| Month | Average (°F) | Record (°F) | Average (inches) | ||
|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | |
| January | 30.5 | 14.2 | 68 | -31 | 1.0 |
| February | 35.3 | 17.9 | 77 | -32 | 1.3 |
| March | 48.9 | 29.1 | 88 | -17 | 2.2 |
| April | 62.3 | 39.8 | 93 | 10 | 3.8 |
| May | 73.1 | 51.5 | 105 | 24 | 4.6 |
| June | 82.3 | 61.8 | 105 | 37 | 5.2 |
| July | 85.5 | 65.5 | 109 | 40 | 3.9 |
| August | 83.6 | 63.2 | 108 | 38 | 4.0 |
| September | 77.1 | 54.3 | 101 | 20 | 3.3 |
| October | 63.9 | 42.2 | 94 | 4 | 3.0 |
| November | 48.6 | 29.8 | 81 | -6 | 2.2 |
| December | 35.7 | 19.8 | 75 | -27 | 1.5 |
| Entire year | 60.6 | 40.9 | 109 | -32 | 35.9 |
|
More Iowa City Weather Records
1893–2024
|
||
|---|---|---|
| Highest daily low | 84 °F | July 26, 1997 |
| Lowest daily high | -13 °F | February 3, 1996 |
| Greatest daily range (Difference of high and low) |
58 °F | February 27, 2024 |
| Greatest difference in daily high over two conscutive days |
50 °F | Feb 7–8, 1904 |
| Most daily precipitation | 6.9 inches | July 14, 1962 |
| Most monthly precipitation | 13.4 inches | July 1993 |
| Most yearly precipitation | 61.6 inches | 1993 |
| Most yearly days with precipitation | 148 | 2008 |
| Earliest freeze | September 18 | 1929 |
| Earliest day ≥ 80 °F | March 3 | 2024 |
| Earliest day ≥ 90 °F | April 10 | 1930 |
| Earliest day ≥ 100 °F | May 29 | 1934 |
| Latest freeze | May 25 | 1925 |
| Latest day ≥ 80 °F | November 20 | 1897 |
| Latest day ≥ 90 °F | October 18 | 1950 |
| Latest day ≥ 100 °F | September 13 | 1897 |
| Most days in a year < 0 °F | 40 | 1963 |
| Most days in a year < 32 °F | 164 | 1952 |
| Most days in a year ≥ 80 °F | 127 | 2005 |
| Most days in a year ≥ 90 °F | 63 | 1988 |
| Most days in a year ≥ 100 °F | 23 | 1936 |
|
Iowa City Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 12 days | Apr 24 – May 5, 1937 |
| Without precipitation | 55 days | Sep 23 – Nov 16, 1952 |
| High temperature at or below freezing |
39 days | Jan 15 – Feb 22, 1936 |
| High temperature ≥ 80 °F | 66 days | Jul 7 – Sep 10, 1983 |
| High temperature ≥ 90 °F | 19 days | Jul 9–27, 1901 |
| High temperature ≥ 100 °F | 13 days | Jul 5–17, 1936 |