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Jerome County, ID (shown in white) has 597.54 mi² of land area and 4.98 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 2,998.7' to a high of 4,662.1', with a weighted average of 3,992.4' above sea level.
Temperatures range from average lows around 18.9°F to average highs around 92.4°F. A year-round daily temperature averages 49.5°F. Average annual precipation is 10". With these temperatures and precipation, the majority of the county scores as an 6A 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 Jerome County is 25,350 with 8,475 households. These households are spread across 3 unique municipalties (not all shown).