Temperatures

When Joe drove to work each day,he passed a sign that displayed the current temperature in both Fahrenheit and Celsius.

On one very warm morning he noticed that the Fahrenheit and Celsius temperatures had the same two digits, but reversed.

That evening it had become rainy and much cooler.  When he passed the sign, he noticed that the temperatures again had the same two digits, but reversed

What were the temperatures that were displayed on the sign? (Hint: round you answers to the nearest degree.)