The temperatures in Hannibal in August are comfortable with low of 19°C and and high up to 29°C.
You can expect about 3 to 8 days of rain in Hannibal during the month of August. 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 Hannibal in August 2025.
If you’re planning to visit Hannibal in the near future, we highly recommend that you review the 14 day weather forecast for Hannibal before you arrive.
Temperatures
29° / 19°
Rainy Days
6
Snowy Days
0
Dry Days
25
Rainfall
125
mm
Sun Hours
10.9
Hrs
