Sioux City in May
7.2out of 10
Possible, with caveats
Warm and comfortable: highs around 22°C. Frequent rain: about 13 rainy days.
22°CAvg high
11°CAvg low
13Rainy days (126 mm)
14:25 hDaylight
06:09Sunrise · 20:34 Sunset
Why this score
- Warm and comfortable: highs around 22°C
- Frequent rain: about 13 rainy days
What to wear and pack
- T-shirts and light layers
- A light jacket for cooler evenings
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in May varies a lot between years (±3.2 rainy days), so check the forecast closer to your trip. 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 May?
Daytime highs average 22°C and nights about 11°C.
When is the best time to visit Sioux City?
The best months are September, August, July.