August Weather in Heppner, United States

Last updated: June 24, 2025

The average temperature in Heppner, United States during August is a pleasant 22°C (71°F). Expect a minimum of 6°C (43°F) and a maximum of 38°C (100°F), making for quite a range. Additionally, prepare for 10 mm (0.4 in) of precipitation spread over about 2 days. With an average humidity of 60%, you'll experience a comfortably humid atmosphere.

August Temperature in Heppner

In August in Heppner, the average temperature is 22°C (71°F). Maximums can reach 38°C (100°F), and minimums can be as low as 6°C (43°F). This makes it essential for travelers to pack for a range of temperatures to ensure comfort during their stay.

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

The chart illustrates August temperature patterns in Heppner, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Heppner, August typically has an average temperature of 22°C (71°F), with highs reaching up to 38°C (100°F) and lows dropping to around 6°C (43°F).

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

August Precipitation in Heppner

In Heppner in August, the precipitation amount is 10 mm (0.4 in) over a period of 2 days.

August Precipitation Trends in Heppner

The chart displays monthly precipitation patterns in Heppner, 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 Heppner, August typically receives around 10 mm (0.4 inches) of precipitation spread over approximately 2 days.

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

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Millimeters (mm) Inches (in)

August Humidity in Heppner

In Heppner in August, humidity is 60%. With an average temperature of 22°C (71°F), this humidity feels like a warm embrace, making it ideal for exploring outdoor attractions but a bit sticky for prolonged activities.

August Average Humidity in Heppner

This chart illustrates the average monthly humidity levels in Heppner, 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 Heppner is approximately 60%, 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 Heppner

In Heppner in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Heppner.

Maximum UV Index Levels in Heppner for August

The chart shows the monthly maximum UV Index (UVI) for Heppner 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 Heppner typically reaches 9, which falls under the very high exposure category.

Data source: Heppner 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 Heppner Compares to Other Months

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

This table compares monthly weather conditions in Heppner, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (33°F)	60 mm (2.3 inches)	86%	moderate
February Weather	0°C (33°F)	85 mm (3.3 inches)	86%	moderate
March Weather	4°C (39°F)	69 mm (2.7 inches)	85%	high
April Weather	8°C (46°F)	69 mm (2.7 inches)	83%	very high
May Weather	12°C (55°F)	47 mm (1.8 inches)	77%	very high
June Weather	17°C (63°F)	27 mm (1.1 inches)	81%	very high
July Weather	22°C (72°F)	2 mm (0.1 inches)	76%	very high
August Weather	22°C (71°F)	10 mm (0.4 inches)	60%	very high
September Weather	16°C (61°F)	27 mm (1.1 inches)	58%	very high
October Weather	9°C (48°F)	46 mm (1.8 inches)	75%	moderate
November Weather	4°C (39°F)	65 mm (2.5 inches)	85%	moderate
December Weather	0°C (33°F)	61 mm (2.4 inches)	87%	low