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Hannibal (MO) Weather and Climate: A Comprehensive Guide

The climate in Hannibal is marked by big temperature swings throughout the year. Temperatures range from very warm during the warmest months to cold in the cooler months. It also has a relatively rain/snowy climate with high levels of precipitation. Let’s explore the climate details in depth to provide you with a complete overview.

Average maximum day and minimum night temperature

In Hannibal, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a very warm 30°C in July to a chilly 2°C in January.

Nighttime temperatures can drop, with average lows reaching -7°C in January. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

Hannibal experiences significant rain/snowfall throughout the year, averaging 1097 mm of precipitation annually. The seasons in Hannibal, bring significant changes in precipitation. The wettest month, June, receives high rainfall, with an average of 148 mm of precipitation. This rainfall is distributed across 13 rainy days.

In contrast, the driest month, January, experiences much less snow/rainfall, totaling 38 mm over 7 snowy/rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Hannibal Precipitation page.

The mean monthly precipitation over the year, including rain, hail and snow

Forecast for Hannibal (MO)

Sat   Dec 21
2°C | -5°C
E 1 m/s
almost clear and no rain

almost clear and no rain

Sun   Dec 22
7°C | -3°C
S 5 m/s
almost clear and no rain

almost clear and no rain

Mon   Dec 23
9°C | 1°C
SW 5 m/s
overcast and no rain

overcast and no rain

The best time of year to visit Hannibal in the United States of America

During the months of May and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • When is summer in Hannibal?
    The hottest season / summer takes place in June, July, August and September.
  • Which is the warmest month in Hannibal?
    July has an average maximum temperature of 30°C and is the warmest month of the year.
  • Which is the coldest month in Hannibal?
    The coldest month is January with an average maximum temperature of 2°C.
  • Which is the wettest month in Hannibal?
    June tops the wettest month list with 148 mm of rainfall.
  • Which is the driest month in Hannibal?
    January is the driest month with 38 mm of precipitation.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.