May weather in Riverside, IL
The average temperature in Riverside in May is 61.5°F (52.0°F–71.1°F). Average precipitation: 4.09 inches.
May is a spring month in Riverside, and is warmer than the annual average of 52.1°F. Daily temperatures swing about 19.1°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 22m. For travel, May is a comfortable month to visit.
Avg High
71.1°F
Avg Low
52.0°F
Precipitation
4.09 in
Daylight
14h 22m
May records in Riverside
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 86.0°F (2018) | 36.0°F (1997) | 1.01 in (2003) |
| May 2 | 88.0°F (2018) | 35.1°F (2005) | 1.01 in (2024) |
| May 3 | 87.1°F (2001) | 33.1°F (2004) | 1.12 in (2022) |
| May 4 | 82.9°F (1999) | 37.0°F (2005) | 1.08 in (2003) |
| May 5 | 84.9°F (2000) | 18.0°F (1998) | 0.79 in (2015) |
| May 6 | 87.1°F (2000) | 16.0°F (1998) | 0.86 in (2009) |
| May 7 | 87.1°F (2015) | 37.9°F (2017) | 2.14 in (1998) |
| May 8 | 93.0°F (2014) | 34.0°F (2020) | 0.83 in (2000) |
| May 9 | 88.0°F (2004) | 31.1°F (2020) | 1.43 in (2014) |
| May 10 | 91.9°F (2022) | 37.0°F (2020) | 0.82 in (2017) |
| May 11 | 91.0°F (2022) | 37.0°F (2021) | 1.61 in (2002) |
| May 12 | 95.0°F (2022) | 36.0°F (2006) | 1.03 in (2016) |
| May 13 | 93.0°F (2022) | 37.9°F (2013) | 1.03 in (2009) |
| May 14 | 90.0°F (2007) | 41.0°F (2006) | 1.74 in (2020) |
| May 15 | 95.0°F (2025) | 37.9°F (2016) | 0.70 in (2009) |
| May 16 | 91.0°F (2001) | 37.0°F (1997) | 0.53 in (2020) |
| May 17 | 87.1°F (1998) | 37.0°F (2002) | 3.67 in (2020) |
| May 18 | 91.9°F (1998) | 34.0°F (2002) | 0.52 in (2000) |
| May 19 | 91.0°F (1998) | 41.0°F (2002) | 0.58 in (2005) |
| May 20 | 91.9°F (2012) | 37.0°F (2002) | 1.25 in (2013) |
| May 21 | 91.0°F (2024) | 34.0°F (2002) | 1.23 in (2018) |
| May 22 | 88.0°F (2011) | 39.0°F (1997) | 0.65 in (2013) |
| May 23 | 89.1°F (2007) | 43.0°F (1997) | 0.44 in (1999) |
| May 24 | 91.0°F (2010) | 42.1°F (2013) | 0.83 in (1998) |
| May 25 | 90.0°F (2016) | 44.1°F (2002) | 1.90 in (2011) |
| May 26 | 90.0°F (2014) | 42.1°F (2002) | 1.38 in (2009) |
| May 27 | 97.0°F (2012) | 42.1°F (2011) | 1.38 in (2000) |
| May 28 | 96.1°F (2018) | 45.0°F (2008) | 2.20 in (2013) |
| May 29 | 91.9°F (2006) | 45.0°F (2008) | 0.92 in (2011) |
| May 30 | 91.9°F (2022) | 41.0°F (2021) | 1.50 in (2004) |
| May 31 | 91.0°F (2023) | 44.1°F (2003) | 1.57 in (2010) |