Jawapan

2016-10-10T17:06:33+08:00
No it not so strong to forecast weather i think
2016-10-10T17:40:18+08:00
Mercury barometer can forecast the weather through measuring atmospheric pressure.

Measure the changes of pressure on barometer. 

If the changes is rising, meaning the air pressure is higher, and the weather is good 

If the changes is dropping/falling, air pressure is lower, the weather is bad.