skip to the content of this page Arizona's Official Website Arizona Department of Water Resources
Arizona Department of Water Resources Arizona's Official Web Site
Securing Arizona's Water Future

Tucson AMA Climate

Climate data from NOAA/NWS Co-op Network, Evaporation Pan and AZMET stations are complied in Table 8.5-1 and the locations are shown on Figure 8.5-3.  Figure 8.5-3 also shows precipitation contour data from the Spatial Climate Analysis Service (SCAS) at Oregon State University.  The Tucson AMA does not contain 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 8.5-1A
  • There are 16 NOAA/NWS Co-op Network stations in the AMA.  The average monthly maximum temperature occurs in July and is between 79.4°F and 88.5°F and the average monthly minimum temperature occurs in December or January and is between 46.9°F and 54°F.
  • The highest seasonal rainfall occurs at all stations in the summer (July-September).  For the period of record used, the highest average annual precipitation is 23.41 inches at the Santa Rita Exp Range station and the lowest is 11.38 at the Cortaro station.

Evaporation Pan

  • Refer to Table 8.5-1B
  • There are two Evaporation Pan stations in the AMA.  Elevation at the stations range from 2,300 feet to 2,435 feet and the corresponding annual average evaporation ranges from 111.1 inches to 103.5 inches.


  • Refer to Table 8.5-1C
  • There are two AZMET stations in the AMA.  Elevation at the stations range from 1,972 feet to 2,339 feet and the corresponding annual average evaporation rates are 81.56 inches and 76.92 inches.

SCAS Precipitation Data

  • See Figure 8.5-3
  • Additional precipitation data shows average annual rainfall as high as 38 inches on the AMA boundary at Mount Lemmon and as low as eight inches in the northwestern portion of the AMA near Marana.
  • The Tucson AMA has the widest precipitation range of any of the AMAs in the planning area.

Click to view Table 8.5-1

Table 8.5-1 Climate Data for the Tucson AMA

Click to view Figure 8.5-3

Figure 8.5-3 Tucson AMA Meteorologic Stations and Annual Precipitation


Arizona Water Atlas Home

Active Management Area Water Atlas Home

Download pdf of the Tucson AMA

Colorado River

Click to download Volume 8

Downtown Tucson
Sabino Canyon