Arizona Climate Data, see below for individual cities

 Arizona annual average precipitation map

Arizona city precipitation totals

City

Avg Annual Precip

Avg Annual Snow

 Avg. # days 
of Precip

Avg # thunderstorm days

 Avg # hail days Avg # severe thunderstorm watches per year Avg # tornado watches per year # of tornadoes reported in county, 1960-2010
Flagstaff 22.91 100.2 82 62 5 2 0 31
Phoenix 8.29 0.0 36 23 1 4 0 50
Tuscon 12.17 1.2 53 42 1 3 0 19
Winslow 8.03 10.5 54 34 1 2 0 15
Yuma 3.01 0.0 17 19 0 2 0 10
  • Arizona Annual Precipitation Average - 13.61 in -  47th wettest in U.S.
  • Arizona Tornado Average - 3.5 per year - 33rd most in U.S.
  • Largest reported Tornado in Arizona from 1950-2011,  7/22/1984 - 2,600 yards / 1.47 miles wide
  • Dates with highest number of reported Tornadoes in Arizona from 1950-2011 - October 6th and July 18th, 8 tornadoes each day
  • Average time of occurrence of reported Tornadoes in Arizona from 1950-2011 - 2:48 pm
  • Arizona Annual Lightning Density - 5.7 flashes per square mile - 27th highest in U.S.
  • Record Driest year in Arizona from 1895-2011 - 1956, avg precipitation 6.17 inches 
  • Record Wettest year in Alabama from 1895-2011- 1905, avg precipitation 21.22 inches

Arizona Precipitation Data 

  • Driest location ranked by lowest average annual precipitation: Yuma Valley, southwest Arizona, 2.63"
  • Wettest location ranked by highest average annual precipitation: Hawley Lake, east-central Arizona, 39.62"
  • Snowiest location ranked by highest average annual snowfall: Sunrise Mountain, northeast Arizona, 243.0"
  • State precipitation record for 24 hours - Workman Creek, central Arizona, 9/5/1970, 11.40"
  • State precipitation record for 1 year - Hawley Lake, east-central Arizona, 1978, 58.92"
  • State snowfall record for 24 hours - Heber Ranger Station, northeast Arizona, 38.0" 
  • State snow record for 1 season - Sunrise Mountain, northeastern Arziona,1972-1973, 400.9"
  • Yuma in southwestern Arizona is the driest city in the United States with an average of only 3.01 
    inches of precipitation per year. Yuma is also the sunniest city with 90% of possible sunshine per year
  • Flagstaff in northern Arizona is the eighth snowiest city in the United States with an average of 100.2 inches
    of snow per year. This total is higher than several cities often thought of as receiving high amounts of snow -
    Buffalo, New York (95.7"), Duluth, Minnesota (83.3") and Juneau, Alaska (95.3")
Arizona temperature averages and extremes, Phoenix climate records and averages, precipitation and temperature
data for all U.S. states and Top 10 U.S. climate extremes

Data sources: National Climatic Data Center, Severe thunderstorm / tornado watch data period is 1999 - 2008, NOAA Storm Prediction Center,
Tornado climate data - NOAA Storm Prediction Center, State lightning flash density average - 1997-2011, Vaisala

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