30-year climate normals

Harris County Climate and Weather Averages

Hottest month — July

92.9°

average daily high. The coldest month is January, averaging a low of 38.2°F.

Harris County gets 48.82" of precipitation a year, and 28% of it falls in Jan, Feb, Mar.

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	58.7°	38.2°	4.24"
February	63.2°	41.5°	4.46"
March	70.4°	47.3°	4.92"
April	77.7°	54.0°	4.03"
May	85.1°	63.1°	3.24"
June	90.2°	70.5°	4.03"
July	92.9°	73.5°	4.35"
August	91.8°	73.0°	4.68"
September	87.3°	67.9°	3.34"
October	78.3°	56.8°	2.78"
November	68.4°	46.1°	3.96"
December	60.6°	40.6°	4.79"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 28% falling in the wettest three months (Jan, Feb, Mar).

January 4.24"

February 4.46"

March 4.92"

April 4.03"

May 3.24"

June 4.03"

July 4.35"

August 4.68"

September 3.34"

October 2.78"

November 3.96"

December 4.79"

Annual total 48.82"

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 2,534

Heating degree days How much heating the climate demands 1,942

Approximate annual cooling cost At 15.84¢/kWh, Georgia average $401

Approximate annual electric heating cost Lower where heating is gas rather than electric $108

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 92.9°F in July and a low of 38.2°F in January. Annual precipitation is 48.82 inches, with essentially no snow.

When is the rainy season in Harris County?

The wettest stretch is Jan, Feb, Mar, which accounts for 28% 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 July, the hottest month, is 92.9°F. That drives 2,534 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 COLUMBUS METRO AP, GA US (USW00093842), 15 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, Georgia residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.