Kansas City, Missouri weather in September

Averages from 2021–2025 (150 days of record).

Average high: 82°F
Average low: 63°F
Rainy days: ~6 per month
Total precipitation: 2.5 in
Warmest recorded: 97°F
Coldest recorded: 49°F

Expect September days in Kansas City, Missouri to top out around 82°F and cool to about 63°F overnight, with roughly 6 days of measurable rain across the month. In recent years September has ranged from 49°F to 97°F.

Other months

January February March April May June July August October November December

Current Kansas City, Missouri forecast → · Historical data by Open-Meteo (ERA5).