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United States › Alabama › Shelby County › Climate Station ALABASTER SHELBY CO AP, AL US Distance 9.3 mi Normals 1991–2020

30-year climate normals

Shelby County Climate and Weather Averages

Hottest month — July

91.1°

average daily high. The coldest month is January, averaging a low of 35.6°F.

Shelby County gets 56.19" of precipitation a year, and 29% of it falls in Jan, Feb, Mar.

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 55.7° 35.6° 5.35"
February 60.5° 39.3° 5.76"
March 67.9° 46.0° 5.40"
April 75.4° 52.6° 5.07"
May 82.5° 61.0° 4.15"
June 88.3° 68.7° 4.58"
July 91.1° 71.6° 4.93"
August 90.8° 71.0° 4.72"
September 86.1° 65.5° 3.57"
October 76.3° 53.9° 3.03"
November 66.0° 43.1° 4.56"
December 58.0° 38.3° 5.07"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 29% falling in the wettest three months (Jan, Feb, Mar).

January 5.35"
February 5.76"
March 5.40"
April 5.07"
May 4.15"
June 4.58"
July 4.93"
August 4.72"
September 3.57"
October 3.03"
November 4.56"
December 5.07"
Annual total 56.19"

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 2,181
Heating degree days How much heating the climate demands 2,378
Approximate annual cooling cost At 16.77¢/kWh, Alabama average $366
Approximate annual electric heating cost Lower where heating is gas rather than electric $140

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 Shelby County, where electricity is one line of eight.

Common questions

What is the weather like in Shelby County?

Shelby County averages a high of 91.1°F in July and a low of 35.6°F in January. Annual precipitation is 56.19 inches, with essentially no snow.

When is the rainy season in Shelby County?

The wettest stretch is Jan, Feb, Mar, which accounts for 29% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Shelby County?

The average daily high in July, the hottest month, is 91.1°F. That drives 2,181 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Shelby County?

Effectively no. Measurable snowfall is rare in Shelby County.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station ALABASTER SHELBY CO AP, AL US (USW00053864), 9.3 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, Alabama residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.