Johnson County Weather in January
Average highs run from 32°F on January 1 to 31°F on January 31, and lows from 16°F to 15°F. Normal precipitation for the month is 1.04 in over about 6 wet days.
January day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
January at a glance
- Average high
- 31°F
- Average low
- 15°F
- Precipitation
- 1.04 in
- Snowfall
- 7.6 in
- Record high
- 65°FJan 8, 2003
- Record low
- -28°FJan 31, 1996
- Chance of a freeze
- 100%
- Daylight
- 9 h 14 min to 10 h 02 min
- Cloud cover
- 65%
- Humidity
- 86%
- Dew point
- 17°F
- Wind
- 11.6 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 |
|---|---|---|---|---|---|---|
| Jan 1 | 32°F | 16°F | 51°F 2004 | -20°F 2018 | 24% | 13% |
| Jan 2 | 32°F | 16°F | 56°F 2004 | -20°F 2018 | 24% | 13% |
| Jan 3 | 32°F | 16°F | 55°F 1998 | -14°F 2014 | 24% | 13% |
| Jan 4 | 31°F | 16°F | 58°F 1997 | -18°F 1999 | 24% | 13% |
| Jan 5 | 31°F | 15°F | 61°F 2012 | -23°F 1999 | 23% | 13% |
| Jan 6 | 31°F | 15°F | 57°F 2012 | -15°F 2014 | 23% | 13% |
| Jan 7 | 31°F | 15°F | 56°F 2008 | -15°F 1951 | 23% | 13% |
| Jan 8 | 31°F | 15°F | 65°F 2003 | -14°F 2015 | 23% | 14% |
| Jan 9 | 31°F | 15°F | 60°F 2020 | -14°F 1999 | 23% | 14% |
| Jan 10 | 31°F | 15°F | 55°F 2012 | -15°F 2010 | 23% | 14% |
| Jan 11 | 31°F | 15°F | 55°F 2012 | -7°F 1997 | 23% | 14% |
| Jan 12 | 31°F | 15°F | 55°F 2006 | -10°F 1997 | 22% | 14% |
| Jan 13 | 31°F | 14°F | 51°F 1996 | -10°F 2024 | 22% | 14% |
| Jan 14 | 31°F | 14°F | 55°F 1952 | -16°F 2024 | 22% | 14% |
| Jan 15 | 31°F | 14°F | 58°F 1953 | -21°F 2009 | 22% | 14% |
| Jan 16 | 31°F | 14°F | 56°F 2023 | -25°F 2009 | 22% | 14% |
| Jan 17 | 31°F | 14°F | 56°F 1996 | -13°F 1997 | 22% | 14% |
| Jan 18 | 31°F | 14°F | 56°F 1996 | -7°F 1997 | 22% | 14% |
| Jan 19 | 31°F | 14°F | 56°F 1951 | -19°F 1949 | 22% | 14% |
| Jan 20 | 31°F | 14°F | 47°F 2018 | -21°F 1949 | 22% | 14% |
| Jan 21 | 31°F | 14°F | 51°F 1997 | -13°F 2024 | 22% | 14% |
| Jan 22 | 31°F | 14°F | 58°F 2002 | -14°F 1949 | 22% | 13% |
| Jan 23 | 31°F | 14°F | 47°F 2002 | -13°F 2026 | 22% | 13% |
| Jan 24 | 31°F | 14°F | 50°F 1950 | -13°F 2008 | 22% | 13% |
| Jan 25 | 31°F | 14°F | 56°F 2002 | -14°F 2019 | 22% | 13% |
| Jan 26 | 31°F | 14°F | 61°F 2002 | -13°F 2019 | 22% | 13% |
| Jan 27 | 31°F | 14°F | 63°F 2002 | -11°F 1996 | 23% | 13% |
| Jan 28 | 31°F | 14°F | 54°F 2008 | -12°F 1951 | 23% | 13% |
| Jan 29 | 31°F | 15°F | 59°F 2013 | -18°F 1949 | 23% | 13% |
| Jan 30 | 31°F | 15°F | 60°F 2012 | -26°F 2019 | 23% | 13% |
| Jan 31 | 31°F | 15°F | 59°F 2012 | -28°F 1996 | 23% | 13% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CST).
- January 1
- sunrise 7:33 AM, sunset 4:47 PM
- January 31
- sunrise 7:19 AM, sunset 5:21 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.