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United States › Mississippi › Forrest County › Climate Station HATTIESBURG CHAIN MUNI AP, MS US Distance 6.5 mi Normals 1991–2020

30-year climate normals

Forrest County Climate and Weather Averages

Hottest month — August

91.8°

average daily high. The coldest month is January, averaging a low of 38.1°F.

Forrest County gets 58.91" of precipitation a year, and 28% 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.

40° 60° 80° JanFebMarAprMayJunJulAugSepOctNovDec
MonthAvg highAvg low Precip
January 60.0° 38.1° 5.82"
February 64.5° 41.7° 4.88"
March 71.5° 48.1° 5.57"
April 78.0° 53.9° 5.37"
May 84.6° 62.3° 4.44"
June 89.8° 69.5° 5.85"
July 91.6° 72.3° 5.70"
August 91.8° 71.8° 4.75"
September 88.0° 66.9° 4.15"
October 79.6° 55.0° 3.70"
November 69.2° 44.0° 3.70"
December 62.3° 40.5° 4.98"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 28% falling in the wettest three months (Jun, Jul, Aug).

January 5.82"
February 4.88"
March 5.57"
April 5.37"
May 4.44"
June 5.85"
July 5.70"
August 4.75"
September 4.15"
October 3.70"
November 3.70"
December 4.98"
Annual total 58.91"

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 2,479
Heating degree days How much heating the climate demands 1,920
Approximate annual cooling cost At 16.16¢/kWh, Mississippi average $401
Approximate annual electric heating cost Lower where heating is gas rather than electric $109

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 Forrest County, where electricity is one line of eight.

Common questions

What is the weather like in Forrest County?

Forrest County averages a high of 91.8°F in August and a low of 38.1°F in January. Annual precipitation is 58.91 inches, with essentially no snow.

When is the rainy season in Forrest County?

The wettest stretch is Jun, Jul, Aug, which accounts for 28% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Forrest County?

The average daily high in August, the hottest month, is 91.8°F. That drives 2,479 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Forrest County?

Effectively no. Measurable snowfall is rare in Forrest County.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station HATTIESBURG CHAIN MUNI AP, MS US (USW00013833), 6.5 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.