30-year climate normals

Dimmit County Climate and Weather Averages

Hottest month — August

99.9°

average daily high. The coldest month is January, averaging a low of 37.4°F.

Dimmit County gets 19.57" of precipitation a year, and 34% of it falls in Aug, Sep, Oct.

Temperature through the year

Each bar spans the average daily low to the average daily high for that month.

Month	Avg high	Avg low	Precip
January	66.6°	37.4°	0.98"
February	71.3°	42.1°	0.76"
March	78.2°	49.7°	1.33"
April	86.1°	57.3°	1.15"
May	91.9°	65.9°	2.92"
June	97.6°	71.7°	1.83"
July	99.1°	73.0°	1.74"
August	99.9°	73.5°	1.41"
September	93.4°	68.2°	3.28"
October	85.6°	58.6°	2.05"
November	75.0°	47.2°	1.15"
December	67.1°	38.7°	0.97"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 34% falling in the wettest three months (Aug, Sep, Oct).

January 0.98"

February 0.76"

March 1.33"

April 1.15"

May 2.92"

June 1.83"

July 1.74"

August 1.41"

September 3.28"

October 2.05"

November 1.15"

December 0.97"

Annual total 19.57"

What this climate costs you

Degree days measure how hard a building has to work to stay comfortable. They are the reason two identical houses have very different power bills, and they are the link between the weather here and what you pay every month.

Cooling degree days How much air conditioning the climate demands 3,494

Heating degree days How much heating the climate demands 1,414

Approximate annual cooling cost At 16.44¢/kWh, Texas average $574

Approximate annual electric heating cost Lower where heating is gas rather than electric $81

These are rough planning figures from degree days and the state electricity price, not a bill estimate. House size, insulation and fuel type move them a lot. See the full cost of owning a home in Dimmit County, where electricity is one line of eight.

Common questions

What is the weather like in Dimmit County?

Dimmit County averages a high of 99.9°F in August and a low of 37.4°F in January. Annual precipitation is 19.57 inches, with essentially no snow.

When is the rainy season in Dimmit County?

The wettest stretch is Aug, Sep, Oct, which accounts for 34% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Dimmit County?

The average daily high in August, the hottest month, is 99.9°F. That drives 3,494 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Dimmit County?

Effectively no. Measurable snowfall is rare in Dimmit County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station CARRIZO SPRINGS 3S, TX US (USC00411486), 8 miles from the county centroid.
Heating and cooling degree days — NOAA, same station and period.
Electricity price — US Energy Information Administration, Electric Power Monthly Table 5.6.A, Texas residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.