Fixes for the Arduino weather station project :
With reference to my previous post which outlines a few issues with the project results.
The line t = t* 9/5 + 32; converts from degrees Celsius to Fahrenheit replace this with t = t to keep the temperature as degrees Celsius.
If you are from a scientific background you may want to display in Kelvin, to do this
K = C + 273.15
Make sure you change the line that displays the temperature units to reflect what you are using
You should be able to work out how to apply this formula to the source code.
Fix 2 :
Add delay(1000); to the end of the loop to reduce flicker to a minimal level.