Is there any way I can predict fog

I do a lot of night hunting for varmits. Sometimes if it has rained the previous day I will get fog that evening. Although rain is not nessary for fog in my medow it seems to come and go as it pleases with the evening temp only having to drop a few degrees. It may appear many different times in a evening/night for no aparent reason, though I am sure there is one. As this is an hour drive from my home I would like to predict whether or not it would be a clear evening. Oh and sometimes there will not be fog anywhere else in that 1 hour drive. Seems to create its own weather, can you help?