Harmon County Climate
Harmon County, Oklahoma
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
60.4°F
Annual Precip
25.9"
Annual Snowfall
3.3"
Extreme Heat Days
101
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7b
Minimum winter temperature range for plant survival
5,099
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Harmon County
Climate Verdict
Harmon County has a warm, averaging 60.4°F year-round, moderate rainfall of 25.9 inches per year, significant summer heat with 101.3 days annually above 90°F, light snow averaging 3.3 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 38.0°F. summers are hot, with July averaging 83.0°F. The 45°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Summer outdoor activities should be planned for early morning or evening to avoid extreme heat.
Regional Context
Harmon County closely matches the Oklahoma statewide average temperature of 60.4°F, it is also noticeably drier, receiving 11.3 inches less precipitation than the state average, the county experiences 24.889050925925886 more extreme heat days than the state average.
Climate Profile
About Harmon County Weather
Dry heat in the southwest
Harmon County sits exactly at the Oklahoma state average of 60.4°F for annual temperature. Its climate is defined by aridity, receiving only 25.9 inches of annual precipitation.
Perfectly average temperature, below average rain
Harmon perfectly mirrors the statewide temperature average of 60.4°F. While its temperature is standard, its low rainfall of 25.9 inches puts it among the state's driest regions.
Drier than its neighbors
Harmon is even drier than neighbor Greer County, with about an inch less rain per year. It is one of the few counties in the region to break the 100-day mark for extreme heat.
Triple-digit heat days
Heat is the dominant story here, with 101 days reaching at least 90°F every year. Winters are manageable, featuring a 39.6°F average and only 3.3 inches of snowfall.
Prioritize water and sun safety
With over 100 days of extreme heat, efficient air conditioning and sun protection are essential. Residents should also plan for water conservation given the low 25.9-inch annual rainfall.
Frequently Asked Questions
What is the average temperature in Harmon County?
How much rain does Harmon County get?
Does it snow in Harmon County?
How hot does Harmon County get in summer?
How cold are winters in Harmon County?
Track your own weather in Harmon 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.