Ogle County Climate
Ogle County, Illinois
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
48.6°F
Annual Precip
38.4"
Annual Snowfall
—
Extreme Heat Days
14
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5b
Minimum winter temperature range for plant survival
2,950
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Ogle County
Climate Verdict
Ogle County has a cool, averaging 48.6°F annually, moderate rainfall of 38.4 inches per year, rare extreme heat with only 13.5 days above 90°F annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 20.9°F. summers are warm — July averages 72.4°F. Residents experience a substantial 52°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Ogle County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Ogle County is 4.2°F cooler than the Illinois statewide average of 52.8°F, it is somewhat drier than average for Illinois.
Climate Profile
About Ogle County Weather
Cooler Than the National Median
Ogle County’s 48.6°F annual average makes it significantly cooler than the national median temperature. It experiences a shorter growing season with 38.4 inches of annual precipitation.
Among the State's Cooler Counties
At 48.6°F, Ogle is 4.2 degrees cooler than the Illinois state average of 52.8°F. This reflects the harsher winters and cooler summers typical of northern Illinois.
Milder Heat Than Central Illinois
The county experiences only 14 extreme heat days, far fewer than the 23 seen in Peoria County. This makes Ogle a refuge for those seeking to avoid intense summer humidity.
Cold Winters and Pleasant Summers
January is cold with an average of 20.9°F, while summer highs stay moderate with a July average of 72.4°F. The county only reaches 90°F about 14 days per year.
Winterize for Significant Cold
Superior home insulation and heavy winter gear are vital for the 24.1°F winter average. Air conditioning is less of a priority here than in the southern parts of the state.
Frequently Asked Questions
What is the average temperature in Ogle County?
How much rain does Ogle County get?
How hot does Ogle County get in summer?
How cold are winters in Ogle County?
Track your own weather in Ogle County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.