Rain gauge ? I just check how much is in a 5 gallon bucket . I always have one or more sitting out . Except Saturday nights rain had wind and blew it over .
That is a good plan but I use my 5 gallon buckets I have sitting around to raise mosquitoes and I can never be sure of the level of the water before the rain, as I never know how much water the Skeeter Larvae drank the day before the rain,