Count The Chirps Of A Cricket To Get The Temperature

I had no idea about this..Very interesting.  Does it really work?

"Did you know that you can tell the temperature by counting the chirps of a cricket? It's true! Here's the formula:

To convert cricket chirps to degrees Fahrenheit, count number of chirps in 14 seconds then add 40 to get temperature.

Example: 30 chirps + 40 = 70° F
To convert cricket chirps to degrees Celsius, count number of chirps in 25 seconds, divide by 3, then add 4 to get temperature.
Example: 48 chirps /(divided by) 3 + 4 = 20° C"

Source:
http://www.almanac.com/cricket-chirps-temperature-thermometer