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Whitman County, WA (shown in white) has 2,159.26 mi² of land area and 18.63 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 518.4' to a high of 4,002.6', with a weighted average of 2,091.8' above sea level.
Temperatures range from average lows around 22.6°F to average highs around 89.2°F. A year-round daily temperature averages 49.3°F. Average annual precipation is 18.6". With these temperatures and precipation, the majority of the county scores as an 6B using the USDA Plant Hardiness Zone Map (the standard by which gardeners and growers can determine which perennial plants are most likely to thrive in a location).
The estimated population of Whitman County is 48,717 with 18,969 households. These households are spread across 17 unique municipalties (not all shown).