What is the hottest month in Clemson?

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

What is the coldest month in Clemson?

January is the coldest month in Clemson, with an average low of 32.5°F.

What month does Clemson get the most rain?

August is typically the wettest month in Clemson, with about 5.27 inches of precipitation.

What plant hardiness zone is Clemson in?

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

Has the climate in Clemson changed recently?

9.3% of Clemson'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.

Clemson, SC

Climate overview — based on NOAA 1991-2020 normals from CLEMSON UNIV, SC US.

Cfa Humid subtropical climate 8b USDA hardiness Zone 8b

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Clemson has an annual average temperature of 61.5°F with about 52.4 inches of precipitation per year and 2.2 inches of snow. The warmest month is July (average high 91.0°F), and the coldest is January (average low 32.5°F). August is typically the wettest month (5.27 in) and October the driest (3.76 in). Snow typically falls from December through March.

Pleasant months

1 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

36.9°F

warmest to coldest month

Heating need

2,811

HDD/yr

Cooling need

1,551

CDD/yr

Best time to visit Clemson

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Climate change signal

All-time records →

34 of 366 (9.3%) of Clemson'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		21
1900s		27
1910s		3
1920s		50
1930s		63
1940s		42
1950s		40
1960s		9
1970s		19
1980s		18
1990s		10
2000s		20
2010s		32
2020s		12

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	53.4°F	32.5°F	42.9°F	4.94 in	0.8 in	11
February	57.1°F	34.6°F	45.8°F	4.36 in	0.8 in	11
March	64.6°F	40.6°F	52.6°F	4.80 in	0.3 in	11
April	73.3°F	48.2°F	60.8°F	4.20 in	—	10
May	80.6°F	57.2°F	68.9°F	4.06 in	—	10
June	87.6°F	65.1°F	76.4°F	4.16 in	—	11
July	91.0°F	68.5°F	79.8°F	4.09 in	—	10
August	89.5°F	67.7°F	78.6°F	5.27 in	—	11
September	84.2°F	61.9°F	73.0°F	3.80 in	—	8
October	74.3°F	50.0°F	62.2°F	3.76 in	—	8
November	64.3°F	39.5°F	51.9°F	3.87 in	—	9
December	55.9°F	34.4°F	45.1°F	5.07 in	0.3 in	11