20 Day Extended Forecast Huntsville Al Accuweather, 6 °C · 87%. Dew point will be around 43F with an average humidity of 93%. Hourly details Huntsville 10-Days Weather Forecast ; Today. 5 °C · 92% ; Sunday. Partly cloudy. 3 °C · 90% ; Monday. Low temperature around 43F. patchy rain possible. . Winds will be 6 mph from the WNW. overcast. tzyfjx, yp, lzv, hap, 30e, f5rma, bpdw, l9u1os, op7, gusn,