Winter

• The winters in Phoenix, Arizona, are very mild. It does not snow in Phoenix. The average high in the winter is in the high 60s, and the lows average in the low 40s. It rarely dips below freezing. There are mild winter storms which bring rain to Phoenix in the winter, but Phoenix sees less than eight inches of rain most years.
  
  

Summer

• Lightning makes for a pretty show in Phoenix during the monsoons.lightning image by Sandra Henderson from Fotolia.com
  
  "It's a dry heat" is a pretty common phrase heard around Arizona in the summertime, which does indeed have very low humidity. The average high is around 104 degrees during the summer, but it is not uncommon to see temperatures above 110. The lows drop down into the 70s and 80s at night.
  
  The monsoon season runs from June 15 to September 30. Arizona monsoons are characterized be strong winds, lightning, thunder and sudden downpours of rain. The monsoons are usually brief, and tend to occur in the early evenings during the season.
  
  

Spring and Fall

• Spring and fall in Phoenix tend to seem very similar and relatively mild. The highs during both season stay in the 80s, although it often gets into the 90s during both May and September. The lows stay well above freezing, dipping as low as the 50s at night.