August Weather in Alpena, United States

Last updated: June 24, 2025

In August, the average temperature in Alpena, United States hovers around 20°C (68°F), offering a comfortable climate for outdoor activities. Expect minimum temperatures to dip to 8°C (48°F), while warm days can soar up to 31°C (87°F). With an average humidity of 75%, the region experiences a pleasant, albeit slightly humid atmosphere. However, be prepared for occasional showers, as precipitation amounts reach about 84 mm (3.3 in) over 12 days throughout the month.

August Temperature in Alpena

In August in Alpena, the average temperature is 20°C (68°F). The maximum can reach 31°C (87°F) and the minimum can be as low as 8°C (48°F). This makes it a great time for travelers to enjoy a comfortable climate, suitable for outdoor activities and sightseeing.

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

The chart illustrates August temperature patterns in Alpena, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alpena, August typically has an average temperature of 20°C (68°F), with highs reaching up to 31°C (87°F) and lows dropping to around 8°C (48°F).

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

August Precipitation in Alpena

In Alpena in August, the precipitation amount is 84 mm (3.3 in) over a span of 12 days.

August Precipitation Trends in Alpena

The chart displays monthly precipitation patterns in Alpena, 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 Alpena, August typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 12 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 Alpena

In Alpena in August, humidity is 75%. With an average temperature of 20°C (68°F), this humidity feels like a warm, muggy embrace that can leave travelers feeling sticky and exhausted.

August Average Humidity in Alpena

This chart illustrates the average monthly humidity levels in Alpena, 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 Alpena is approximately 75%, 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 Alpena

In Alpena in August, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Alpena.

Maximum UV Index Levels in Alpena for August

The chart shows the monthly maximum UV Index (UVI) for Alpena 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 Alpena typically reaches 8, which falls under the very high exposure category.

Data source: Alpena 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 Alpena Compares to Other Months

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

This table compares monthly weather conditions in Alpena, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	52 mm (2.0 inches)	92%	low
February Weather	-5°C (23°F)	56 mm (2.2 inches)	91%	moderate
March Weather	-1°C (31°F)	61 mm (2.4 inches)	87%	moderate
April Weather	4°C (39°F)	94 mm (3.7 inches)	85%	high
May Weather	10°C (51°F)	84 mm (3.3 inches)	79%	very high
June Weather	16°C (61°F)	91 mm (3.6 inches)	75%	very high
July Weather	20°C (69°F)	86 mm (3.4 inches)	75%	very high
August Weather	20°C (68°F)	84 mm (3.3 inches)	75%	very high
September Weather	16°C (61°F)	77 mm (3.0 inches)	79%	high
October Weather	10°C (50°F)	108 mm (4.3 inches)	85%	moderate
November Weather	3°C (37°F)	67 mm (2.6 inches)	88%	moderate
December Weather	-2°C (29°F)	62 mm (2.4 inches)	89%	low