30-year climate normals

Walthall County Climate and Weather Averages

Hottest month — August

91.7°

average daily high. The coldest month is January, averaging a low of 37.0°F.

Walthall County gets 62.51" of precipitation a year, and 27% of it falls in Dec, Jan, Feb.

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	60.4°	37.0°	6.22"
February	64.1°	40.1°	5.42"
March	70.9°	47.2°	5.18"
April	76.9°	53.1°	5.73"
May	83.8°	61.7°	4.51"
June	90.1°	68.2°	4.90"
July	91.0°	70.9°	5.67"
August	91.7°	70.9°	6.30"
September	87.5°	66.4°	4.33"
October	79.7°	55.1°	4.75"
November	69.4°	45.1°	4.25"
December	62.3°	39.7°	5.25"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 27% falling in the wettest three months (Dec, Jan, Feb).

January 6.22"

February 5.42"

March 5.18"

April 5.73"

May 4.51"

June 4.90"

July 5.67"

August 6.30"

September 4.33"

October 4.75"

November 4.25"

December 5.25"

Annual total 62.51"

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 2,347

Heating degree days How much heating the climate demands 1,967

Approximate annual cooling cost At 16.16¢/kWh, Mississippi average $379

Approximate annual electric heating cost Lower where heating is gas rather than electric $111

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 Walthall County, where electricity is one line of eight.

Common questions

What is the weather like in Walthall County?

Walthall County averages a high of 91.7°F in August and a low of 37.0°F in January. Annual precipitation is 62.51 inches, with essentially no snow.

When is the rainy season in Walthall County?

The wettest stretch is Dec, Jan, Feb, which accounts for 27% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Walthall County?

The average daily high in August, the hottest month, is 91.7°F. That drives 2,347 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Walthall County?

Effectively no. Measurable snowfall is rare in Walthall County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station TYLERTOWN 5ESE, MS US (USC00229048), 6.4 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, Mississippi residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.