30-year climate normals

Hamilton County Climate and Weather Averages

Hottest month — August

96.1°

average daily high. The coldest month is January, averaging a low of 33.6°F.

Hamilton County gets 31.59" of precipitation a year, and 35% of it falls in Apr, May, Jun.

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°	33.6°	2.03"
February	62.4°	37.4°	2.15"
March	69.1°	44.2°	2.13"
April	77.0°	52.6°	3.08"
May	83.7°	61.4°	4.05"
June	91.2°	69.2°	3.91"
July	94.7°	71.2°	2.69"
August	96.1°	71.6°	1.53"
September	89.3°	65.1°	2.41"
October	80.1°	54.8°	3.27"
November	68.6°	43.7°	2.30"
December	60.6°	35.8°	2.04"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 35% falling in the wettest three months (Apr, May, Jun).

January 2.03"

February 2.15"

March 2.13"

April 3.08"

May 4.05"

June 3.91"

July 2.69"

August 1.53"

September 2.41"

October 3.27"

November 2.30"

December 2.04"

Annual total 31.59"

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 2,499

Heating degree days How much heating the climate demands 2,285

Approximate annual cooling cost At 16.44¢/kWh, Texas average $411

Approximate annual electric heating cost Lower where heating is gas rather than electric $131

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 Hamilton County, where electricity is one line of eight.

Common questions

What is the weather like in Hamilton County?

Hamilton County averages a high of 96.1°F in August and a low of 33.6°F in January. Annual precipitation is 31.59 inches, with essentially no snow.

When is the rainy season in Hamilton County?

The wettest stretch is Apr, May, Jun, which accounts for 35% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Hamilton County?

The average daily high in August, the hottest month, is 96.1°F. That drives 2,499 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Hamilton County?

Effectively no. Measurable snowfall is rare in Hamilton County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station EVANT 1SSW, TX US (USC00413005), 17.2 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.