Alpena weather in August 2025

Expect 77°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Alpena in August. Check more long-term weather averages for Alpena in August before you book your next holiday to Michigan in 2025/2026.

  • 77°F maximum daytime temperature in August in Alpena77
    77°F max day temperature
  • 8 hours of sunshine per day
  • 11 days with some rainfall in August in Alpena11
    11 days with some rainfall
  • 54°F minimum night-time temperature in August in Alpena54
    54°F min night temperature
  • 14 hours of daylight per day in August in Alpena14
    14 hours of daylight per day
  • No heat & humidity in August in Alpena0
    No heat & humidity
  • 3.3 inches monthly rainfall in August in Alpena3.3
    3.3 inches of monthly rainfall
  • UV (maximum) index 7 (High) in August in Alpena7
    7 (High) UV index
  • 64°F sea temperature in August in Alpena64
    64°F sea temperature

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The August weather guide for Michigan (Alpena) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How hot is it in Alpena in August?

Daytime temperatures usually reach 77°F in Alpena in August with no heat and humidity, falling to 54°F at night.

How sunny is it in Alpena in August?

There are normally 8 hours of bright sunshine each day in Alpena in August - that's 59% of daylight hours.

How warm is the sea around Alpena in August?

The average sea temperature around Alpena in August is 64°F.

Does it rain in Alpena in August?

There are usually 11 days with some rain in Alpena in August and the average monthly rainfall is 3.3 inches.

Alpena August sunrise & sunset times

Browse the sunrise and sunset times for Alpena in August 2025. Select a month to view Alpena sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:19 20:00
Saturday, 16th August 2025 05:37 19:38
Sunday, 31st August 2025 05:55 19:12

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