April weather in Winthrop Harbor, IL
The average temperature in Winthrop Harbor in April is 45.8°F (36.0°F–55.5°F). Average precipitation: 3.77 inches.
April is a spring month in Winthrop Harbor, and is cooler than the annual average of 48.3°F. Daily temperatures swing about 19.5°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 13h 10m. For travel, April is cool.
Avg High
55.5°F
Avg Low
36.0°F
Precipitation
3.77 in
Daylight
13h 10m
April records in Winthrop Harbor
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| April 1 | 84.0°F (2010) | 20.1°F (2021) | 0.24 in (2024) |
| April 2 | 81.0°F (2010) | 18.1°F (2018) | 1.88 in (2026) |
| April 3 | 71.1°F (2016) | 21.2°F (2013) | 0.48 in (2017) |
| April 4 | 75.9°F (2010) | 23.2°F (2016) | 0.79 in (2003) |
| April 5 | 75.9°F (2005) | 19.2°F (2016) | 0.67 in (2017) |
| April 6 | 81.0°F (2021) | 21.2°F (2007) | 0.81 in (2016) |
| April 7 | 82.0°F (2001) | 17.2°F (2018) | 0.53 in (2000) |
| April 8 | 73.0°F (2001) | 17.2°F (2018) | 1.06 in (2002) |
| April 9 | 75.0°F (2017) | 21.0°F (2003) | 2.55 in (2015) |
| April 10 | 84.0°F (2011) | 23.0°F (2003) | 1.64 in (2008) |
| April 11 | 79.0°F (2023) | 27.0°F (2004) | 0.98 in (2007) |
| April 12 | 82.0°F (2023) | 28.0°F (2000) | 0.36 in (2020) |
| April 13 | 82.9°F (2023) | 27.0°F (2003) | 0.72 in (2014) |
| April 14 | 84.9°F (2003) | 25.0°F (2004) | 1.48 in (2026) |
| April 15 | 88.0°F (2002) | 21.2°F (2014) | 1.93 in (2012) |
| April 16 | 87.1°F (2002) | 22.1°F (2014) | 0.38 in (2017) |
| April 17 | 84.0°F (2002) | 25.2°F (2022) | 2.21 in (2013) |
| April 18 | 89.1°F (2002) | 23.2°F (2018) | 1.93 in (2013) |
| April 19 | 80.1°F (2005) | 30.0°F (2026) | 1.00 in (2000) |
| April 20 | 79.0°F (2023) | 27.1°F (2018) | 2.20 in (2000) |
| April 21 | 82.0°F (2001) | 28.2°F (2018) | 0.24 in (2001) |
| April 22 | 81.0°F (2007) | 26.2°F (2021) | 1.43 in (2022) |
| April 23 | 82.9°F (2022) | 24.1°F (2003) | 0.67 in (2013) |
| April 24 | 84.0°F (2009) | 25.2°F (2015) | 0.57 in (2010) |
| April 25 | 82.0°F (2016) | 27.1°F (2024) | 0.92 in (2009) |
| April 26 | 77.0°F (2001) | 27.1°F (2006) | 0.97 in (2011) |
| April 27 | 82.0°F (2021) | 28.2°F (2022) | 0.57 in (2024) |
| April 28 | 84.0°F (2025) | 28.2°F (2018) | 1.32 in (2020) |
| April 29 | 82.0°F (2007) | 22.1°F (2018) | 1.81 in (2020) |
| April 30 | 84.0°F (2001) | 26.2°F (2008) | 0.92 in (2003) |