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Grayson County, TX (shown in white) has 932.83 mi² of land area and 46.37 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 492.1' to a high of 899', with a weighted average of 714.9' above sea level.
Temperatures range from average lows around 32.4°F to average highs around 94.4°F. A year-round daily temperature averages 63.9°F. Average annual precipation is 43.7". With these temperatures and precipation, the majority of the county scores as an 8A 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 Grayson County is 151,260 with 58,422 households. These households are spread across 18 unique municipalties (not all shown).