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Climate in the Gila Bend Basin

Climate data from NOAA/NWS Co-op Network and AZMET stations are complied in Table 7.2-1 and the locations are shown on Figure 7.2-3.  Figure 7.2-3 also shows precipitation contour data from the Spatial Climate Analysis Service (SCAS) at Oregon State University.  The Gila Bend Basin does not contain Evaporation Pan or 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 7.2-1A
  • There is one NOAA/NWS Co-op Network station in the basin, Gila Bend, with an average monthly maximum temperature of 94.1°F in July and an monthly minimum temperature of 55.0°F in December and January.
  • Highest average seasonal rainfall, 2.49 inches, occurs in both the summer (July-September) and fall (October-December) seasons when 66% of the annual average precipitation occurs.


  • Refer to Table 7.2-1C
  • There is one evaporation pan station in the basin, Paloma.  This pan is at 719 feet and has an annual evaporation rate of 75.27 inches.

SCAS Precipitation Data

  • See Figure 7.2-3
  • Additional precipitation data shows average annual rainfall as high as 14 inches at the southeastern tip of the basin and as low as four inches along the western basin boundary.



Click here for Table 7.2-1

Table 7.2-1 Climate Data for the Gila Bend Basin

Click here for Figure 7.2-3

Figure 7.2-3 Gila Bend Basin Meteorological Stations and Annual Precipitation

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References and Supplemental Reading for the Gila Bend Basin

Colorado River
Lower Colorado River Planning Area
Click to download Volume 7
Gillespie Dam
Agriculture near Town of Gila Bend