30-year climate normals

St. Landry Parish Climate and Weather Averages

Hottest month — August

92.0°

average daily high. The coldest month is January, averaging a low of 41.4°F.

St. Landry Parish gets 61.63" of precipitation a year, and 29% 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	63.5°	41.4°	6.54"
February	67.2°	44.7°	4.51"
March	73.5°	50.7°	3.75"
April	79.4°	56.8°	5.34"
May	85.5°	64.5°	5.72"
June	90.2°	70.4°	6.97"
July	91.6°	72.6°	4.41"
August	92.0°	72.3°	4.36"
September	88.3°	67.7°	5.14"
October	81.2°	57.8°	5.04"
November	71.4°	48.3°	4.97"
December	65.1°	43.3°	4.88"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 29% falling in the wettest three months (Apr, May, Jun).

January 6.54"

February 4.51"

March 3.75"

April 5.34"

May 5.72"

June 6.97"

July 4.41"

August 4.36"

September 5.14"

October 5.04"

November 4.97"

December 4.88"

Annual total 61.63"

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 2,698

Heating degree days How much heating the climate demands 1,467

Approximate annual cooling cost At 14.15¢/kWh, Louisiana average $382

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 St. Landry Parish, where electricity is one line of eight.

Common questions

What is the weather like in St. Landry Parish?

St. Landry Parish averages a high of 92.0°F in August and a low of 41.4°F in January. Annual precipitation is 61.63 inches, with essentially no snow.

When is the rainy season in St. Landry Parish?

The wettest stretch is Apr, May, Jun, which accounts for 29% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in St. Landry Parish?

The average daily high in August, the hottest month, is 92.0°F. That drives 2,698 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in St. Landry Parish?

Effectively no. Measurable snowfall is rare in St. Landry Parish.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station GRAND COTEAU, LA US (USC00163800), 11.9 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, Louisiana residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.