Thanks to weather.com, we can see that there's a 37% chance of showers in a particular hour. In that light, it seems quaint that we used to settle for rounded percentages over a wide swath of time. When I read a forecast on the air that called for a 60% chance of showers overnight, I'd sometimes think, "For all those hours, the chance is 60%? Obviously, that must vary over time, and there might be a much greater chance of rain at 3:30 this morning than 2:30."
Similarly, before digital displays on radios were common, FM stations typically rounded off their frequencies on the air. Listening to old air checks today, it stands out to hear KWMU identify itself as 91 FM instead of 90.7 FM or KEZK round its 102.5 frequency down to 102 FM.
Although precision is better, I like remembering a time when weather forecasts and radio stations had to just be reasonably--instead of precisely--accurate.