May weather in Lockport, IL
The average temperature in Lockport in May is 61.4°F (50.3°F–72.4°F). Average precipitation: 4.81 inches.
May is a spring month in Lockport, and is warmer than the annual average of 50.9°F. Daily temperatures swing about 22.1°F between overnight low and afternoon high. Expect about 14 days with precipitation. Daylight averages about 14h 21m. For travel, May is a comfortable month to visit.
Avg High
72.4°F
Avg Low
50.3°F
Precipitation
4.81 in
Daylight
14h 21m
May records in Lockport
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 84.9°F (2001) | 32.0°F (2005) | 0.90 in (2019) |
| May 2 | 86.0°F (2018) | 32.0°F (2005) | 0.62 in (2008) |
| May 3 | 86.0°F (2001) | 26.1°F (2005) | 1.40 in (2022) |
| May 4 | 82.0°F (1999) | 35.1°F (2005) | 1.07 in (2003) |
| May 5 | 84.0°F (2000) | 39.0°F (2011) | 0.78 in (2015) |
| May 6 | 86.0°F (2000) | 36.0°F (2020) | 1.74 in (1998) |
| May 7 | 88.0°F (2001) | 36.0°F (2017) | 1.65 in (1998) |
| May 8 | 89.1°F (2014) | 30.0°F (2020) | 0.78 in (2021) |
| May 9 | 87.1°F (2004) | 28.0°F (2020) | 1.69 in (2024) |
| May 10 | 91.0°F (2011) | 37.0°F (2020) | 0.87 in (2017) |
| May 11 | 93.0°F (2022) | 37.0°F (2021) | 2.71 in (2002) |
| May 12 | 91.9°F (2022) | 36.0°F (2013) | 1.53 in (2018) |
| May 13 | 90.0°F (2022) | 34.0°F (2013) | 1.12 in (2009) |
| May 14 | 91.0°F (2007) | 37.9°F (2000) | 1.79 in (2020) |
| May 15 | 97.0°F (2025) | 35.1°F (2016) | 1.60 in (2009) |
| May 16 | 90.0°F (2001) | 37.0°F (2005) | 1.04 in (2019) |
| May 17 | 88.0°F (1998) | 35.1°F (2002) | 2.64 in (2020) |
| May 18 | 93.0°F (1998) | 30.9°F (2002) | 1.22 in (2000) |
| May 19 | 91.0°F (1998) | 39.0°F (2002) | 1.36 in (2005) |
| May 20 | 91.0°F (2012) | 35.1°F (2002) | 0.94 in (2013) |
| May 21 | 89.1°F (2024) | 32.0°F (2002) | 1.08 in (2018) |
| May 22 | 88.0°F (2007) | 37.9°F (2006) | 0.37 in (2019) |
| May 23 | 90.0°F (2007) | 42.1°F (2006) | 0.97 in (2020) |
| May 24 | 91.9°F (2010) | 37.9°F (2013) | 0.68 in (2015) |
| May 25 | 89.1°F (2016) | 42.1°F (1999) | 2.31 in (2011) |
| May 26 | 91.0°F (2012) | 39.0°F (2002) | 2.19 in (2009) |
| May 27 | 96.1°F (2012) | 41.0°F (2011) | 1.63 in (2019) |
| May 28 | 93.9°F (2018) | 42.1°F (2008) | 1.16 in (2013) |
| May 29 | 91.9°F (2006) | 42.1°F (2021) | 0.67 in (2006) |
| May 30 | 90.0°F (2010) | 41.0°F (2021) | 1.82 in (2004) |
| May 31 | 88.0°F (2002) | 43.0°F (2003) | 1.61 in (2000) |