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Pinal AMA Climate

Climate data from NOAA/NWS Co-op Network and AZMET stations are complied in Table 8.2-1 and the locations are shown on Figure 8.2-3.  Figure 8.2-3 also shows precipitation contour data from the Spatial Climate Analysis Service (SCAS) at Oregon State University.  The Pinal AMA does not contain Evaporation Pan or SNOTEL /Snowcourse stations.  More detailed information on climate is found in Section 8.0.3.  A description of the climate data sources and methods is found in Volume 1, Appendix A.

NOAA/NWS Co-op Network

  • Refer to Table 8.2-1A
  • There are 11 NOAA/NWS Co-op Network stations in the AMA.  The average monthly maximum temperature occurs in July and is between 70.7°F and 91.1°F. The average monthly minimum temperature occurs in December or January and is between 41.3°F and 52.9°F.
  • The highest seasonal rainfall occurs at most stations in the summer (July-September).  For the period of record used, the highest average annual rainfall is 23.95 inches at the Kitt Peak station and the lowest is 6.11 inches at the Santa Rosa School station.


  • Refer to Table 8.2-1C
  • There are three AZMET stations in the AMA.  Elevation at the stations range from 1,184 feet to 1,512 feet and the corresponding annual average evaporation ranges from 79.84 inches to 77.33 inches.

SCAS Precipitation Data

  • See Figure 8.2-3
  • Additional precipitation data shows average annual rainfall as high as 30 inches on the AMA boundary near Kitt Peak and as low as six inches in the northwestern portion of the AMA near Maricopa.

Click to view Table 8.2-1

Table 8.2-1 Climate Data for the Pinal AMA

Click here to view Figure 8.2-3

Figure 8.2-3 Pinal AMA Meteorologic Stations and Annual Precipitation


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