April is one of the cooler months of the year in Waukegan, with average highs near 13.2°C and lows around 2.1°C (mean 7.7°C). It is a relatively wet time of year, averaging 90 mm of rainfall and 77% relative humidity across the period.
April is one of the cooler months of the year in Waukegan. Across 45 years of records, the warmest April in Waukegan was 2010 — when the month averaged 10.5°C — while the coldest was 2018 at 3.2°C. Typical April days reach 13.2°C with nights near 2.1°C. The long-term April temperature trend is broadly flat.
April is a relatively wet time of year in Waukegan, averaging 90 mm of rainfall. The wettest April on record was 2013 with 179 mm, while the driest was 2021 at 30 mm.
Relative humidity in Waukegan during April averages 77%. The most humid April was 1993 at 83%, and the least humid was 2000 at 72%.
April receives about 4.5 kWh/m²/day of solar energy in Waukegan. The sunniest April was 2005 at 5.1 kWh/m²/day, and the cloudiest was 1992 at 3.5.
Average wind speed in Waukegan during April is 4 m/s. The windiest April was 1981 at 4.6 m/s, while the calmest was 2021 at 3.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 7.5°C | 7.2°C | 8.3°C | 7.4°C | 7.9°C | +0.4°C |
| Avg High | 13.1°C | 12.6°C | 14.1°C | 12.9°C | 13.4°C | +0.3°C |
| Avg Low | 1.8°C | 1.8°C | 2.4°C | 1.9°C | 2.4°C | +0.6°C |
| Avg Rain | 81 mm | 98 mm | 86 mm | 98 mm | 82 mm | +1 mm |
April temperatures in Waukegan have risen by about 1°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -10.8°C (1982) to a record high of 27.7°C (2003).
Rainfall in April is a relatively wet time of year, averaging 90 mm, with a wettest year of 179 mm.
A good time to visit Waukegan
April is a good time to visit Waukegan, with days averaging 13.2°C and nights around 2.1°C (mean 7.7°C, close to Waukegan's yearly average) and higher rainfall. August and July are marginally more temperate, but April still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 14.1°C | 8.3°C | 2.4°C | 24.6°C | -5.9°C | 60 mm | 75% | 4.1 m/s | 4.3 |
| 2024 | 14.8°C | 9.4°C | 3.9°C | 24.4°C | -2.6°C | 115 mm | 77% | 4.2 m/s | 4.7 |
| 2023 | 14.6°C | 8.4°C | 2.3°C | 25.3°C | -3.3°C | 65 mm | 76% | 3.9 m/s | 4.5 |
| 2022 | 10.9°C | 5.9°C | 0.9°C | 25.3°C | -4.8°C | 121 mm | 77% | 4.4 m/s | 3.8 |
| 2021 | 14.6°C | 9.2°C | 3.7°C | 25.5°C | -5.6°C | 30 mm | 74% | 3.3 m/s | 4.8 |
| 2020 | 11.7°C | 6.4°C | 1.2°C | 22.6°C | -4.7°C | 99 mm | 81% | 3.6 m/s | 4.6 |
| 2019 | 13.0°C | 7.6°C | 2.2°C | 23.3°C | -3.4°C | 95 mm | 81% | 4 m/s | 4.3 |
| 2018 ❄️ | 8.3°C | 3.2°C | -2.0°C | 22.0°C | -8.2°C | 54 mm | 74% | 3.6 m/s | 4.9 |
| 2017 | 15.2°C | 9.6°C | 3.9°C | 24.3°C | -2.2°C | 153 mm | 79% | 4.1 m/s | 4.4 |
| 2016 | 12.0°C | 6.8°C | 1.5°C | 25.5°C | -6.2°C | 62 mm | 79% | 3.8 m/s | 4.3 |
| 2015 | 14.3°C | 8.1°C | 2.0°C | 23.4°C | -4.0°C | 81 mm | 73% | 3.8 m/s | 4.6 |
| 2014 | 12.6°C | 6.9°C | 1.1°C | 22.5°C | -5.7°C | 86 mm | 77% | 4 m/s | 4.5 |
| 2013 🌧️ | 11.8°C | 6.4°C | 1.0°C | 26.0°C | -4.7°C | 179 mm | 79% | 4.3 m/s | 4.3 |
| 2012 | 13.5°C | 8.0°C | 2.4°C | 23.3°C | -2.9°C | 74 mm | 76% | 3.9 m/s | 4.9 |
| 2011 | 12.1°C | 7.1°C | 2.0°C | 25.8°C | -2.6°C | 110 mm | 81% | 4.3 m/s | 3.7 |
| 2010 🔥 | 16.5°C | 10.5°C | 4.6°C | 24.9°C | -3.7°C | 85 mm | 77% | 4.1 m/s | 5 |
| 2009 | 12.4°C | 7.0°C | 1.6°C | 25.6°C | -3.7°C | 123 mm | 79% | 4.2 m/s | 4.3 |
| 2008 | 13.5°C | 8.0°C | 2.6°C | 22.3°C | -2.5°C | 113 mm | 80% | 3.9 m/s | 4.6 |
| 2007 | 11.8°C | 6.5°C | 1.2°C | 24.8°C | -6.8°C | 91 mm | 77% | 4.1 m/s | 4.3 |
| 2006 | 15.9°C | 9.9°C | 3.9°C | 24.4°C | -3.0°C | 94 mm | 74% | 4.2 m/s | 4.7 |
| 2005 | 15.4°C | 9.4°C | 3.3°C | 25.9°C | -0.9°C | 44 mm | 72% | 3.8 m/s | 5.1 |
| 2004 | 14.6°C | 8.4°C | 2.2°C | 25.4°C | -3.3°C | 50 mm | 75% | 4.2 m/s | 5 |
| 2003 | 14.0°C | 7.7°C | 1.4°C | 27.7°C | -5.6°C | 68 mm | 73% | 4.1 m/s | 4.5 |
| 2002 | 13.6°C | 8.2°C | 2.9°C | 27.3°C | -4.6°C | 100 mm | 78% | 4 m/s | 4.3 |
| 2001 | 16.1°C | 9.7°C | 3.3°C | 26.1°C | -4.0°C | 87 mm | 75% | 4.3 m/s | 4.8 |
| 2000 | 13.6°C | 7.7°C | 1.9°C | 22.3°C | -3.4°C | 94 mm | 72% | 3.8 m/s | 4.2 |
| 1999 | 13.7°C | 8.5°C | 3.3°C | 21.9°C | -1.4°C | 174 mm | 78% | 3.9 m/s | 4.3 |
| 1998 | 13.7°C | 8.5°C | 3.3°C | 21.9°C | -2.5°C | 110 mm | 77% | 3.6 m/s | 4.5 |
| 1997 | 11.8°C | 6.1°C | 0.4°C | 21.8°C | -6.2°C | 57 mm | 73% | 3.7 m/s | 4.6 |
| 1996 | 11.3°C | 5.9°C | 0.5°C | 22.8°C | -4.9°C | 75 mm | 74% | 3.9 m/s | 4.5 |
| 1995 | 10.5°C | 5.5°C | 0.5°C | 22.3°C | -9.5°C | 129 mm | 77% | 4.1 m/s | 3.8 |
| 1994 | 13.9°C | 7.9°C | 1.9°C | 25.4°C | -4.6°C | 64 mm | 74% | 4.5 m/s | 4.9 |
| 1993 | 10.9°C | 5.9°C | 0.9°C | 20.7°C | -7.0°C | 152 mm | 83% | 3.8 m/s | 4 |
| 1992 | 11.4°C | 6.4°C | 1.4°C | 20.9°C | -5.2°C | 65 mm | 81% | 3.6 m/s | 3.5 |
| 1991 | 14.8°C | 9.3°C | 3.8°C | 24.0°C | -3.3°C | 92 mm | 78% | 4.3 m/s | 4.3 |
| 1990 | 13.8°C | 8.1°C | 2.3°C | 25.7°C | -5.6°C | 62 mm | 74% | 4 m/s | 4.6 |
| 1989 | 12.1°C | 6.4°C | 0.7°C | 19.3°C | -5.2°C | 36 mm | 74% | 3.4 m/s | 4.4 |
| 1988 | 13.4°C | 7.2°C | 1.1°C | 22.6°C | -4.5°C | 84 mm | 74% | 3.9 m/s | 4.3 |
| 1987 | 14.5°C | 8.7°C | 2.9°C | 25.8°C | -4.2°C | 104 mm | 77% | 3.7 m/s | 4.8 |
| 1986 | 14.7°C | 8.7°C | 2.8°C | 26.3°C | -5.1°C | 50 mm | 79% | 4.1 m/s | 4.6 |
| 1985 | 15.0°C | 9.9°C | 4.9°C | 24.4°C | -5.1°C | 39 mm | 80% | 4.1 m/s | 4.6 |
| 1984 | 11.3°C | 6.6°C | 2.0°C | 24.8°C | -3.8°C | 100 mm | 81% | 4.5 m/s | 3.9 |
| 1983 | 10.4°C | 5.6°C | 0.7°C | 19.6°C | -5.5°C | 104 mm | 81% | 3.8 m/s | — |
| 1982 | 11.2°C | 5.1°C | -1.0°C | 20.0°C | -10.8°C | 91 mm | 75% | 4.3 m/s | — |
| 1981 | 15.3°C | 8.9°C | 2.5°C | 25.1°C | -4.7°C | 120 mm | 75% | 4.6 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 13.2°C with lows near 2.1°C (mean 7.7°C), based on 45 years of NASA POWER data.
April averages 90 mm of rainfall in Waukegan, a relatively wet time of year. The wettest on record was 179 mm in 2013.
The hottest April reached 27.7°C in 2003. The coldest dipped to -10.8°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 1°C. Daytime highs moved from 12.6°C to 13.8°C and overnight lows from 1.8°C to 2.6°C over the same span.
April is one of the cooler months of the year in Waukegan and a relatively wet time of year, so plan for around 13.2°C daytime highs and 2.1°C at night.
Not quite — April is the 6th coolest month in Waukegan, averaging 7.7°C.
For April in Waukegan, pack warm layers and a jacket for chilly mornings, with typical highs of 13.2°C and lows of 2.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 77% — quite humid.
Average wind speed in April is 4 m/s. The windiest April on record averaged 4.6 m/s (1981).
The wettest April on record was 2013 with 179 mm. On average, April sees 90 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Waukegan behaves each April, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for April specifically, along with year-by-year records and how the month has changed over the decades.
