Harper County Climate
Harper County, Oklahoma
Avg Annual Temp
57.9°F
Annual Precip
22.5"
Annual Snowfall
15.5"
Extreme Heat Days
98
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Harper County Weather
Cool and dry northern plains
Harper County is one of the state's coolest regions with a 57.9°F annual average. Its 22.5 inches of precipitation is significantly lower than the Oklahoma state average of 37.2 inches.
Cooler and drier than the state
Harper ranks as a cooler Oklahoma county, sitting 2.5 degrees below the state average of 60.4°F. It also receives nearly 15 inches less rain than the state norm.
A hub for winter snow
This county is much snowier than its southern neighbors, recording a significant 15.5 inches annually. Its 22.5 inches of rain makes it one of the driest counties in the state.
Vast temperature and weather swings
Harper experiences extreme swings, from 98 days of 90°F heat in summer to 15.5 inches of snow in winter. The January average drops to 34.7°F, reflecting its exposed northern location.
Plan for snow and sun
Residents need both heavy-duty snow removal equipment and efficient cooling for the 98 extreme heat days. Moisture-retaining soil additives can help gardens survive the dry 22.5-inch annual rainfall.
Frequently Asked Questions
What is the average temperature in Harper County?
How much rain does Harper County get?
Does it snow in Harper County?
How hot does Harper County get in summer?
How cold are winters in Harper County?
Track your own weather in Harper 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.