Ann Arbor, MI Weather Forecast and Conditions - The Weather Channel | Weather.com 10 Day Ann Arbor, MI As of 3:59 am EDT 39° Fair Day 52° • Night 40° Watch: Firefighters Dispatched To. Find the most current and reliable hourly weather forecasts, storm alerts, reports and information for Ann Arbor, MI, US with The Weather Network. Ann Arbor, MI Hourly Weather | AccuWeather 3 AM 61° RealFeel® 60° 47% Cloudy Wind NE 5 mph Air Quality Poor Wind Gusts 6 mph Humidity 93% Indoor Humidity 72% (Slightly Humid) Dew Point.