What is the hottest month in Petersburg?

July is the warmest month in Petersburg, with an average high of 91.0°F.

What is the coldest month in Petersburg?

January is the coldest month in Petersburg, with an average low of 27.5°F.

What month does Petersburg get the most rain?

December is typically the wettest month in Petersburg, with about 5.73 inches of precipitation.

What plant hardiness zone is Petersburg in?

Petersburg is approximately in USDA plant hardiness Zone 8a, based on the average annual extreme minimum temperature.

Has the climate in Petersburg changed recently?

8.7% of Petersburg's all-time daily heat records were set in the last decade (since 2015), compared to roughly 5% if records were evenly distributed over time.

Petersburg, TN

Climate overview — based on NOAA 1991-2020 normals from LEWISBURG EXP STN, TN US.

Cfa Humid subtropical climate 8a USDA hardiness Zone 8a

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Petersburg has an annual average temperature of 59°F with about 56.1 inches of precipitation per year and 0.9 inches of snow. The warmest month is July (average high 91.0°F), and the coldest is January (average low 27.5°F). December is typically the wettest month (5.73 in) and October the driest (3.67 in). Snow typically falls from January through February.

Annual swing

40.5°F

warmest to coldest month

Heating need

3,504

HDD/yr

Cooling need

1,356

CDD/yr

Best time to visit Petersburg

Full guide →

Climate change signal

All-time records →

32 of 366 (8.7%) of Petersburg's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.

1890s		1
1900s		46
1910s		50
1920s		44
1930s		63
1940s		22
1950s		21
1960s		9
1970s		5
1980s		17
1990s		11
2000s		28
2010s		43
2020s		6

Bars: number of all-time daily heat records still standing that were set in each decade.

Monthly averages

Month	Avg High	Avg Low	Avg Temp	Precipitation	Snow	Rainy days
January	49.1°F	27.5°F	38.3°F	4.47 in	0.3 in	9
February	54.0°F	29.9°F	41.9°F	4.73 in	0.4 in	9
March	62.6°F	36.2°F	49.4°F	5.56 in	0.1 in	11
April	72.4°F	44.2°F	58.3°F	5.06 in	—	10
May	80.6°F	54.2°F	67.4°F	4.71 in	—	11
June	88.0°F	62.8°F	75.4°F	4.87 in	—	11
July	91.0°F	66.6°F	78.8°F	4.44 in	—	11
August	90.8°F	64.1°F	77.5°F	4.29 in	—	9
September	85.4°F	56.8°F	71.1°F	4.52 in	—	7
October	74.5°F	45.2°F	59.9°F	3.67 in	—	8
November	62.3°F	35.8°F	49.1°F	4.02 in	—	9
December	52.3°F	30.4°F	41.3°F	5.73 in	0.1 in	10