30-year climate normals

Orange County Climate and Weather Averages

Hottest month — August

93.1°

average daily high. The coldest month is January, averaging a low of 43.8°F.

Orange County gets 62.13" of precipitation a year, and 33% of it falls in Jun, Jul, Aug.

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	63.5°	43.8°	5.32"
February	67.3°	47.8°	3.09"
March	73.2°	53.4°	3.63"
April	79.0°	59.6°	3.92"
May	85.7°	67.3°	4.70"
June	90.9°	73.1°	6.70"
July	92.6°	74.6°	6.85"
August	93.1°	74.4°	6.89"
September	89.5°	70.6°	6.69"
October	82.1°	61.1°	5.47"
November	72.3°	51.5°	3.89"
December	65.5°	45.8°	4.98"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 33% falling in the wettest three months (Jun, Jul, Aug).

January 5.32"

February 3.09"

March 3.63"

April 3.92"

May 4.70"

June 6.70"

July 6.85"

August 6.89"

September 6.69"

October 5.47"

November 3.89"

December 4.98"

Annual total 62.13"

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 3,075

Heating degree days How much heating the climate demands 1,262

Approximate annual cooling cost At 16.44¢/kWh, Texas average $506

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 Orange County, where electricity is one line of eight.

Common questions

What is the weather like in Orange County?

Orange County averages a high of 93.1°F in August and a low of 43.8°F in January. Annual precipitation is 62.13 inches, with essentially no snow.

When is the rainy season in Orange County?

The wettest stretch is Jun, Jul, Aug, which accounts for 33% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Orange County?

The average daily high in August, the hottest month, is 93.1°F. That drives 3,075 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Orange County?

Effectively no. Measurable snowfall is rare in Orange County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station PORT ARTHUR SE TX AP, TX US (USW00012917), 14.1 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.