Grant County Climate
Grant County, Oklahoma
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
57.5°F
Annual Precip
34.4"
Annual Snowfall
9.6"
Extreme Heat Days
83
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
4,528
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Grant County
Climate Verdict
Grant County has a mild, with an average annual temperature of 57.5°F, moderate rainfall of 34.4 inches per year, significant summer heat with 83.4 days annually above 90°F, light snow averaging 9.6 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 33.9°F. summers are hot, with July averaging 81.2°F. The 47°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
Grant County closely matches the Oklahoma statewide average temperature of 60.4°F, it is somewhat drier than average for Oklahoma.
Climate Profile
About Grant County Weather
Cooler temperatures on the northern border
Grant County maintains a 57.5°F average annual temperature, which is significantly cooler than the Oklahoma state average. Its 34.4 inches of precipitation marks a transition into the more temperate northern plains.
Among Oklahoma's coolest counties
As one of the cooler counties in the state, Grant's 57.5°F average sits nearly three degrees below the state norm of 60.4°F. This makes it a distinct outlier compared to the sweltering counties in southern Oklahoma.
Coldest and snowiest in the region
Grant is significantly cooler and snowier than southern counties like Grady, recording 9.6 inches of snow compared to Grady’s 2.7. Its rainfall is comparable to central Oklahoma at 34.4 inches.
Defined by frosty winters
July temperatures average 81.2°F with 83 extreme heat days, while winters are much colder than the state average at 35.9°F. The county sees nearly 10 inches of snow, much higher than the state's southern regions.
Winterize for snow and cold
Heavy-duty insulation is vital to handle the colder 33.9°F January lows. Residents should also keep snow removal tools ready given the 9.6-inch annual snowfall.
Frequently Asked Questions
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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.