Black Hawk County Climate
Black Hawk County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
49.0°F
Annual Precip
36.3"
Annual Snowfall
39.1"
Extreme Heat Days
15
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
3,194
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Black Hawk County
Climate Verdict
Black Hawk County has a cool, averaging 49.0°F annually, moderate rainfall of 36.3 inches per year, rare extreme heat with only 15.3 days above 90°F annually, moderate snowfall of 39.1 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 19.4°F. summers are warm — July averages 74.5°F. Residents experience a substantial 55°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Black Hawk County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Black Hawk County closely matches the Iowa statewide average temperature of 48.0°F.
Climate Profile
About Black Hawk County Weather
Higher Precipitation than National Median
Black Hawk County maintains a 49.0°F average, which is warmer than northern Iowa but below the national median. It receives a typical 36.3 inches of annual precipitation.
Warmer than the State Benchmark
It is one degree warmer than the Iowa state average of 48.0°F. This puts it in the warmer tier of the state's northern-central counties.
Heavy Snowfall Compared to the South
It is notably snowier than southern neighbors, recording 39.1 inches of snow. Its temperature profile is very similar to Adair County.
Significant Snow and Mid-Summer Heat
Snowfall is a major factor here, averaging nearly 40 inches per year. Summer includes 15 days of extreme heat, with July temperatures peaking at 74.5°F.
Invest in High-Capacity Snow Gear
High-capacity snow removal equipment is a necessity for the heavy 39.1-inch average snowfall. Expect significant heating bills during the 22.9°F winter months.
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.