Climate data from NOAA/NWS Co-op Network stations are complied in Table 7.10-1 and the locations are shown on Figure 7.10-3.  Figure 7.10-3 also shows precipitation contour data from the Spatial Climate Analysis Service (SCAS) at Oregon State University.  The Western Mexican Drainage 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 7.10-1A
• There is one NOAA/NWS Co-op Network station in the basin, Organ Pipe Cactus N.M., with a monthly maxiumum temperature of 89.2°F in July and an monthly minimum temperature of 54.7°F in January.
• Highest average seasonal rainfall, 4.38 inches, occurs in the summer season (July-September) when 44% of the annual average precipitation occurs.

SCAS Precipitation Data

• Refer to Figure 7.10-3
• Additional precipitation data shows average annual rainfall as high as 14 inches along the northeastern basin boundary and as low as four inches in the western portion of the basin.

Table 7.10-1 Climate Data for the Western Mexican Drainage Basin

Figure 7.10-3 Western Mexican Drainage Basin Meteorological Stations and Annual Precipitation

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References and Supplemental Reading for the Western Mexican Drainage Basin