Harford County Climate
Harford County, Maryland
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
55.3°F
Annual Precip
47.7"
Annual Snowfall
—
Extreme Heat Days
31
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7b
Minimum winter temperature range for plant survival
3,825
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Harford County
Climate Verdict
Harford County has a mild, with an average annual temperature of 55.3°F, moderately wet with 47.7 inches of annual precipitation, occasional hot days — 31.15 per year above 90°F. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 33.0°F. summers are warm — July averages 77.5°F. The 45°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
Harford County closely matches the Maryland statewide average temperature of 55.9°F.
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 sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.