Harford County Climate
Harford County, Maryland
Avg Annual Temp
55.3°F
Annual Precip
47.7"
Annual Snowfall
—
Extreme Heat Days
31.15
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Harford County Weather
A Warm Humid Subtropical Profile
Harford County's 55.3°F average annual temperature sits comfortably above the national median. The region receives 47.7 inches of annual precipitation, which is significantly wetter than the average American county.
Cooler Than the Maryland Average
The county is slightly cooler than the Maryland state average of 55.9°F. It maintains a more temperate profile compared to the warmer counties on the Eastern Shore.
Similar to Central Maryland Neighbors
Harford's climate closely mirrors Montgomery County, which averages 55.1°F. However, Harford experiences 31 days of extreme heat, nearly double the 18 days seen in Montgomery.
Hot Summers and Brisk Winters
July brings an average high of 77.5°F, while January temperatures dip to a 33.0°F average. Residents face about 31 days each year where temperatures exceed 90°F.
Prepare for Humidity and Heat
Ensure your HVAC system is ready for a full month of extreme summer heat. Because snowfall data is limited, maintain a flexible winter kit for variable coastal conditions.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.