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San Mateo County, CA (shown in white) has 448.61 mi² of land area and 292.34 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 0' to a high of 2,598.4', with a weighted average of 383.5' above sea level.
Temperatures range from average lows around 40.6°F to average highs around 79.3°F. A year-round daily temperature averages 57.5°F. Average annual precipation is 27.4". With these temperatures and precipation, the majority of the county scores as an 10A 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 San Mateo County is 746,678 with 263,045 households. These households are spread across 33 unique municipalties (not all shown).
