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Jefferson County, PA (shown in white) has 652.44 mi² of land area and 4.36 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 1,099.1' to a high of 2,099.7', with a weighted average of 1,569.5' above sea level.
Temperatures range from average lows around 15.6°F to average highs around 81.1°F. A year-round daily temperature averages 48.1°F. Average annual precipation is 45.3". With these temperatures and precipation, the majority of the county scores as an 5B 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 Jefferson County is 43,885 with 18,472 households. These households are spread across 12 unique municipalties (not all shown).
