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Armstrong County, PA (shown in white) has 653.32 mi² of land area and 10.65 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 800.5' to a high of 1,614.2', with a weighted average of 1,211.7' above sea level.
Temperatures range from average lows around 16.3°F to average highs around 84.2°F. A year-round daily temperature averages 49.9°F. Average annual precipation is 48.2". 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 Armstrong County is 64,145 with 27,470 households. These households are spread across 24 unique municipalties (not all shown).