Climate data from NOAA/NWS Co-op Network stations are complied in Table 7.8-1 and the locations are shown on Figure 7.8-3.  Figure 7.8-3 also shows precipitation contour data from the Spatial Climate Analysis Service (SCAS) at Oregon State University.  The San Simon Wash Basin does not contain Evaporation Pan, AZMET 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 7.8-1A
• There is one NOAA/NWS Co-op Network station in the basin, Sells, with a montly maximum temperature of 86.4°F and a monthly minimum temperature of 51.2°F.
• Highest average seasonal rainfall, 6.66 inches, occurs in the summer season (July-September) when 55% of the annual average precipitation occurs.

SCAS Precipitation Data

• Refer to Figure 7.8-3
• Additional precipitation data shows average annual rainfall as high as 32 inches along the eastern basin boundary in the Baboquivari Mountains and as low as eight inches along the border with Mexico and west and south of Hickiwan.

Table 7.8-1 Climate Data for the San Simon Wash Basin

Figure 7.8-3 San Simon Wash Meteorological Stations and Annual Precipitation

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References and Supplemental Reading for the San Simon Wash Basin