May Weather in Saint Joseph, United States

Last updated: June 24, 2025

In May, the average temperature in Saint Joseph, United States hovers around 21°C (71°F). You'll experience a range from a cool 4°C (39°F) to a warm 34°C (93°F) throughout the month. Be prepared for some rain, as 117 mm (4.6 in) of precipitation is expected over 12 days. Additionally, the air is quite humid, with average humidity levels reaching a cozy 83%.

May Temperature in Saint Joseph

In May in Saint Joseph, the average temperature is 21°C (71°F), with maximums reaching up to 34°C (93°F) and minimums dropping as low as 4°C (39°F). It's a great time for travelers to experience a pleasant blend of warmth and cooler evenings in Saint Joseph.

May Weather in Saint Joseph: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Saint Joseph, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Joseph, May typically has an average temperature of 21°C (71°F), with highs reaching up to 34°C (93°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec434755617177807975645047
Data source: Temperature data for Saint Joseph 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 Saint Joseph

In Saint Joseph in May, the total precipitation amount is 117 mm (4.6 in), occurring over a span of 12 days.

May Precipitation Trends in Saint Joseph

The chart displays monthly precipitation patterns in Saint Joseph, 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 Saint Joseph, May typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec12719318916311711811711010410976158
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Saint Joseph

In Saint Joseph in May humidity is 83%. With an average temperature of 21°C (71°F), this humidity feels like walking through a warm mist, making travel both refreshing and slightly uncomfortable as the air clings to your skin and you find yourself needing to take frequent breaks to hydrate.

May Average Humidity in Saint Joseph

This chart illustrates the average monthly humidity levels in Saint Joseph, 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 Saint Joseph is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%81%83%83%80%74%70%73%85%88%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Saint Joseph

In Saint Joseph 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 Saint Joseph.

Maximum UV Index Levels in Saint Joseph for May

The chart shows the monthly maximum UV Index (UVI) for Saint Joseph 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 Saint Joseph typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109753
Data source: Saint Joseph 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 Saint Joseph Compares to Other Months

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

This table compares monthly weather conditions in Saint Joseph, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)127 mm (5.0 inches)86%moderate
February Weather9°C (48°F)193 mm (7.6 inches)85%high
March Weather13°C (55°F)189 mm (7.4 inches)84%very high
April Weather16°C (61°F)163 mm (6.4 inches)81%very high
May Weather21°C (71°F)117 mm (4.6 inches)83%extreme
June Weather25°C (77°F)118 mm (4.6 inches)83%extreme
July Weather27°C (80°F)117 mm (4.6 inches)80%extreme
August Weather26°C (79°F)110 mm (4.3 inches)73%very high
September Weather24°C (75°F)104 mm (4.1 inches)70%very high
October Weather18°C (65°F)109 mm (4.3 inches)73%high
November Weather10°C (50°F)76 mm (3.0 inches)85%moderate
December Weather8°C (47°F)158 mm (6.2 inches)88%moderate

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