Average temperature in January is -2 °C
Average daytime temperature is 2.5 °C
Average night temperature is -4.8 °C
Absolute maximum temperature: 13.5 °C
Absolute minimum temperature: -21.3 °C
Number of sunny days: 14
Number of rainy days: 7
Number of snow days: 10
Precipitation sum: 58 mm
* Weather data for Iowa City United States is based on climate observations for 2023 year
| January (°C) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperature | 6.4 | 6.6 | 13.5 | 5 | 1.3 | 0.9 | 0.3 | 1.5 | 8 | 5.2 | 8.7 | 2.4 | 0.2 | 3 | 6.9 | 12.9 | 6.8 | 3.8 | 1.3 | 0 | 2.8 | 0.7 | 0.7 | 4 | 0.9 | -1.4 | 4.4 | -4.4 | -6.4 | -12.9 | -7.8 |
| Apparent max temperature | 4.7 | 2.7 | 11.1 | 0.3 | -5 | -3.3 | -4 | -2.6 | 3.2 | 1.8 | 6.1 | -1.6 | -5.1 | -2.5 | 1.3 | 9.8 | 2.4 | -1.9 | -2.4 | -5.7 | -0.9 | -3.5 | -4.8 | 0.9 | -3.8 | -6.8 | -1.4 | -9.9 | -12.4 | -18.9 | -12.9 |
| Mean temperature | 2.1 | 1.7 | 5.3 | 0.9 | -0.5 | -2.5 | -5.4 | -4.2 | -1.1 | 1.4 | 2.7 | 0 | -3.1 | -4.1 | 1.6 | 7.4 | 3.4 | 0.7 | 0.8 | -1 | -3.2 | -1.1 | -3.9 | -0.8 | -0.8 | -5.9 | -3.6 | -6.1 | -10.1 | -14.7 | -15.1 |
| Apparent mean temperature | -5.4 | -5.2 | -1.7 | -6 | -6.6 | -9.9 | -13.7 | -11.1 | -10.3 | -5.8 | -3.8 | -7.8 | -11.5 | -11.8 | -7.1 | -0.5 | -4.6 | -6.1 | -6.5 | -8.3 | -10.5 | -5.9 | -12.2 | -8.7 | -7.1 | -17.1 | -15.9 | -13.3 | -19.2 | -22.3 | -26.7 |
| Minimum temperature | -1.7 | -1.5 | 3.3 | -1 | -1.6 | -4.8 | -8.8 | -7.1 | -5.7 | -2.1 | -0.2 | -1.7 | -5 | -7.5 | -1 | 4.9 | 0.6 | -1.9 | 0.1 | -2.2 | -6.4 | -2.1 | -6.9 | -4.6 | -3.1 | -10.5 | -10.4 | -8.1 | -13.2 | -16.5 | -21.3 |
| Apparent min temperature | -0.9 | -2 | 1 | -4.2 | -5.9 | -7.1 | -9.9 | -8.1 | -5.6 | -2.3 | -0.6 | -5.6 | -9 | -8.7 | -4.2 | 2.7 | -1.9 | -3.8 | -4.1 | -6.9 | -7.3 | -4.9 | -9 | -4.8 | -4.9 | -12.4 | -9.8 | -11.5 | -16.4 | -20.8 | -20.1 |
| January | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight duration (h) | 9.2 | 9.2 | 9.2 | 9.3 | 9.3 | 9.3 | 9.3 | 9.3 | 9.4 | 9.4 | 9.4 | 9.4 | 9.4 | 9.5 | 9.5 | 9.5 | 9.5 | 9.6 | 9.6 | 9.6 | 9.7 | 9.7 | 9.7 | 9.8 | 9.8 | 9.8 | 9.9 | 9.9 | 9.9 | 10 | 10 |
| Sunshine duration (h) | 4 | 2.8 | 2.4 | 0 | 0 | 4.3 | 8.2 | 8.3 | 8 | 8.1 | 7.1 | 2 | 7.6 | 8 | 7.1 | 3.3 | 0.6 | 2.6 | 0 | 3.5 | 0.5 | 1 | 5.6 | 8 | 0 | 6.9 | 3.6 | 0 | 8.5 | 8.8 | 8.8 |
| Precipitation (mm) | 1.3 | 0 | 20.3 | 0.5 | 1.3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.1 | 0 | 0 | 10.7 | 0 | 0.6 | 9 | 0.1 | 0.1 | 5.3 | 0 | 0 | 3.2 | 0.8 | 1.6 | 2.5 | 0.9 | 0.2 | 0 |
| Precipitation hours | 1 | 0 | 18 | 5 | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 14 | 0 | 2 | 9 | 1 | 1 | 18 | 0 | 0 | 13 | 7 | 9 | 10 | 8 | 2 | 0 |
| Wind speed (m/s) | 13.9 | 15.8 | 23.7 | 22.2 | 25.7 | 19.6 | 11.2 | 10.5 | 16.6 | 16.3 | 11.9 | 29.5 | 24.5 | 18.4 | 25.6 | 28 | 27.4 | 24.1 | 32.1 | 27.5 | 13 | 12.9 | 20.4 | 15.8 | 20 | 24.1 | 33.3 | 21.6 | 24.1 | 18.5 | 11.6 |
In January 2023, the highest daytime temperature in Iowa City was 13.5°C.
While the minimum temperature at night dropped to -21.3°C.
The average nighttime and daytime temperatures during January in Iowa City are -4.8°C and 2.5°C respectively.
The precipitation sum in January is about 58 mm.