What’s Happening in the Sonoran Desert During the Month of September!

What’s Happening in the Sonoran Desert During the Month of September!

September is a month of transition form hot and wet… to hot and dry! With the end of the rains vibrant expressions of life are on the move! Check out what’s happening this month in the Sonoran Desert:


  • Prickly pear cactus fruit are ripe and ready for tortoises, javelina, mule deer, many species of birds, and people!
  • Mesquites and acacias droop with drying ripe bean pods
  • Ocotillos are ending their leafy green garb and providing a desert’s expression of fall colors!


  • Regal horned lizards hatch in desertscrub up into grassland foothills
  • Hummingbird feeders across the region are drained nightly as lesser long-nosed and Mexican long-tounged bats refuel on migration
  • Iridescent green fig beetles abound in the humid September air sniffing out ripe, fermenting fruit and mates!
  • Look for renewed butterfly activity after the rains! Bright cloudless sulphurs and American snout are very conspicuous as they migrate with the summer rain bounty.


Only a third of the days in September will be piled high with storm clouds. Half of those days will see thunderstorms; the other half just a bit of rain. Humidity will be high and the temperatures will climb to the high 90s in the desert before plummeting with the rainfall in the afternoon. Be aware of lightening and flash flooding!

Know of other natural events happening this month?? Share them with us on Social media or shoot us an email at admin@ironwoodtreeexprience.org.

-Happy Exploring Everyone –