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United States › Texas › Harris County › Climate Station HOUSTON INTERCONT AP, TX US Distance 8.7 mi Normals 1991–2020

30-year climate normals

Harris County Climate and Weather Averages

Hottest month — August

94.9°

average daily high. The coldest month is January, averaging a low of 43.7°F.

Harris County gets 51.84" of precipitation a year, and 29% 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.

60° 80° JanFebMarAprMayJunJulAugSepOctNovDec
MonthAvg highAvg low Precip
January 63.8° 43.7° 3.76"
February 67.8° 47.6° 2.97"
March 74.0° 53.6° 3.47"
April 80.1° 59.8° 3.95"
May 86.9° 67.8° 5.01"
June 92.3° 73.7° 6.00"
July 94.5° 75.7° 3.77"
August 94.9° 75.4° 4.84"
September 90.4° 70.6° 4.71"
October 82.8° 60.9° 5.46"
November 72.6° 51.5° 3.87"
December 65.3° 45.6° 4.03"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 29% falling in the wettest three months (Aug, Sep, Oct).

January 3.76"
February 2.97"
March 3.47"
April 3.95"
May 5.01"
June 6.00"
July 3.77"
August 4.84"
September 4.71"
October 5.46"
November 3.87"
December 4.03"
Annual total 51.84"

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 3,288
Heating degree days How much heating the climate demands 1,266
Approximate annual cooling cost At 16.44¢/kWh, Texas average $541
Approximate annual electric heating cost Lower where heating is gas rather than electric $73

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 Harris County, where electricity is one line of eight.

Common questions

What is the weather like in Harris County?

Harris County averages a high of 94.9°F in August and a low of 43.7°F in January. Annual precipitation is 51.84 inches, with essentially no snow.

When is the rainy season in Harris County?

The wettest stretch is Aug, Sep, Oct, which accounts for 29% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Harris County?

The average daily high in August, the hottest month, is 94.9°F. That drives 3,288 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Harris County?

Effectively no. Measurable snowfall is rare in Harris County.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station HOUSTON INTERCONT AP, TX US (USW00012960), 8.7 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.