SIOUX CITY (KTIV) - After a very long active-weather pattern last week, Siouxland finally catches a break Monday! A calm and sunny day is in store for Siouxland! Highs will be in the upper 80s to low 90s. Due to how humid it is, it may feel warmer with heat index values nearing the mid-to-upper 90s, so make sure to stay cool! Winds will be on the calm side. Monday's Forecast Calm conditions will last into Monday night. Lows will be in the upper 60s. Skies will be partly cloudy.