The Des Moines Airport has yet to reach a sub freezing temperature, let alone a sub 50 degree temperature! If this holds for a few more days (thru 1 October), it would break the previous record for latest sub 50 degree temp set back in 1905. The featured chart displays the combination of first day below 50 and then the subsequent number of days until the first sub 32 temperature was recorded. The slanted lines are simply a convenience to bring the second date down to the timeline axis.

Voting:
Good = 6
Bad = 3
Abstain = 1