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May Weather in Cape Girardeau, United States

Last updated: June 24, 2025

In May, the average temperature in Cape Girardeau, United States hovers around 20°C (69°F), offering a pleasant climate. However, don't be surprised if temperatures swing between a cool 3°C (38°F) and a warm 33°C (92°F). Prepare for some rainfall, as 158 mm (6.2 in) of precipitation is expected over 13 days, accompanied by an average humidity level of 82%.

May Temperature in Cape Girardeau

In May in Cape Girardeau, the average temperature is 20°C (69°F), with maximums reaching up to 33°C (92°F) and minimums dropping to as low as 3°C (38°F). This temperature range makes Cape Girardeau an ideal destination for travelers seeking a mix of warm days and cooler evenings.

May Weather in Cape Girardeau: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Cape Girardeau, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cape Girardeau, May typically has an average temperature of 20°C (69°F), with highs reaching up to 33°C (92°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec363950576977807773614642
Data source: Temperature data for Cape Girardeau 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 Cape Girardeau

In Cape Girardeau in May, the precipitation amount is 158 mm (6.2 in) over the course of 13 days.

May Precipitation Trends in Cape Girardeau

The chart displays monthly precipitation patterns in Cape Girardeau, 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 Cape Girardeau, May typically receives around 158 mm (6.2 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec1071271641351581029693731299591
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Cape Girardeau

In Cape Girardeau in May humidity is 82%. With an average temperature of 20°C (69°F), this humidity feels like a warm, sticky embrace that clings to your skin, making it necessary to stay hydrated while exploring the sights.

May Average Humidity in Cape Girardeau

This chart illustrates the average monthly humidity levels in Cape Girardeau, 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 Cape Girardeau is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%84%80%82%83%80%76%75%75%85%88%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Cape Girardeau

In Cape Girardeau in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Cape Girardeau.

Maximum UV Index Levels in Cape Girardeau for May

The chart shows the monthly maximum UV Index (UVI) for Cape Girardeau 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 Cape Girardeau typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710111110109753
Data source: Cape Girardeau 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 Cape Girardeau Compares to Other Months

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

This table compares monthly weather conditions in Cape Girardeau, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (37°F)107 mm (4.2 inches)86%moderate
February Weather4°C (40°F)127 mm (5.0 inches)84%high
March Weather10°C (50°F)164 mm (6.5 inches)84%high
April Weather14°C (57°F)135 mm (5.3 inches)80%very high
May Weather20°C (69°F)158 mm (6.2 inches)82%extreme
June Weather25°C (77°F)102 mm (4.0 inches)83%extreme
July Weather27°C (81°F)96 mm (3.8 inches)79%very high
August Weather25°C (78°F)93 mm (3.6 inches)76%very high
September Weather23°C (74°F)72 mm (2.9 inches)75%very high
October Weather16°C (61°F)129 mm (5.1 inches)74%high
November Weather8°C (46°F)95 mm (3.7 inches)85%moderate
December Weather6°C (42°F)91 mm (3.6 inches)88%moderate

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