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August Weather in Saint Joseph, United States

Last updated: June 24, 2025

In August, the average temperature in Saint Joseph, United States is a warm 28°C (83°F). Expect temperatures to range from a comfortable 20°C (68°F) to a sizzling 37°C (100°F). Be prepared for occasional showers, as the area receives about 111 mm (4.4 in) of precipitation over 14 days. With an average humidity level of 79%, it’s a steamy time of year!

August Temperature in Saint Joseph

In August in Saint Joseph, the average temperature is 28°C (83°F), with maximums reaching up to 37°C (100°F) and minimums dipping as low as 20°C (68°F). This makes it an ideal time for travelers to enjoy warm weather and outdoor activities.

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

The chart illustrates August 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, August typically has an average temperature of 28°C (83°F), with highs reaching up to 37°C (100°F) and lows dropping to around 20°C (68°F).
JanFebMarAprMayJunJulAugSepOctNovDec505462667580838280705753
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.

August Precipitation in Saint Joseph

In Saint Joseph in August, the precipitation amount is 111 mm (4.4 in) during 14 days, indicating a significant amount of rainfall for that period.

August Precipitation Trends in Saint Joseph

The chart displays monthly precipitation patterns in Saint Joseph, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Saint Joseph, August typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec1171551201521331231081118811686118
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Saint Joseph

In Saint Joseph in August humidity is 79%. With an average temperature of 28°C (83°F), this humidity feels like a thick blanket wrapping around you, making outdoor activities a challenge but also adding a certain tropical charm to your travel experience.

August Average Humidity in Saint Joseph

This chart illustrates the average monthly humidity levels in Saint Joseph, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Saint Joseph is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%83%80%81%81%78%79%79%79%77%85%88%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Saint Joseph

In Saint Joseph in August, 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 August

The chart shows the monthly maximum UV Index (UVI) for Saint Joseph in August, 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 August, the maximum UV index in Saint Joseph typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479111112121110864
Data source: Saint Joseph August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)117 mm (4.6 inches)83%moderate
February Weather12°C (55°F)154 mm (6.1 inches)83%high
March Weather17°C (63°F)120 mm (4.7 inches)80%very high
April Weather19°C (66°F)152 mm (6.0 inches)81%extreme
May Weather24°C (75°F)132 mm (5.2 inches)81%extreme
June Weather27°C (80°F)123 mm (4.9 inches)78%extreme
July Weather28°C (83°F)108 mm (4.3 inches)79%extreme
August Weather28°C (83°F)111 mm (4.4 inches)79%extreme
September Weather27°C (80°F)88 mm (3.5 inches)79%very high
October Weather21°C (70°F)116 mm (4.6 inches)77%very high
November Weather14°C (57°F)86 mm (3.4 inches)85%high
December Weather12°C (54°F)118 mm (4.7 inches)88%moderate

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