I need to reference a range of temperatures and am not sure the best way to phrase this in a sentence. I am using these weather maps and need to explain the average range for high and low temps in April. The way it's currently written I find the plural of the temperature confusing but it cannot be removed since that would make the statement inaccurate and lead people to believe, for example, that 60 was the high temp when in reality it may have been 69.
My sentence currently reads: April is a transitional month for weather nationally with average lows ranging in the 20s-60s degrees ºF and highs ranging 40s-80s ºF.
I am also experimenting with removing the numeric characters and spelling them out if this makes it more clear: April is a transitional month for weather nationally with average lows ranging in the twenties-sixties and highs ranging forties-eighties degrees Fahrenheit.