Putnam County Climate
Putnam County, Ohio
Avg Annual Temp
51.3°F
Annual Precip
38.3"
Annual Snowfall
21.6"
Extreme Heat Days
14.1
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Putnam County Weather
Drier and Cooler Than the National Average
Putnam County’s annual average temperature of 51.3°F is lower than the U.S. median. The county receives 38.3 inches of precipitation, which is drier than many other parts of the humid Midwest. This creates a crisp, continental climate with moderate rainfall.
Drier Than the Typical Ohio County
Putnam is notably drier than the state average, receiving 38.3 inches of rain compared to Ohio’s 41.2 inches. Its temperature of 51.3°F is almost identical to the state average of 51.5°F. This makes Putnam one of the less humid areas in the state.
Snowier Than Neighboring Preble County
Putnam County receives 21.6 inches of snow annually, nearly 10 inches more than Preble County to its south. Despite the extra snow, it receives less total precipitation, making it a drier overall environment. Summer heat is similar across both counties, with Putnam recording 14 extreme heat days.
Cold Winters and Frequent Heat Spikes
Putnam winters are chilly, with a January average of 26.4°F and over 21 inches of snow. Summers are warm and see 14 days where temperatures exceed 90°F, peaking with a July average of 73.9°F. The winter average stays below freezing at 29.1°F.
Ready the Snow Shovels and AC
Homeowners should prepare for nearly two feet of annual snow with reliable shovels or blowers. Cooling systems are necessary for the 14 days of extreme summer heat. Because the area is drier than its neighbors, supplemental watering for gardens may be needed in July.
Frequently Asked Questions
What is the average temperature in Putnam County?
How much rain does Putnam County get?
Does it snow in Putnam County?
How hot does Putnam County get in summer?
How cold are winters in Putnam County?
Track your own weather in Putnam County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.