It was 90 degrees F last week, but South Dakota could see nighttime temperatures below 32 degrees anytime.
In 1987 the temperature to dipped to 32 degrees of Aug. 31 in Aberdeen.
You can check out freeze dates for your locations at climate.sdstate.edu/w_info/frost/frost.shtm.
The data goes back to 1893 for a few locations.
You see how many more growing degree days you can expect to these freeze dates at the Web site: climate.sdstate.edu/coop/gddtillfreezing2.asp.
Use the data on this page to calculate how many GDDs you are likely to get based on temperatures and early or late freeze date.
Source: SDSU AgBio Communications provided information for this article