United States
Weather in Sioux City through the year
The average of the weather stations Pipestone (168 km) and Central City (203 km); nearer ones count more.
| Month | Average high | Coolest to warmest day |
|---|---|---|
| January | -1.6 °C | -1.9 °C – -1.0 °C |
| February | 0.6 °C | -0.9 °C – 3.5 °C |
| March | 8.0 °C | 4.0 °C – 11.4 °C |
| April | 15.3 °C | 11.7 °C – 18.6 °C |
| May | 21.9 °C | 18.8 °C – 25.1 °C |
| June | 27.6 °C | 25.4 °C – 28.9 °C |
| July | 29.5 °C | 29.1 °C – 29.9 °C |
| August | 28.3 °C | 27.7 °C – 29.1 °C |
| September | 24.9 °C | 22.0 °C – 27.5 °C |
| October | 17.3 °C | 12.7 °C – 21.8 °C |
| November | 8.1 °C | 3.9 °C – 12.4 °C |
| December | 0.8 °C | -1.3 °C – 3.5 °C |