Delaware County Climate
Delaware County, Indiana
Avg Annual Temp
53.7°F
Annual Precip
41.0"
Annual Snowfall
19.4"
Extreme Heat Days
17.4
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Delaware County Weather
A Balanced Temperate Climate
Delaware County’s 53.7°F average temperature closely follows the national median. The county’s 41 inches of precipitation is slightly lower than the national average for this latitude.
Warmer than the State Average
At 53.7°F, Delaware is 1.5 degrees warmer than the Indiana state average of 52.2°F. It is drier than the typical Indiana county by nearly 3 inches of annual rainfall.
Central Indiana’s Heat Profile
The county experiences 17 days of extreme heat, significantly more than eastern neighbors like Dearborn. It records a moderate 19.4 inches of annual snowfall.
Hot Summers and Snowy Winters
July averages a warm 76.0°F, contributing to the 17 days of temperatures over 90°F. Winter averages 31.4°F and delivers a steady 19.4 inches of snow.
Balanced HVAC Planning Required
Residents must plan for both the 17 extreme heat days and 19.4 inches of snow. A versatile heating and cooling system is necessary to manage the 47.4-degree swing between January and July.
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.