Grant County Climate
Grant County, Oklahoma
Avg Annual Temp
57.5°F
Annual Precip
34.4"
Annual Snowfall
9.6"
Extreme Heat Days
83.4
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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
What is the average temperature in Grant County?
How much rain does Grant County get?
Does it snow in Grant County?
How hot does Grant County get in summer?
How cold are winters in Grant County?
Track your own weather in Grant 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.