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May Weather in Hannibal, United States

Last updated: June 24, 2025

In May, the average temperature in Hannibal, United States hovers around 14°C (57°F), with extremes ranging from a chilly -1°C (31°F) to a warm 33°C (91°F). Expect 121 mm (4.8 in) of precipitation spread over approximately 14 days, contributing to a high average humidity of 82%.

May Temperature in Hannibal

In May in Hannibal, the average temperature is 14°C (57°F). Maximums can reach 33°C (91°F), and minimums can drop as low as -1°C (31°F). This wide temperature range makes it essential for travelers to pack accordingly for both warm days and cool nights.

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. In Hannibal, May typically has an average temperature of 14°C (57°F), with highs reaching up to 33°C (91°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec272935455766737265554033
Data source: Temperature data for Hannibal generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Hannibal

In Hannibal in May, the precipitation amount is 121 mm (4.8 in) over a span of 14 days.

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. In Hannibal, May typically receives around 121 mm (4.8 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec9697871211219318512390169113116
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 in May, humidity is 82%. With an average temperature of 14°C (57°F), this humidity feels like a thick blanket enveloping you, making outdoor activities uncomfortable and travel more challenging due to the heavy, damp air.

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, helping you understand how conditions vary by season. In May, average humidity in Hannibal is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%87%88%82%79%78%76%78%84%89%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Hannibal

In Hannibal in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Hannibal.

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. In May, the maximum UV index in Hannibal typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468910997632
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.

How May Weather in Hannibal Compares to Other Months

Weather in Hannibal varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Hannibal, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Hannibal, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)96 mm (3.8 inches)90%moderate
February Weather-2°C (29°F)96 mm (3.8 inches)90%moderate
March Weather1°C (35°F)87 mm (3.4 inches)87%high
April Weather7°C (45°F)121 mm (4.8 inches)88%very high
May Weather14°C (57°F)121 mm (4.8 inches)82%very high
June Weather19°C (66°F)93 mm (3.7 inches)79%very high
July Weather23°C (73°F)185 mm (7.3 inches)78%very high
August Weather22°C (72°F)123 mm (4.8 inches)76%very high
September Weather18°C (65°F)90 mm (3.5 inches)78%high
October Weather13°C (55°F)169 mm (6.7 inches)84%high
November Weather5°C (41°F)113 mm (4.5 inches)89%moderate
December Weather0°C (33°F)116 mm (4.5 inches)86%low

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