May Weather in Hannibal, United States

Last updated: February 24, 2025

May in Hannibal, United States, unveils a dynamic climate characterized by its warm temperatures and notable precipitation. With maximum temperatures soaring to 35°C (95°F), the warmth invites outdoor activities, while the average temperature rests at a comfortable 19°C (66°F). Early mornings can be brisk, dipping to a minimum of 3°C (38°F). Despite the pleasant warmth, residents and visitors should prepare for frequent rain, as the area experiences 160 mm (6.3 in) of precipitation over 15 days, contributing to a high humidity level of 82%. This blend of warmth and moisture creates a lush landscape, making May a vibrant yet unpredictable month in Hannibal.

May Temperature in Hannibal

In Hannibal, United States, May marks a vibrant transition into warmer days, with temperatures reflecting a significant warming trend. The average temperature rises to a pleasant 19°C (66°F), complemented by minimums of 3°C (38°F) and maximums reaching a sizzling 35°C (95°F). This month stands out as the culminating point of spring, where the chill of winter finally recedes, paving the way for the sun’s embrace. Notably, this increase in warmth not only enhances outdoor activities but also signals the approach of summer, making May a delightful time to enjoy the natural beauty and recreation that Hannibal has to offer. As the floral bloom aligns with these rising temperatures, the ambiance transforms into one of vibrancy and life, embodying the essence of the season.

May Weather in Hannibal: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Hannibal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec293244536675797571574236
Data source: Temperature data for Hannibal generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Hannibal

In May, Hannibal experiences a surge in precipitation, receiving a notable 160 mm (6.3 in) of rain over 15 days, making it the wettest month of the year. This significant increase follows the relatively moderate rainfall of 103 mm (4.0 in) in April, showcasing a transition into the lushness of spring. The number of rainy days also rises, suggesting that May's weather is more consistently wet, unlike the earlier spring months that had fewer precipitation days. This trend indicates the onset of summer storms, which tend to bring both higher volumes of rain and increased frequency as the season progresses. Overall, May marks a pivotal shift in Hannibal’s climate, setting the stage for the warmer months ahead.

May Precipitation Trends in Hannibal

The chart displays monthly precipitation patterns in Hannibal, with values for each month alongside May's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec65621251031601199299851086045
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Hannibal

In Hannibal, United States, May brings a mild humidity level of 82%, mirroring the preceding months of January through April. This consistent humidity trend suggests a comfortable yet slightly sticky atmosphere as spring transitions into summer. As the year progresses, humidity levels peak in June at 83% before tapering off slightly in the following months. The rise in humidity through early summer contrasts with the drier conditions of late summer and autumn, where September and October see a drop to 76%, highlighting a notable shift in the climate. Overall, May acts as a pivotal month, bridging the refreshing spring humidity with the more intense levels that characterize the hot summer ahead.

May Average Humidity in Hannibal

This chart illustrates the average monthly humidity levels in Hannibal, with May's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how May's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Hannibal

As spring transitions into summer, Hannibal experiences a notable increase in UV intensity, with May's UV Index peaking at 10, placing it firmly in the very high exposure category. This marks a significant rise from April's Index of 9. With a burn time of just 15 minutes, residents and visitors alike should be vigilant about sun protection during this month. Following May, the UV levels will escalate even further in June and July, reaching extreme heights, showing a clear trend of increasing UV exposure as the warm months progress. To stay informed and safe, check out the detailed insights at Hannibal UV Index.

Maximum UV Index Levels in Hannibal for May

The chart shows the monthly maximum UV Index (UVI) for Hannibal in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109643
Data source: Hannibal May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

May Sunshine in Hannibal

May is a radiant month in Hannibal, United States, as the sunshine hours peak, reaching an impressive 280 hours. This marks a significant upswing from the 242 hours recorded in April, highlighting the transition into summer and the increasing warmth. The trend is clear: as spring unfolds, daylight hours continue to soar, culminating in June with an even brighter 329 hours of sunshine. The gradual march toward summer is reflected in the data, with each month leading into May showcasing a steady rise. As the days grow longer and sunnier, Hannibal's vibrant landscapes and outdoor activities come alive, inviting residents and visitors alike to soak in the beauty of the season.

Monthly Sunshine Duration in Hannibal: May Highlighted

The May sunshine duration represents the total number of hours Hannibal experiences direct sunlight during the month of May, excluding cloudy or obstructed periods. This chart compares the sunshine duration of May with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec122h179h209h242h280h329h350h330h286h230h208h204h
Data source: Hannibal May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Hannibal During May

May in Hannibal, United States, presents a notably lower chance of sunny weather, with only a 27% likelihood of clear skies. This marks a dip following the gradual increase in sunny days witnessed from January to April, where sunshine chances rose from 32% to 48%. As spring transitions into summer, one might anticipate an upward trend; however, the May figures indicate a temporary decline before the summer months rebound with better prospects for sun, reaching 46% in both June and July. Thus, while May may not offer optimal sunshine, it sets the stage for sunnier days ahead as the season progresses.

Percentage of Sunny Days in May in Hannibal

The chart illustrates the percentage of sunny days in Hannibal throughout the year, with May highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Hannibal experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec32%33%43%48%27%46%46%51%67%39%50%47%
Data source: Hannibal May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Hannibal in May

As spring blossoms into summer, Hannibal, United States experiences a delightful increase in daylight duration. In May, residents bask in 14 hours of daylight, marking a peak that is mirrored in the following month of June. This gradual rise from 9 hours in January through 10 hours in February, and 11 hours in March, illustrates a vibrant transition towards longer days. April sets the stage with a pleasant 13 hours, paving the way for the golden glow of May. As the seasons shift towards autumn, daylight begins to wane, showcasing a natural rhythm where August enjoys slightly less at 13 hours, followed by a gentle decline until the winter months return with just 9 hours of light in both November and December. This trend not only enhances the outdoor experience but also enriches the community spirit as longer days invite more activities and gatherings under the sun.

Average Daylight Hours in Hannibal for May

The chart illustrates the variation in daylight duration in Hannibal throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 42m10h 42m11h 58m13h 17m14h 23m14h 55m14h 37m13h 39m12h 23m11h 5m9h 57m9h 23m
Data source: Hannibal daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Hannibal

In May, the average wind speed in Hannibal, United States settles at 3.4 m/s (8 mph), marking a slight dip from the busier breezes of March and April but still aligning with the consistent 8 mph we see in several months throughout the year. This mild wind speed is characteristic of the transition into summer, reflecting the region's temperate climate as it prepares for the warmth ahead. Notably, the trend shows that wind speeds typically decrease from the spring peak in March, suggesting that as the landscape bursts into full bloom, the gentle winds complement the season's tranquil beauty. With a steady flow of air, May offers a delightful backdrop for outdoor activities and scenic adventures in this charming riverside town.

Average May Wind Speed in Hannibal

The chart displays monthly wind speed patterns in Hannibal, with values for each month shown alongside May's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how May's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.53.64.13.73.4 m/s2.82.22.63.23.53.53.8
Data source: Hannibal May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Hannibal Compares to Other Months

The weather in Hannibal changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of May's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Hannibal and find detailed weather information for every month.

May and January present starkly contrasting weather conditions. In May, temperatures range from a chill 3°C (38°F) to a warm high of 35°C (95°F), with an average of 19°C (66°F). The month sees significant precipitation, with 160 mm (6.3 in) falling over approximately 15 days, creating a humid atmosphere with 82% humidity. Conversely, January features much colder temperatures, with lows plunging to -26°C (-15°F) and an average of -2°C (29°F), peaking at a relatively mild 17°C (63°F). Precipitation during January is much lower at 65 mm (2.5 in) over just 7 days, yet the humidity remains at 82%, leaving a dry chill in the air. For more details, you can visit Hannibal weather in January.

When comparing the weather of May and February, the differences are stark. May boasts much milder temperatures, with a minimum of 3°C (38°F) and an average reaching 19°C (66°F), while February can plunge to a chilling -26°C (-15°F) at night, with an average of 0°C (32°F). Additionally, May experiences a maximum temperature of up to 35°C (95°F), introducing warmer and more humid conditions at 82% humidity, compared to February's higher precipitation of 62 mm (2.4 in) over just 9 days and slightly lower humidity at 80%. For more detailed insights on February weather, check out Hannibal weather in February.

In comparing the weather of May and March, notable differences emerge. May typically experiences a much warmer climate with average temperatures reaching 19°C (66°F) and maximums soaring to 35°C (95°F). In contrast, March showcases a cooler environment, with average temperatures around 7°C (45°F) and lows dipping to -17°C (2°F). Additionally, while May sees more precipitation at 160 mm (6.3 in) spread over 15 days, March has slightly less at 125 mm (4.9 in) across 11 days. The humidity in both months is relatively high, with May at 82% and March at 80%. For a detailed look at the specifics of March weather, you can refer to Hannibal weather in March.

In comparing the weather between April and May, May generally experiences significantly warmer temperatures with an average of 19°C (66°F) compared to April's average of 12°C (53°F). The minimum temperatures in May are notably higher as well, with May's minimum at 3°C (38°F) versus April's chilling -7°C (19°F). However, May also brings more rain, with 160 mm (6.3 in) of precipitation over 15 days, compared to April's 103 mm (4.0 in) over 10 days. Humidity levels are slightly increased in May at 82%, compared to April's 80%. Thus, while May ushers in warmer weather, it also tends to be wetter. For more specific weather details about April, you can refer to Hannibal weather in April.

May and June present a notable transition in weather patterns. In May, temperatures range from a minimum of 3°C (38°F) to a maximum of 35°C (95°F), with an average of 19°C (66°F). The month sees significant precipitation, totaling 160 mm (6.3 in) over 15 days, accompanied by a high humidity level of 82%. In contrast, June brings warmer temperatures, with lows of 11°C (52°F), an average of 24°C (76°F), and highs reaching 35°C (96°F). Precipitation decreases to 119 mm (4.7 in) over 10 days, while humidity slightly rises to 83%. Overall, June offers a warmer, less rainy experience compared to May, making it a more pleasant month for outdoor activities. For a detailed look at the weather conditions, check out Hannibal weather in June.

In comparing the weather between May and July, May tends to be cooler with temperatures ranging from a minimum of 3°C (38°F) to an average of 19°C (66°F) and a maximum of 35°C (95°F). It also experiences significantly higher precipitation, totaling 160 mm (6.3 in) over 15 days, accompanied by high humidity levels at 82%. In contrast, July offers warmer conditions with temperatures starting at a minimum of 14°C (58°F), averaging 26°C (79°F), and peaking at 36°C (97°F). The month is drier, receiving 92 mm (3.6 in) of rainfall over just 9 days and maintaining a slightly lower humidity of 81%. For a more detailed look at the climate, you can check out Hannibal weather in July.

May and August in Hannibal present notably different weather patterns. In May, temperatures range from a low of 3°C (38°F) to a high of 35°C (95°F), with an average of 19°C (66°F). The month experiences higher rainfall, with 160 mm (6.3 in) of precipitation over about 15 days, accompanied by high humidity at 82%. In contrast, August typically sees warmer nights with a minimum of 12°C (55°F) and an average temperature of 24°C (75°F). While the maximum temperature can still reach 35°C (96°F), the month receives significantly less precipitation at 99 mm (3.9 in) over about 10 days, with humidity slightly lower at 80%. For more detailed insights on August's weather, check out Hannibal weather in August.

May and September present contrasting weather patterns, each with its unique characteristics. May tends to be more unpredictable, featuring a wider temperature range with a minimum of 3°C (38°F) and a maximum that can reach up to 35°C (95°F). In addition, May experiences more rainfall, with an average precipitation of 160 mm (6.3 in) over 15 days, contributing to a higher humidity level of 82%. In contrast, September settles into more stable conditions, boasting a milder minimum temperature of 7°C (45°F) and maintaining an average of 22°C (71°F), while still allowing for maximum highs of 35°C (95°F). Rainfall in September is significantly reduced, with only 85 mm (3.3 in) over just 7 days, and a lower humidity level at 76%. For more information, you can check out the detailed forecast at Hannibal weather in September.

May and October showcase distinct weather patterns, with May typically offering warmer temperatures ranging from a minimum of 3°C (38°F) to a maximum of 35°C (95°F) and an average of 19°C (66°F). In contrast, October sees cooler temperatures, with a minimum of -5°C (24°F) and an average of 14°C (57°F), peaking at 32°C (91°F). While May experiences more precipitation, totaling 160 mm (6.3 in) over 15 days, October has a lighter rainfall amount of 108 mm (4.2 in) across just 10 days. The humidity levels also drop slightly in October to 76%, compared to May's higher humidity of 82%. For more detailed information, you can explore Hannibal weather in October.

May and November present a stark contrast in weather conditions. In May, temperatures can reach as high as 35°C (95°F), with an average of 19°C (66°F) and relatively high humidity at 82%. This month typically experiences considerable precipitation, averaging 160 mm (6.3 in) over 15 days. Conversely, November sees much cooler temperatures, with a maximum of 24°C (75°F) and an average of 6°C (43°F), dipping down to a minimum of -14°C (6°F). Precipitation is significantly reduced, averaging 60 mm (2.4 in) over just 9 days, while humidity remains slightly higher at 85%. To learn more about November weather specifics, you can check Hannibal weather in November.

May and December present a striking contrast in weather conditions. May typically enjoys warmer temperatures, with an average of 19°C (66°F) and a maximum that can reach as high as 35°C (95°F), while December's average temperature drops significantly to just 2°C (37°F), with a chilly minimum of -19°C (-2°F). Additionally, May experiences more precipitation, averaging 160 mm (6.3 in) over 15 days, compared to December’s modest 45 mm (1.8 in) over only 6 days. Humidity levels are relatively similar, with May at 82% and December slightly higher at 86%. For a more detailed look at weather specifics during December, you can visit Hannibal weather in December.

Compare Hannibal's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Hannibal

As May unfolds in Hannibal, the weather brings a refreshing shift from the cooler temperatures of earlier months. The days begin to bask in warmth, with maximum temperatures reaching their peak, inviting outdoor activities amid the vibrant spring scenery. While you may experience occasional rain showers, the overall humidity levels contribute to a lush and green landscape, setting the stage for a beautiful transition into summer. Embrace the charm of May’s fluctuating temperatures and varied conditions that breathe life into the town. For more detailed insights on seasonal variations, check out Hannibal Climate.