The temperatures in Bay City in September are comfortable with low of 12°C and and high up to 22°C.
You can expect about 3 to 8 days of rain in Bay City during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Bay City in September 2025.
If you’re planning to visit Bay City in the near future, we highly recommend that you review the 14 day weather forecast for Bay City before you arrive.
Temperatures
22° / 12°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
81
mm
Sun Hours
10.2
Hrs
