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Climate in the Yuma Basin

Climate data from NOAA/NWS Co-op Network, Evaporation Pan and AZMET stations are complied in Table 7.11-1 and the locations are shown on Figure 7.11-3.  Figure 7.11-3 also shows precipitation contour data from the Spatial Climate Analysis Service (SCAS) at Oregon State University.  The Yuma Basin does not contain SNOTEL/ Snowcourse stations.  More detailed information on climate in the planning area is found in Section 7.0.3.  A description of climate data sources and methods is found in Volume 1, Appendix A.

NOAA/NWS Co-op Network

  • Refer to Table 7.11-1A
  • There are three NOAA/NWS Co-op network climate stations in the basin.  The average monthly maximum temperature occurs in July at all stations and ranges between 94.1°F at Yuma WSO AP and 89.6°F at Yuma Valley.  The average monthly minimum temperature occurs in December and ranges between 54.1°F at Yuma Citrus Station and 57.4°F at Yuma WSO AP.
  • Highest average seasonal rainfall occurs at most stations in the summer (July-September).  For the period of record used, the highest annual rainfall is 3.89 inches at the Yuma Citrus Station and the lowest is 2.63 inches at Yuma Valley.
  • This is the most arid basin in the state.

Evaporation Pan

  • Refer to Table 7.11-1B
  • There are two evaporation pan stations in the basin at elevations of 210 feet and 190 feet with an average annual evaporation of 122.5 inches and 99.21 inches respectively.


  • Refer to Table 7.11-1C
  • There are three AZMET stations in the basin at elevations ranging from 105 feet to 190 feet with average annual reference evaportranspiration of between 80.54 inches and 83.75 inches.

SCAS Precipitation Data

  • Refer to Figure 7.11-3
  • Additional precipitation data shows average annual rainfall of four inches or less in most of the basin and an average annual rainfall as high as six inches along the eastern basin boundary.

Click here for Table 7.11-1

Table 7.11-1 Climate Data for the Yuma Basin

Click here for Figure 7.11-3

Figure 7.11-3 Yuma Basin Meteorological Stations and Annual Precipitation


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