Typical Weather in Sioux City, IA in September

78° F Avg High

53° F Avg Low

5 Rainy Days

☀️ Temperature Summary

September is a popular time to visit, with an inviting climate featuring warm temperatures. September is one of the warmer months of the year for Sioux City, with highs averaging around 78°F. You can expect overnight lows near 53°F most days. Temperatures will usually fall as the month goes on, with daily high temperatures ranging between 81°F and 70°F.

September is a great time to visit Sioux City, with mild temperatures and sunny days being very common.

High Temps Throughout the Year

☔ Rain Summary

In September you can expect close to a 16% chance of rain for any given day. It rains more than usual in September, with total rainfall for the month typically near 3 inches.

Rainfall Throughout the Year

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📍 Nearby Cities in September

86°F / 61°F
83°F / 57°F
77°F / 52°F
72°F / 51°F
73°F / 50°F
79°F / 54°F

📅 Year Round Weather in Sioux City

31°F / 10°F
32°F / 10°F
49°F / 25°F
60°F / 35°F
71°F / 48°F
84°F / 60°F
87°F / 64°F
83°F / 61°F
78°F / 53°F
63°F / 38°F
49°F / 25°F
36°F / 16°F
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