April is close to Rockford's year-round average, with average highs near 13.8°C and lows around 1.8°C (mean 7.8°C). It is a relatively wet time of year, averaging 89 mm of rainfall and 76% relative humidity across the period.
April is close to Rockford's year-round average. Across 45 years of records, the warmest April in Rockford was 2010 — when the month averaged 11°C — while the coldest was 2018 at 3°C. Typical April days reach 13.8°C with nights near 1.8°C. The long-term April temperature trend is broadly flat.
April is a relatively wet time of year in Rockford, averaging 89 mm of rainfall. The wettest April on record was 2013 with 181 mm, while the driest was 2021 at 32 mm.
Relative humidity in Rockford during April averages 76%. The most humid April was 1993 at 83%, and the least humid was 2000 at 70%.
April receives about 4.7 kWh/m²/day of solar energy in Rockford. The sunniest Aprils were 2004, 2005 and 2015, among others at 5.2 kWh/m²/day, and the cloudiest was 2011 at 3.8.
Average wind speed in Rockford during April is 3.8 m/s. The windiest April was 1981 at 4.4 m/s, while the calmest were 1989 and 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 | 7.6°C | 7.3°C | 8.5°C | 7.6°C | 8.0°C | +0.4°C |
| Avg High | 13.6°C | 13.1°C | 14.8°C | 13.5°C | 13.9°C | +0.3°C |
| Avg Low | 1.5°C | 1.5°C | 2.2°C | 1.7°C | 2.1°C | +0.6°C |
| Avg Rain | 78 mm | 96 mm | 88 mm | 99 mm | 81 mm | +3 mm |
April temperatures in Rockford have risen by about 1°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -12.6°C (1982) to a record high of 28.2°C (2003).
Rainfall in April is a relatively wet time of year, averaging 89 mm, with a wettest year of 181 mm.
A good time to visit Rockford
April is a good time to visit Rockford, with days averaging 13.8°C and nights around 1.8°C (mean 7.8°C, close to Rockford's yearly average) and higher rainfall. July and August 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 | 15.0°C | 8.6°C | 2.2°C | 25.2°C | -6.4°C | 61 mm | 74% | 4 m/s | 4.6 |
| 2024 | 15.1°C | 9.3°C | 3.6°C | 25.1°C | -3.5°C | 113 mm | 77% | 4.1 m/s | 4.7 |
| 2023 | 15.0°C | 8.4°C | 1.9°C | 25.8°C | -4.2°C | 65 mm | 76% | 3.8 m/s | 4.8 |
| 2022 | 11.4°C | 5.9°C | 0.4°C | 26.0°C | -5.9°C | 119 mm | 76% | 4.3 m/s | 4.2 |
| 2021 | 14.9°C | 9.3°C | 3.6°C | 25.6°C | -6.1°C | 32 mm | 74% | 3.3 m/s | 4.9 |
| 2020 | 12.1°C | 6.4°C | 0.7°C | 23.1°C | -5.5°C | 96 mm | 81% | 3.5 m/s | 5 |
| 2019 | 13.1°C | 7.5°C | 1.9°C | 23.7°C | -3.8°C | 96 mm | 82% | 3.8 m/s | 4.3 |
| 2018 ❄️ | 8.5°C | 3.0°C | -2.6°C | 23.1°C | -10.5°C | 53 mm | 74% | 3.5 m/s | 4.9 |
| 2017 | 15.7°C | 9.8°C | 3.9°C | 24.6°C | -2.8°C | 152 mm | 79% | 3.9 m/s | 4.4 |
| 2016 | 12.9°C | 7.2°C | 1.4°C | 25.9°C | -6.7°C | 62 mm | 79% | 3.7 m/s | 4.5 |
| 2015 | 15.3°C | 8.6°C | 1.9°C | 23.5°C | -4.3°C | 83 mm | 71% | 3.7 m/s | 5.2 |
| 2014 | 13.0°C | 7.0°C | 1.0°C | 22.7°C | -6.3°C | 91 mm | 77% | 4 m/s | 4.6 |
| 2013 🌧️ | 12.1°C | 6.3°C | 0.6°C | 26.8°C | -5.2°C | 181 mm | 79% | 4.1 m/s | 4.5 |
| 2012 | 14.5°C | 8.3°C | 2.2°C | 24.2°C | -3.5°C | 74 mm | 75% | 3.8 m/s | 4.9 |
| 2011 | 12.6°C | 7.2°C | 1.8°C | 26.6°C | -3.4°C | 108 mm | 82% | 4.2 m/s | 3.8 |
| 2010 🔥 | 17.5°C | 11.0°C | 4.5°C | 25.3°C | -3.9°C | 92 mm | 76% | 3.9 m/s | 5 |
| 2009 | 13.0°C | 7.0°C | 1.0°C | 26.0°C | -3.6°C | 119 mm | 79% | 3.9 m/s | 4.8 |
| 2008 | 13.7°C | 7.9°C | 2.2°C | 22.6°C | -2.9°C | 124 mm | 81% | 3.8 m/s | 4.4 |
| 2007 | 12.0°C | 6.5°C | 1.0°C | 25.6°C | -7.4°C | 94 mm | 77% | 4 m/s | 4.7 |
| 2006 | 16.6°C | 10.2°C | 3.8°C | 25.5°C | -5.0°C | 103 mm | 73% | 4.1 m/s | 4.9 |
| 2005 | 16.5°C | 9.9°C | 3.3°C | 26.3°C | -1.4°C | 44 mm | 71% | 3.6 m/s | 5.2 |
| 2004 | 15.2°C | 8.6°C | 2.0°C | 25.7°C | -3.9°C | 52 mm | 75% | 4 m/s | 5.2 |
| 2003 | 15.2°C | 8.2°C | 1.2°C | 28.2°C | -6.5°C | 68 mm | 71% | 4 m/s | 4.5 |
| 2002 | 14.0°C | 8.3°C | 2.7°C | 27.6°C | -5.2°C | 100 mm | 78% | 3.8 m/s | 4.3 |
| 2001 | 16.9°C | 10.0°C | 3.1°C | 26.3°C | -4.7°C | 88 mm | 75% | 4.3 m/s | 5.1 |
| 2000 | 14.4°C | 7.9°C | 1.4°C | 22.9°C | -4.2°C | 91 mm | 70% | 3.6 m/s | 4.5 |
| 1999 | 14.5°C | 8.7°C | 2.9°C | 22.8°C | -1.8°C | 173 mm | 78% | 3.8 m/s | 4.2 |
| 1998 | 14.4°C | 8.7°C | 2.9°C | 23.1°C | -3.3°C | 111 mm | 76% | 3.5 m/s | 4.6 |
| 1997 | 12.2°C | 6.2°C | 0.2°C | 22.1°C | -7.2°C | 56 mm | 73% | 3.4 m/s | 4.8 |
| 1996 | 12.2°C | 6.1°C | 0.1°C | 23.5°C | -5.3°C | 74 mm | 73% | 3.8 m/s | 5.1 |
| 1995 | 11.1°C | 5.6°C | 0.1°C | 22.5°C | -10.3°C | 122 mm | 76% | 4 m/s | 4.1 |
| 1994 | 14.1°C | 7.9°C | 1.6°C | 25.4°C | -4.8°C | 59 mm | 74% | 4.2 m/s | 5.1 |
| 1993 | 11.0°C | 5.7°C | 0.4°C | 19.6°C | -8.0°C | 146 mm | 83% | 3.6 m/s | 4.2 |
| 1992 | 12.0°C | 6.5°C | 1.1°C | 21.4°C | -5.4°C | 70 mm | 81% | 3.5 m/s | 3.9 |
| 1991 | 15.6°C | 9.5°C | 3.4°C | 24.7°C | -4.1°C | 87 mm | 77% | 4.1 m/s | 4.4 |
| 1990 | 14.1°C | 8.1°C | 2.1°C | 26.2°C | -6.2°C | 65 mm | 73% | 3.8 m/s | 4.8 |
| 1989 | 13.0°C | 6.7°C | 0.5°C | 22.8°C | -5.7°C | 37 mm | 73% | 3.3 m/s | 4.8 |
| 1988 | 13.8°C | 7.2°C | 0.5°C | 23.0°C | -5.0°C | 82 mm | 75% | 3.7 m/s | 4.8 |
| 1987 | 15.4°C | 9.0°C | 2.6°C | 26.9°C | -4.9°C | 96 mm | 76% | 3.4 m/s | 5 |
| 1986 | 15.2°C | 8.8°C | 2.5°C | 26.7°C | -5.8°C | 52 mm | 79% | 4 m/s | 4.8 |
| 1985 | 15.5°C | 10.1°C | 4.7°C | 25.1°C | -5.3°C | 37 mm | 80% | 3.9 m/s | 5.2 |
| 1984 | 11.9°C | 6.8°C | 1.7°C | 25.7°C | -4.1°C | 94 mm | 79% | 4.3 m/s | 4.4 |
| 1983 | 10.5°C | 5.5°C | 0.5°C | 20.9°C | -6.1°C | 90 mm | 81% | 3.7 m/s | — |
| 1982 | 11.4°C | 5.0°C | -1.5°C | 20.7°C | -12.6°C | 91 mm | 76% | 4.1 m/s | — |
| 1981 | 16.1°C | 9.1°C | 2.1°C | 25.3°C | -5.2°C | 122 mm | 75% | 4.4 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 13.8°C with lows near 1.8°C (mean 7.8°C), based on 45 years of NASA POWER data.
April averages 89 mm of rainfall in Rockford, a relatively wet time of year. The wettest on record was 181 mm in 2013.
The hottest April reached 28.2°C in 2003. The coldest dipped to -12.6°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 13.1°C to 14.3°C and overnight lows from 1.5°C to 2.3°C over the same span.
April is close to Rockford's year-round average and a relatively wet time of year, so plan for around 13.8°C daytime highs and 1.8°C at night.
Not quite — April is the 6th coolest month in Rockford, averaging 7.8°C.
For April in Rockford, pack warm layers and a jacket for chilly mornings, with typical highs of 13.8°C and lows of 1.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 76% — quite humid.
Average wind speed in April is 3.8 m/s. The windiest April on record averaged 4.4 m/s (1981).
The wettest April on record was 2013 with 181 mm. On average, April sees 89 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 Rockford 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.
