The past few days have seen numerous record high temperatures either tied or set across the Midwestern US. Cedar Rapids, for example, tied their record high on Monday at 88°F with the previous record set in 1995. The featured map takes a look into the percentage of days with a high temperature record occurring over more than just one year. Rewording, the percentage of days with ties present. This is based on long term climate sites tracked by the NWS. There are some local quirks with some stations having a longer period of record and thus a higher chance of having ties, but the overall spatial trend is rather clear. The moderating effects of higher humidity levels and nearby bodies of water help to tighten the range of possible temperatures and create a higher chance of generating ties. High temperatures are more variable further inland with the lowest frequencies found over the most continental areas of the northern High Plains.