The relative humidity this morning was, *gasp*, 4%.
Went poking around on the National Weather Service site & finally found the kind of monthly weather data I was looking for:
Overall average highs and lows in May were seasonable. Average of 80/ lows 60s. But the month was really dry (rainfall down by half an inch): basically we got no significant rainfall. We had some record-breaking locally-specific winds ( the day that Gloria wondered if this wasn't what a hurricane was like, when they had to make the construction workers get off a building downtown). We had a freak late snowfall, and hit 100 degrees--breaking a record for the earliest that had happened since they've been keeping records at the Sunport (1930s). A moody, broody, petulant month. Yikes! Don't throw that smoldering butt out the window!!