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May Weather in Mascoutah, United States

Last updated: June 24, 2025

In May, the average temperature in Mascoutah, United States is a pleasant 20°C (68°F), with minimums dipping to 4°C (39°F) and maximums peaking at 35°C (95°F). Expect a total precipitation of 170 mm (6.7 in) spread over approximately 13 days, contributing to a high average humidity of 80%.

May Temperature in Mascoutah

In May in Mascoutah, the average temperature is 20°C (68°F). Maximums can reach 35°C (95°F) and minimums can be as low as 4°C (39°F). This weather makes Mascoutah an ideal destination for travelers looking to enjoy mild days and cooler evenings.

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

The chart illustrates May temperature patterns in Mascoutah, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mascoutah, May typically has an average temperature of 20°C (68°F), with highs reaching up to 35°C (95°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec333648566877807773604540
Data source: Temperature data for Mascoutah 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 Mascoutah

In Mascoutah in May, the precipitation amount is 170 mm (6.7 in) over the course of 13 days.

May Precipitation Trends in Mascoutah

The chart displays monthly precipitation patterns in Mascoutah, 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 Mascoutah, May typically receives around 170 mm (6.7 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec828714114417010092122591107971
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Mascoutah

In Mascoutah in May, humidity is 80%. With an average temperature of 20°C (68°F), this humidity feels like traveling through a warm, dense blanket that clings to your skin, making you feel both sticky and lethargic as you explore the sights.

May Average Humidity in Mascoutah

This chart illustrates the average monthly humidity levels in Mascoutah, 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 Mascoutah is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Mascoutah

In Mascoutah 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 Mascoutah.

Maximum UV Index Levels in Mascoutah for May

The chart shows the monthly maximum UV Index (UVI) for Mascoutah 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 Mascoutah typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579111110109753
Data source: Mascoutah 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 Mascoutah Compares to Other Months

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

This table compares monthly weather conditions in Mascoutah, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (33°F)82 mm (3.2 inches)84%moderate
February Weather2°C (37°F)87 mm (3.4 inches)82%moderate
March Weather9°C (48°F)141 mm (5.6 inches)84%high
April Weather13°C (56°F)144 mm (5.7 inches)83%very high
May Weather20°C (68°F)170 mm (6.7 inches)80%extreme
June Weather25°C (78°F)100 mm (3.9 inches)83%extreme
July Weather27°C (80°F)92 mm (3.6 inches)82%very high
August Weather25°C (77°F)122 mm (4.8 inches)82%very high
September Weather23°C (73°F)59 mm (2.3 inches)79%very high
October Weather15°C (60°F)110 mm (4.3 inches)79%high
November Weather7°C (45°F)78 mm (3.1 inches)88%moderate
December Weather4°C (40°F)71 mm (2.8 inches)87%moderate

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