These nights, not much, but have a look at this chart and see what the theoretical possibilities are. It would be good to print this out and keep it handy. It’s one more good tool to have when trying to decide whether to drag the boat to a distant lake based on a local’s report and that night’s forecast.
Meanwhile, dry land iceboat training continues at Union Point, Mass.:
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Harry Bertino Photos
Chickawaukie Ice Boat Club 
Looks like fun. Wish we could find a large enough area here in NJ to indulge. How wide are the runner boards on these things?
The average temperature for yesterday can be heard on NOAA weather forecast at breakfast time and is likely findable on NOAA email forecast which contains hourly forecast of anything you can imagine, just dig around.