30-year climate normals

Petersburg city Climate and Weather Averages

Hottest month — July

89.3°

average daily high. The coldest month is January, averaging a low of 28.3°F.

Petersburg city gets 46.99" of precipitation a year, and 31% of it falls in Jul, Aug, Sep.

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	49.1°	28.3°	3.02"
February	52.2°	29.1°	2.70"
March	60.1°	36.1°	4.37"
April	70.4°	45.6°	3.62"
May	78.2°	55.0°	4.37"
June	85.5°	64.2°	4.23"
July	89.3°	69.0°	4.70"
August	87.4°	67.3°	5.31"
September	81.5°	60.8°	4.63"
October	71.6°	48.0°	3.41"
November	61.5°	37.3°	3.16"
December	52.6°	30.6°	3.47"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 31% falling in the wettest three months (Jul, Aug, Sep).

January 3.02"

February 2.70"

March 4.37"

April 3.62"

May 4.37"

June 4.23"

July 4.70"

August 5.31"

September 4.63"

October 3.41"

November 3.16"

December 3.47"

Annual total 46.99"

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 1,525

Heating degree days How much heating the climate demands 3,759

Approximate annual cooling cost At 17.61¢/kWh, Virginia average $269

Approximate annual electric heating cost Lower where heating is gas rather than electric $232

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 Petersburg city, where electricity is one line of eight.

Common questions

What is the weather like in Petersburg city?

Petersburg city averages a high of 89.3°F in July and a low of 28.3°F in January. Annual precipitation is 46.99 inches, with essentially no snow.

When is the rainy season in Petersburg city?

The wettest stretch is Jul, Aug, Sep, which accounts for 31% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Petersburg city?

The average daily high in July, the hottest month, is 89.3°F. That drives 1,525 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Petersburg city?

Effectively no. Measurable snowfall is rare in Petersburg city.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station PETERSBURG, VA US (USC00446656), 2.4 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, Virginia residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.