2007-02-05 17:23:45 · 5 answers · asked by Eureka! 4 in Science & Mathematics ➔ Weather
1. Use the temperature to find the saturation vapor pressure.
2. Use the relative humidity to find the actual vapor pressure.
3. Use the actual vapor pressure to use the dewpoint.
The formulas seemed complicated, but they are in the source, about halfway down the page, if you need to look them up.
2007-02-06 01:56:33 · answer #1 · answered by wdmc 4 · 0⤊ 0⤋
Well you really need to know what the numbers represent before you can find the relative humidity. To find the relative humidity, you take the actual vapor density and divide it by the saturation vapor density and times your answer by 100. I'm assuming if they're taking a difference of the two numbers, then they are telling you the temperature and dewpoint. If the temperature is 75 and the dewpoint is 64, then the relative humidity is 61.96%
2016-05-23 22:39:40 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Look up "dew point" in Wikipedia.org. They show the entire formula for the calculations you're looking for. They're kinda complicated.
2007-02-05 17:30:18 · answer #3 · answered by sfsfan1 2 · 0⤊ 0⤋
It requires tables or a graph. The mathematics is non-trivial.
2007-02-05 17:31:26 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Why calculate it...
Watch the Weather Channel, they will tell you.
2007-02-05 17:27:03 · answer #5 · answered by Anonymous · 0⤊ 0⤋