Hancock County Climate
Hancock County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
45.5°F
Annual Precip
34.7"
Annual Snowfall
35.3"
Extreme Heat Days
8
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
2,691
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Hancock County
Climate Verdict
Hancock County has a cool, averaging 45.5°F annually, moderate rainfall of 34.7 inches per year, rare extreme heat with only 8.3 days above 90°F annually, moderate snowfall of 35.3 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 15.0°F. summers are warm — July averages 72.2°F. Residents experience a substantial 57°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Hancock County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Hancock County closely matches the Iowa statewide average temperature of 48.0°F.
Climate Profile
About Hancock County Weather
Hancock’s Cool Continental Climate
With an average annual temperature of 45.5°F, Hancock County sits significantly cooler than the national median. This humid continental climate features sharp seasonal shifts and stays roughly 2.5 degrees below the Iowa state average.
Below the Iowa Temperature Average
Hancock ranks as one of the cooler territories in the state, falling below the Iowa average annual temperature of 48.0°F. The county also sees slightly less precipitation than the state norm, recording 34.7 inches annually compared to the statewide 36.1 inches.
Coldest Among North-Central Neighbors
Hancock remains colder than neighboring Humboldt County, which averages 46.2°F annually. While both regions face harsh winters, Hancock’s annual average reflects its position as a more northern, frigid pocket of the Iowa plains.
Deep Freezes and Mild Summers
Winters are intense with a January average of 15.0°F and 35.3 inches of annual snowfall. Summers remain relatively comfortable, seeing only 8 days above 90°F and an average July temperature of 72.2°F.
Prioritize Insulation and Winter Readiness
Residents should invest in high-efficiency heating systems to handle winter averages of 18.5°F. While extreme heat is rare, the 34.7 inches of rain and significant snowfall require robust gutter systems and reliable snow removal equipment.
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.