This year's Iowa caucuses could be the coldest GOP contest ever

Observed high and low temperatures in Des Moines, Iowa, during past GOP caucuses dates.

Table shows the high and low temperatures for each of the Iowa caucuses since 1976.

(Please use a modern browser to see the interactive version of this visualization)

Note: Jan. 15 temperature is a forecast.

Source: The Weather Channel Table: Matt Stiles, CNN