Monday was another steamy hot day with heat index values again over 100°F for most of the state. The featured chart looks into the yearly maximum heat index value for Ames during the month of June. The top panel shows the frequency at or above the given threshold. The bottom panel shows the yearly maximum value for each June. The 2026 value of 106°F (so far) comes in at about a one in five year frequency. There is plenty more hot weather to go this week, but humidity levels are expected to drop a bit to make things a little less insufferable for Tuesday.