I live in Reno, NV and it hasn't rained measurably in months, yet Rachio has has issued two rain skips in the last 10 days.
Last night I got a rain skip notification. It said 0.48" of rain was recorded at weather station KRNO (5 miles away). Curious to see if they got rain at the airport (the location of KRNO), I went to their web site (http://w1.weather.gov/obhistory/KRNO.html) and no rain has been recorded for days.
So why is Rachio issuing a rain skip?