The climate of Hannibal
Hannibal,
Missouri, USA, experiences a Dfa category climate according to the Köppen climate classification. This distinguishes it as a humid continental region with no dry season and hot summers. The city experiences a wide range of weather conditions throughout the year with distinct variations across different seasons. The average high temperature fluctuates from a frosty 34°F (1.1°C) in
January to a summery 84.7°F (29.3°C) in
July, while the average low temperature shifts from a chilly 21.6°F (-5.8°C) in January to a milder 67.1°F (19.5°C) in July.
Relatively high humidity is prevalent throughout the year with values around 77% to 80%.
Year-round, Hannibal typically sees between 1.14" (29mm) to 3.39" (86mm) of rainfall per month. The number of rain days fluctuates from 5.3 to 17.3, significantly increasing from
February to
May. It is worth noting that snowfall occasionally occurs from January to
April and
November to
December, with the maximum snowfall of 3.31" (84mm) recorded in January. In terms of daylight duration, the shortest days are in December with an average of 9.4 hours of daylight, while the longest ones are in
June and July with approximately 14.7 to 14.9 hours.
The best time to visit Hannibal
Given the climatic conditions, the best time to visit
Hannibal depends primarily on one's preference for certain weather. For those who enjoy warm conditions, the months of
June to
August provide a balmy setting with temperatures peaking at an average high of 84.7°F (29.3°C) in
July. This period also offers the most prolonged daylight hours, allowing for extended sightseeing and outdoor activities. On the contrary, those who prefer moderate temperatures might consider visiting in
May when the average high is 72.7°F (22.6°C) or
September with a reasonable high of 78.4°F (25.8°C).
The worst time to visit Hannibal
The less favorable months for visiting
Hannibal would be during the colder part of the year. From
November to
March, the city experiences low temperatures with
January being the coldest month, averaging at a high and low of 34°F (1.1°C) and 21.6°F (-5.8°C) respectively. Additionally, the city experiences its maximum snowfall of 3.31" (84mm) in January and relatively short daylight hours in
December causing a reduction in outdoor activities.
Spring weather in Hannibal
Spring in
Hannibal, seen from
March to
May, experiences a considerable increase in temperatures and rainfall. The average high temperature rises steadily from 51.6°F (10.9°C) to 72.7°F (22.6°C) while the low temperature varies between 35.8°F (2.1°C) to 55.8°F (13.2°C). The amount of rainfall increases significantly during this season, peaking at 3.39" (86mm) in May. The total daylight hours extend from 12 hours in March to 14.4 hours in May, offering ample time for exploring the outdoors.
Summer weather in Hannibal
The summer months of
June to
August in
Hannibal are quite warm, with the average high temperature reaching its peak at 84.7°F (29.3°C) in
July. Low temperatures remain comfortable, ranging from 64.4°F (18°C) to 67.1°F (19.5°C). Despite being the hottest period, rainfall is moderate with June seeing the highest amount of 2.95" (75mm). The maximum daylight is experienced during this season, offering nearly 15 hours in both June and July.
Autumn weather in Hannibal
Autumn, from
September to
November, witnesses a gradual decline in temperature and humidity in
Hannibal. The average high temperature decreases from a warm 78.4°F (25.8°C) in September to a cooler 51.4°F (10.8°C) in November. The average low temperature follows a similar pattern, dropping from 58.3°F (14.6°C) to 36.1°F (2.3°C) during this period. Rainfall decreases steadily throughout the season, from 2.2" (56mm) in September to 1.54" (39mm) in November.
Winter weather in Hannibal
December through
February is the coldest time of year in
Hannibal, with average high temperatures falling between 34°F (1.1°C) to 38.8°F (3.8°C) and low temperatures descending from 27.1°F (-2.7°C) to 24.8°F (-4°C). Precipitation during this period includes both rain and occasional snow, with the substantial snowfall of 3.31" (84mm) typically occurring in
January. The winter season also brings the shortest daylight duration, decreasing from 10 hours in December to 9.7 hours in January.
Weather in January
January's weather in
Hannibal,
Missouri is characterized by a blend of cold temperatures and a significant amount of snowfall. Daylight hours are scarce due to the winter season, with the sun fading early and rising late. The first month of the year exhibits a notable chill, with the high and low temperatures straddling the freezing mark, from 21.6°F (-5.8°C) to 34°F (1.1°C).
Weather in January » Weather in February
Moving into
February, the weather in
Hannibal slightly eases from
January's chill. There's an upturn in the daylight hours that signals the creeping approach of spring. However, it remains a month of winter attributes, featuring cold temperatures and occasional snow.
Weather in February »Weather in March
March signals clear changes in
Hannibal's climate, distinguished by warming trends and increased rainfall. The snow that featured prominently in the previous months lightens up, giving way to rainy spells. These shifts mark the arrival of spring in Hannibal.
Weather in March »
Weather in April
April in
Hannibal continues the trend of spring, reflected by increased temperatures and more rainfall. The city sees an end to snowfall, indicating a clear departure from winter. The blend of adequate rainfall, longer daylight hours, and emerging warmth fosters the blooming of native flora.
Weather in April » Weather in May
May amounts to an amplified version of
Hannibal's spring, marked by a considerable rise in temperatures and increased daylight hours. The last vestiges of winter disappear, with no trace of snowfall. Additionally, May witnesses prolific rainfall that nurtures blooming flora and paints the city with a burst of colors and vitality.
Weather in May » Weather in June
As the calendar flips to
June,
Hannibal,
Missouri transforms under the clear signs of summer, displaying increased temperatures and extended daylight. With the summer solstice, June maximizes daylight hours, allowing residents and visitors ample time to explore the city's offerings.
Weather in June »
Weather in July
July represents the quintessential summer month in
Hannibal, featuring sunny days, high temperatures, and less rainfall. Average temperatures peak, making it the hottest month of the year. In this month, the city sees long daylight hours, allowing for more outdoor activities and events.
Weather in July » Weather in August
August's weather in
Hannibal mirrors
July's tendencies, characterized by high temperatures and a reduction in rainfall. However, occasionally, August can deliver a few surprise showers, adding a dash of freshness to the warm days.
Weather in August » Weather in September
September in
Hannibal ushers in the signs of fall, as temperatures begin to cool and daylight hours decrease slightly. The absence of snowfall and moderate temperatures make September conducive for various activities. There's a balance struck between the receding warmth of summer and the heralding chill of the impending winter.
Weather in September »
Weather in October
October brings about marked changes in
Hannibal's climate, embracing the fall season in earnest with cooling temperatures, abundant foliage, and reduced daylight hours. The characteristics of summer retreat and the month wears a distinctive autumnal look.
Weather in October » Weather in November
November in
Hannibal signifies a transition into colder weather and shorter days, as winter approaches. With the waning daylight hours, the chill in the air solidifies, hinting at the forthcoming freeze. The city observes a substantial drop in average temperature while rainfall decreases as well.
Weather in November » Weather in December
The year ends in
Hannibal with
December bringing back winter's characteristics - cold temperatures, increased snowfall, and significantly less daylight. The city dons a festive look amid shorter days and longer nights. Snowfall increases from
November's, making December one of the snowier months along with
January.
Weather in December »