Hydrogen porxcide in a spray bottle and get on the trail ASAP go slow and glass ahead . the deer will bed up closer and with the rain you can sneak in close once the deer is in sightyou make a choice,if the deer was hit good back off and wait for a hour if it was hit bad wait till the next morning If hit real bad sneak in and shoot again

I'll hunt in the rain. Like others said, just make sure it's a 110% slam dunk double lung and blood trail or not you'll find the deer nearby.