August Weather in Union, United States

Last updated: June 24, 2025

In Union, United States, the average temperature in August hovers around 27°C (81°F). You can expect a minimum of 18°C (64°F) and a maximum of 37°C (99°F) during this period. Rainfall totals are around 127 mm (5.0 in) spread over 14 days, contributing to an average humidity level of 77%. Prepare for a warm and humid month!

August Temperature in Union

In August in Union, the average temperature is 27°C (81°F). Maximum temperatures can reach up to 37°C (99°F), while minimums can dip as low as 18°C (64°F). It’s an ideal time for travelers to enjoy warm weather and outdoor activities in Union.

August Weather in Union: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Union, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Union, August typically has an average temperature of 27°C (81°F), with highs reaching up to 37°C (99°F) and lows dropping to around 18°C (64°F).

Data source: Temperature data for Union generated using information from the Copernicus Climate Change Service.

August Precipitation in Union

In Union in August, the total precipitation amount is 127 mm (5.0 in), occurring over the course of 14 days.

August Precipitation Trends in Union

The chart displays monthly precipitation patterns in Union, 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 Union, August typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 14 days.

Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

August Humidity in Union

In Union in August, humidity is 77%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket, making travel feel sticky and heavy, as sweat clings to the skin and the air becomes thick, causing you to long for refreshing breezes and cool shade.

August Average Humidity in Union

This chart illustrates the average monthly humidity levels in Union, 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 Union is approximately 77%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Union

In Union 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 Union.

Maximum UV Index Levels in Union for August

The chart shows the monthly maximum UV Index (UVI) for Union 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 Union typically reaches 11, which falls under the extreme exposure category.

Data source: Union 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 Union Compares to Other Months

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

This table compares monthly weather conditions in Union, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (48°F)	105 mm (4.1 inches)	85%	moderate
February Weather	12°C (54°F)	156 mm (6.1 inches)	84%	high
March Weather	16°C (60°F)	116 mm (4.6 inches)	82%	very high
April Weather	18°C (65°F)	136 mm (5.4 inches)	82%	extreme
May Weather	23°C (74°F)	122 mm (4.8 inches)	82%	extreme
June Weather	26°C (79°F)	163 mm (6.4 inches)	79%	extreme
July Weather	27°C (81°F)	121 mm (4.8 inches)	82%	extreme
August Weather	27°C (81°F)	127 mm (5.0 inches)	77%	extreme
September Weather	25°C (78°F)	95 mm (3.8 inches)	74%	very high
October Weather	20°C (69°F)	100 mm (3.9 inches)	73%	very high
November Weather	13°C (55°F)	70 mm (2.7 inches)	85%	high
December Weather	11°C (52°F)	121 mm (4.8 inches)	88%	moderate