Dimmit County Climate
Dimmit County, Texas
Avg Annual Temp
70.6°F
Annual Precip
19.6"
Annual Snowfall
0.1"
Extreme Heat Days
152.9
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Dimmit County Weather
Intense Heat in the Rio Grande Plain
Dimmit County is exceptionally hot compared to the national median, with an annual average temperature of 70.6°F. It is a dry region, receiving only 19.6 inches of precipitation annually.
Far Hotter and Drier Than Texas Averages
Dimmit sits 5.1 degrees above the Texas average temperature and receives about 12 inches less rain than the state norm. This makes it one of the more extreme environments in the state for heat and aridity.
A Core Piece of the Winter Garden Region
Similar to its neighbor Webb County, Dimmit faces grueling summer heat. It is notably drier than counties to its east, relying more on irrigation for its famous agricultural output.
Five Months of Extreme Summer Heat
The county experiences a staggering 153 days of temperatures at or above 90°F annually. Winters are very brief and mild, with a January average of 52.0°F and practically no snowfall.
Invest in High-Performance Summer Gear
With 153 days of extreme heat, residents must prioritize heavy-duty HVAC maintenance and sun protection. Water storage and efficient irrigation are vital given the low 19.6-inch annual rainfall.
Frequently Asked Questions
What is the average temperature in Dimmit County?
How much rain does Dimmit County get?
Does it snow in Dimmit County?
How hot does Dimmit County get in summer?
How cold are winters in Dimmit County?
Track your own weather in Dimmit 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.