Johnson County Weather in March
Average highs run from 42°F on March 1 to 57°F on March 31, and lows from 24°F to 35°F. Normal precipitation for the month is 2.21 in over about 9 wet days.
March day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
March at a glance
- Average high
- 50°F
- Average low
- 30°F
- Precipitation
- 2.21 in
- Snowfall
- 3.2 in
- Record high
- 91°FMar 21, 2026
- Record low
- -16°FMar 12, 1948
- Chance of a freeze
- 100%
- Daylight
- 11 h 16 min to 12 h 40 min
- Cloud cover
- 65%
- Humidity
- 77%
- Dew point
- 30°F
- Wind
- 12.1 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 |
|---|---|---|---|---|---|---|
| Mar 1 | 42°F | 24°F | 64°F 2020 | 3°F 2014 | 27% | 9% |
| Mar 2 | 42°F | 24°F | 65°F 2022 | -5°F 2014 | 28% | 9% |
| Mar 3 | 43°F | 24°F | 80°F 2024 | -10°F 2014 | 28% | 8% |
| Mar 4 | 43°F | 25°F | 68°F 2000 | -7°F 1952 | 28% | 8% |
| Mar 5 | 44°F | 25°F | 71°F 2009 | -8°F 1952 | 28% | 8% |
| Mar 6 | 44°F | 26°F | 73°F 2005 | 2°F 2015 | 28% | 8% |
| Mar 7 | 45°F | 26°F | 77°F 2000 | -3°F 1996 | 28% | 7% |
| Mar 8 | 45°F | 27°F | 76°F 2000 | -4°F 1996 | 28% | 7% |
| Mar 9 | 46°F | 27°F | 76°F 2026 | 0°F 2003 | 28% | 7% |
| Mar 10 | 46°F | 27°F | 75°F 2025 | 0°F 1948 | 29% | 7% |
| Mar 11 | 47°F | 28°F | 74°F 2024 | -12°F 1948 | 29% | 6% |
| Mar 12 | 48°F | 28°F | 71°F 2024 | -16°F 1948 | 29% | 6% |
| Mar 13 | 48°F | 29°F | 76°F 2007 | -1°F 1948 | 29% | 6% |
| Mar 14 | 49°F | 29°F | 83°F 2025 | 12°F 1950 | 29% | 6% |
| Mar 15 | 49°F | 29°F | 79°F 2012 | 9°F 1997 | 30% | 5% |
| Mar 16 | 50°F | 30°F | 82°F 2012 | -1°F 1951 | 30% | 5% |
| Mar 17 | 50°F | 30°F | 83°F 2012 | 6°F 1949 | 30% | 5% |
| Mar 18 | 51°F | 30°F | 82°F 2012 | 10°F 2023 | 30% | 5% |
| Mar 19 | 51°F | 31°F | 81°F 2012 | 6°F 1951 | 31% | 5% |
| Mar 20 | 52°F | 31°F | 79°F 2026 | 4°F 1951 | 31% | 4% |
| Mar 21 | 52°F | 32°F | 91°F 2026 | -2°F 1951 | 31% | 4% |
| Mar 22 | 53°F | 32°F | 72°F 2026 | 13°F 2002 | 31% | 4% |
| Mar 23 | 53°F | 32°F | 70°F 2003 | 17°F 2014 | 32% | 4% |
| Mar 24 | 54°F | 33°F | 76°F 2017 | 10°F 1951 | 32% | 4% |
| Mar 25 | 54°F | 33°F | 80°F 2007 | 14°F 1996 | 32% | 3% |
| Mar 26 | 55°F | 33°F | 78°F 2007 | 13°F 1996 | 32% | 3% |
| Mar 27 | 55°F | 34°F | 77°F 2012 | 16°F 1996 | 33% | 3% |
| Mar 28 | 56°F | 34°F | 81°F 2025 | 17°F 2026 | 33% | 3% |
| Mar 29 | 56°F | 34°F | 81°F 1998 | 23°F 1953 | 33% | 3% |
| Mar 30 | 57°F | 35°F | 86°F 2026 | 18°F 2003 | 34% | 2% |
| Mar 31 | 57°F | 35°F | 78°F 2010 | 20°F 2003 | 34% | 2% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- March 1
- sunrise 6:41 AM, sunset 5:57 PM
- March 31
- sunrise 6:51 AM, sunset 7:31 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.