0°F (2022) | 28.9°F (2021) | 1.72 in (2002) |
| May 13 | 90.0°F (2022) | 30.0°F (2013) | 3.30 in (2010) |
| May 14 | 89.1°F (2022) | 36.0°F (2013) | 0.92 in (2020) |
| May 15 | 88.0°F (2007) | 30.0°F (2016) | 1.94 in (2020) |
| May 16 | 89.1°F (2001) | 33.1°F (2014) | 0.62 in (2007) |
| May 17 | 87.1°F (2001) | 32.0°F (2014) | 0.87 in (2020) |
| May 18 | 86.0°F (2001) | 30.9°F (2002) | 1.72 in (2004) |
| May 19 | 82.0°F (2012) | 35.1°F (2008) | 1.97 in (2000) |
| May 20 | 89.1°F (2012) | 34.0°F (2015) | 0.53 in (2005) |
| May 21 | 89.1°F (2012) | 28.9°F (2002) | 0.71 in (2018) |
| May 22 | 84.9°F (2014) | 35.1°F (2006) | 2.15 in (2004) |
| May 23 | 86.0°F (2011) | 37.9°F (2022) | 2.26 in (2011) |
| May 24 | 88.0°F (2010) | 33.1°F (2013) | 1.06 in (2020) |
| May 25 | 91.0°F (2010) | 36.0°F (2013) | 0.54 in (2006) |
| May 26 | 86.0°F (2018) | 35.1°F (2023) | 1.62 in (2011) |
| May 27 | 89.1°F (2018) | 37.9°F (2011) | 1.40 in (2009) |
| May 28 | 93.9°F (2018) | 39.0°F (2008) | 0.36 in (2014) |
| May 29 | 91.9°F (2018) | 36.0°F (2008) | 0.63 in (2003) |
| May 30 | 89.1°F (2006) | 34.0°F (2021) | 1.08 in (2011) |
| May 31 | 88.0°F (2010) | 39.0°F (2001) | 1.20 in (2004) |