Want to know the temperature? Crickets can answer that question for you. I found out about this and thought I'd share it with you. It's interesting and I look forward to trying it out.
Count the chirps of a cricket.
For temperature in degrees...
Fahrenheit: Count the chirps in 14 seconds & add 37.
Celsius: Count the chirps in 25 seconds, divide by 3 & then add 4
I hope you try it and let me know if it worked for you. =)