Hannibal (MO) Temperature by Month
Hannibal in Missouri, United States of America sees significant seasonal temperature differences, with daytime highs between 2°C (36°F) in January and 30°C (86°F) in July, averaging 17°C (63°F) annually. Explore the full monthly breakdown below.
Hannibal Monthly Temperatures
Visitors to Hannibal can expect significant temperature changes throughout the year. Nighttime temperatures also vary widely, ranging from 20°C (68°F) in July to -7°C (19°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Hannibal by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest.
The chart below shows the average temperature throughout the year:
Temperature: Hannibal vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
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Hannibal vs World: Temperature Compared
Hannibal's average annual maximum temperature is 17°C (63°F). To put that in context, here's how it compares to a few well-known destinations:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.
Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters — and seasons reversed compared to Europe.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Hannibal this rarely lasts long on the ground.
For more on Hannibal's weather — including monthly rainfall, sunshine hours, and humidity — visit our Hannibal climate page.
