Humidity of a typical nice day?

Question

What is the humidity of a typically nice day? I have 20-25 degrees celcius but no idea what type of humidity is typical.

Answer 1

I always enjoy a 20 to 25 degree C day with a dew point at least 10 to 20 degrees C less than that of the temperature. An old rule of thumb is that if there is a 10 degree C spread between the temperature and the dew point, the relative humidity is half or around 50 percent. If there is a 20 degree C spread then it is halved again or 25 percent.

I have always been comfortable with the RH between 25 and 50 percent at temperatures of 20 to 30 degrees C.

Answer 2

Well, what is typical or normal varies by location.  And what people perceive as being pleasant or nice is subjective.  I think most people do not enjoy high humidity levels, so if you were to have a day with temperatures between 20-25 degrees (68-77F), typically you want a dewpoint (which measures the amount of moisture in the air) at or below 10C.  It is at about this dewpoint that most people would begin to notice a higher level of humidity.  This would equate to a relative humidity of 40-50%.