Johnson County Weather in April
Average highs run from 57°F on April 1 to 68°F on April 30, and lows from 35°F to 45°F. Normal precipitation for the month is 3.76 in over about 11 wet days.
April day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
April at a glance
- Average high
- 63°F
- Average low
- 40°F
- Precipitation
- 3.76 in
- Snowfall
- 0.5 in
- Record high
- 92°FApr 29, 1952
- Record low
- 15°FApr 2, 2018
- Chance of a freeze
- 96%
- Daylight
- 12 h 43 min to 14 h 00 min
- Cloud cover
- 65%
- Humidity
- 74%
- Dew point
- 41°F
- Wind
- 12.3 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Apr 1 | 57°F | 35°F | 86°F 2003 | 21°F 2018 | 34% | 2% |
| Apr 2 | 58°F | 36°F | 81°F 2003 | 15°F 2018 | 35% | 2% |
| Apr 3 | 58°F | 36°F | 82°F 2011 | 20°F 2013 | 35% | 2% |
| Apr 4 | 59°F | 36°F | 83°F 2005 | 16°F 2018 | 35% | 2% |
| Apr 5 | 59°F | 37°F | 83°F 2000 | 20°F 2002 | 35% | 2% |
| Apr 6 | 59°F | 37°F | 80°F 2021 | 19°F 1950 | 36% | 2% |
| Apr 7 | 60°F | 37°F | 80°F 2020 | 16°F 2018 | 36% | 2% |
| Apr 8 | 60°F | 38°F | 82°F 2001 | 17°F 2018 | 36% | 2% |
| Apr 9 | 60°F | 38°F | 79°F 2017 | 17°F 1997 | 36% | 1% |
| Apr 10 | 61°F | 38°F | 85°F 2011 | 22°F 2018 | 37% | 1% |
| Apr 11 | 61°F | 39°F | 84°F 1996 | 24°F 2004 | 37% | 1% |
| Apr 12 | 62°F | 39°F | 83°F 2014 | 24°F 2000 | 37% | 1% |
| Apr 13 | 62°F | 39°F | 88°F 2006 | 20°F 1950 | 37% | 1% |
| Apr 14 | 62°F | 40°F | 87°F 2003 | 21°F 1950 | 37% | 1% |
| Apr 15 | 63°F | 40°F | 87°F 2002 | 22°F 1950 | 38% | 1% |
| Apr 16 | 63°F | 40°F | 87°F 2004 | 17°F 1949 | 38% | 1% |
| Apr 17 | 63°F | 41°F | 85°F 2004 | 19°F 1951 | 38% | 1% |
| Apr 18 | 64°F | 41°F | 86°F 1948 | 24°F 1953 | 38% | 1% |
| Apr 19 | 64°F | 41°F | 80°F 1948 | 25°F 1953 | 39% | 1% |
| Apr 20 | 64°F | 42°F | 82°F 2001 | 24°F 2013 | 39% | 1% |
| Apr 21 | 65°F | 42°F | 84°F 2019 | 23°F 1950 | 39% | 1% |
| Apr 22 | 65°F | 42°F | 83°F 1950 | 29°F 2021 | 39% | 1% |
| Apr 23 | 65°F | 43°F | 84°F 2022 | 27°F 1951 | 39% | 1% |
| Apr 24 | 66°F | 43°F | 85°F 2009 | 26°F 2023 | 39% | 1% |
| Apr 25 | 66°F | 43°F | 86°F 1949 | 32°F 1997 | 39% | 1% |
| Apr 26 | 66°F | 44°F | 85°F 2021 | 28°F 2022 | 40% | 0% |
| Apr 27 | 67°F | 44°F | 86°F 2021 | 27°F 1953 | 40% | 0% |
| Apr 28 | 67°F | 45°F | 86°F 2004 | 27°F 1950 | 40% | 0% |
| Apr 29 | 67°F | 45°F | 92°F 1952 | 30°F 2011 | 40% | 0% |
| Apr 30 | 68°F | 45°F | 89°F 1952 | 31°F 2005 | 40% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- April 1
- sunrise 6:49 AM, sunset 7:32 PM
- April 30
- sunrise 6:04 AM, sunset 8:04 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00014937 (Iowa City Muni AP), public domain. Records: NOAA GHCN-Daily, station USW00014937, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.