Sioux City in January
4.4out of 10
Not the best time
Cold: highs around -1°C. Some rain: about 5 rainy days.
-1°CAvg high
-10°CAvg low
5Rainy days (23 mm)
9:13 hDaylight
07:58Sunrise · 17:11 Sunset
Why this score
- Cold: highs around -1°C
- Some rain: about 5 rainy days
- Nights fall to about -10°C
What to wear and pack
- Winter coat, hat and scarf
- Gloves for freezing mornings
How reliable is the forecast?
Rainfall in January is fairly consistent from year to year (1.9 days). Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | -1°C | -10°C | 23 mm | 5 | – | – | 4.4 |
| February | 2°C | -8°C | 27 mm | 5 | – | – | 4.5 |
| March | 9°C | -2°C | 55 mm | 7 | – | – | 5.8 |
| April | 17°C | 4°C | 100 mm | 11 | – | – | 6.7 |
| May | 22°C | 11°C | 126 mm | 13 | – | – | 7.2 |
| June | 28°C | 17°C | 123 mm | 12 | – | – | 7.3 |
| July | 30°C | 19°C | 76 mm | 9 | – | – | 7.7 |
| August | 28°C | 17°C | 98 mm | 9 | – | – | 7.8 |
| September | 25°C | 13°C | 76 mm | 8 | – | – | 8.1 |
| October | 17°C | 6°C | 61 mm | 7 | – | – | 7.4 |
| November | 9°C | -2°C | 40 mm | 6 | – | – | 5.9 |
| December | 1°C | -8°C | 30 mm | 5 | – | – | 4.4 |
Frequently asked questions
How hot is Sioux City in January?
Daytime highs average -1°C and nights about -10°C.
When is the best time to visit Sioux City?
The best months are September, August, July.