Climate and monthly weather forecast
Clemson, SC

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The climate of Clemson

Designated within the climatological realm of the Humid Subtropical climate, according to the Köppen climate classification, Clemson, South Carolina occupies a geographical position that is subject to no dry season. Over the course of the year, the climate in Clemson witnesses a wide spectrum of weather conditions.

Monthly average temperatures fluctuate from 33.4°F (0.8°C) to 89.6°F (32°C), revealing Clemson's variation from cool winters to hot summers. A feature of the Clemson climate reveals average high temperatures rising steadily from 49.6°F (9.8°C) in January to a peak of 89.6°F (32°C) in July. This trend showcases the progressing heat intensity towards the middle of the year. Clemson's humidity level also showcases a subtle annual variation with the highest relative humidity seen in January and December at 77% and lowest in July with 70%.

Precipitation in Clemson is distributed evenly throughout the year with the highest volumes recorded in December with 4.21" (107mm), and the lowest seen in September with 1.73" (44mm). It is important to note that a total number of rainfall days does not necessarily correspond with the volume of rainfall. For example, July has 17.8 rainy days, the highest for the year, but the volume of rain in this month of 2.6" (66mm) does not surpass that of December.

Sunshine hours range from 5.4 hours per day in December to 11.1 hours in July. The wind speed varies moderately throughout the year, from a mild 4.1mph (6.6km/h) in August to 6.3mph (10.1km/h) in February, adding another layer of dynamism to Clemson's weather profile.

The best time to visit Clemson

Considering the climatic conditions, the period from late April to October stands as an advantageous time frame to visit Clemson. During this span, daytime temperatures range from 70.7°F (21.5°C) to 89.6°F (32°C), creating ample opportunity for outdoor activities. With the peak of sunshine hours reaching 14.2 hours per day in July and a UV index of 6 from May to August, it encourages sun seekers and beach enthusiasts. Despite an increased chance of rainfall from 2.76" (70mm) to 3.74" (95mm), the humidity level drops to an average of 72% from the 75% seen in the early part of the year, making for a more comfortable experience.

The worst time to visit Clemson

Venturing to Clemson during the months of January and February might not be advisable for weather-sensitive visitors. During this span, temperatures can dip as low as 33.4°F (0.8°C) and 37°F (2.8°C), respectively. Compounding the cooler temperatures, these months also see the least daylight hours at 10.1 hours and 11 hours correspondingly, reducing sightseeing opportunities. Furthermore, the relative humidity of 73% and 75%, combined with the reduced visibility of 6 miles, might diminish the overall enjoyment of outdoor activities during this time frame.

Spring weather in Clemson

Spring in Clemson lasts from March to May with temperatures ranging from 42.4°F (5.8°C) to 78.8°F (26°C). The period offers moderate weather conditions with rainfall averaging 3.47" (88mm) and humidity around 75%. With daylight hours extending from 12 hours to 14 hours, the season encourages outdoor springs blooms, making Clemson in spring a charming spectacle to behold.

Summer weather in Clemson

Clemson’s summer span from June to August is characterized by temperature ranges from 64.9°F (18.3°C) to 89.6°F (32°C). This season attracts maximum sunlight with up to 14.5 hours per day in brightness. Increased heat is well-managed with a slight decrease in humidity to a comfortable 70% to 72%. Visitors during this time can expect the warmest conditions Clemson has to offer.

Autumn weather in Clemson

The autumnal months of September through November in Clemson bring a decline in temperature from 62.1°F (16.7°C) to 41.9°F (5.5°C). Rainfall generally decreases to an average of 2.65" (67mm). Average daylight hours over this period correspondingly reduce from 12.4 hours to 10.4 hours. Therefore, Autumn poses as a transition period from the intense heat of summer to the milder conditions of winter.

Winter weather in Clemson

Winter in Clemson, prevalent from December to February, unfolds with the lowest temperature dropping down to 33.4°F (0.8°C). Despite the cooler conditions, snowfall is minimal with just 2.05" (52mm) registered in December and a modest 0.87" (22mm) in January. The highest rainfall is seen in December with 4.21" (107mm), making it the wettest month of the year. Consequently, winter's cooler conditions and increased rainfall make it a quiet time for tourism.

Weather in January

Begin the year in Clemson, South Carolina with January's distinctly cool climate. Compared to February's slightly warmer weather, daily maximum temperatures swing around 49.6°F (9.8°C) whilst night temperature drops as low as 33.4°F (0.8°C). Weather in January »

Weather in February

February signals in subtle climate progression, temperatures showing a slight increase from January's wintery chill. A blend of cool and moist conditions with the relative humidity at 75%, typically characterizes this month. Dominant characteristics are greater daylight hours, higher relative humidity as well as the appearance of fresh greenery in landscapes and gardens. Weather in February »

Weather in March

As spring unveils its magic in March, temperatures showcase an upward trend from February's lows, with the highest recorded at 61.2°F (16.2°C). Daylight hours begin to extend, offering sunnier slots for outdoor activities and exploration. Weather in March »

Weather in April

April marks the full swing of spring in Clemson city. Warm weather really begins to hold steady compared to the mercurial temperatures of March, with peaks of 70.7°F (21.5°C) being common. This month offers typically pleasant weather, perfect for spring festivals and other outdoor activities. Weather in April »

Weather in May

As spring transitions into summer in May, temperatures rise, peaking at 78.8°F (26°C). However, the heat remains manageable compared to the extreme heat prevalent between June and August. The warm weather finds expression in the blooming of summer flowers and the vibrant greenery that surrounds the city. Weather in May »

Weather in June

June is typically the gateway into summer in Clemson, South Carolina. The temperature reaches notable highs of 86.5°F (30.3°C), making it a warmer month than May. One can anticipate long sunny days and an extended period of daylight. Weather in June »

Weather in July

July comes packed with the thick of summer, extending the high temperatures from June, with temperatures reaching 89.6°F (32°C). The summer heat, however, does not preclude the city of Clemson from being lively and vibrant. Annual celebrations, concerts, and fireworks during Independence Day typify the festive mood in the city. Weather in July »

Weather in August

Weather patterns in August remain similar to July with a slight dip in temperature in Clemson. The vibrant summer lifestyle persists, characterized by outdoor parties, festivals, and verdant landscapes. Sightseers can revel in the city's sunny disposition and warm weather, thus allowing for a picturesque spectacle of Clemson. Weather in August »

Weather in September

September marks the onset of fall in Clemson, South Carolina, offering a respite from the heights of summer with its highs of 82.8°F (28.2°C). Landscapes begin to convert into colorful canvases filled with hues of orange, red, and yellow. Weather in September »

Weather in October

October's weather can be classified as quintessential fall in Clemson, showcasing a dramatic decrease in temperatures, plummeting from September's to around 71.6°F (22°C). This time is characterized by fewer daylight hours and the sky assuming an aesthetic charm with radiant sunsets. Weather in October »

Weather in November

November ushers in the winter season in Clemson with conspicuous changes from October's weather patterns. The splendid fall-colored foliage starts shedding, temperatures falling notably to 59.9°F (15.5°C). Shortened daylight hours signify the upcoming winter solstice. Weather in November »

Weather in December

December marks winter at full throttle in Clemson, the temperature dropping substantially from November's average to around 52.7°F (11.5°C). Winter in Clemson translates into cooler days, fewer sunshine hours, and the inclusion of warmer clothing in one's wardrobe. Weather in December »
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Frequently asked questions

What is the coldest time of year in Clemson?

With average high and low temperatures of 49.6°F (9.8°C) and 33.4°F (0.8°C) respectively, January is Clemson's coldest month.

How much does it rain in Clemson?

Throughout the year, there are 164.1 rainfall days, and 37.09" (942mm) of precipitation is accumulated.

When does it snow in Clemson?

Months with snowfall in Clemson are January through March, November and December.

How many days does it snow in Clemson?

In Clemson, South Carolina, during the entire year, snow falls for 3.6 days and aggregates up to 4.25" (108mm) of snow.

What is the month with the lowest UV index in Clemson?

The months with the lowest UV index are January and December, with an average maximum UV index of 2.

When is Daylight Saving Time (DST) in Clemson?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Clemson, South Carolina, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

When it does not snow in Clemson?

April through October are months without snowfall.

What is the month with the highest UV index in Clemson?

May through August, with an average maximum UV index of 6, are months with the highest UV index in Clemson.

When are the longest days in Clemson?

The month with the longest days is June, with an average of 14h and 24min of daylight.

What is the warmest month in Clemson?

July stands out as Clemson's warmest month, with an average high-temperature of 89.6°F (32°C) and a low-temperature of 68°F (20°C).

What is the least humid month in Clemson?

The least humid month in Clemson, South Carolina, is July, with an average relative humidity of 70%.

What month has the most sunshine in Clemson?

With an average of 11.1h of sunshine, July has the most sunshine of the year in Clemson, South Carolina.

What is the driest month in Clemson?

The month with the least rainfall is September, when the rain falls for 12.5 days and typically collects 1.73" (44mm) of precipitation.

What is the most humid month in Clemson?

The most humid month in Clemson is December, with an average relative humidity of 77%.

What is the wettest month in Clemson?

December is the month with the most rainfall in Clemson. Rain falls for 11.8 days and accumulates 4.21" (107mm) of precipitation.

When does it snow the most in Clemson?

December is the month with the most snowfall. Snow falls for 0.7 days and accumulates 2.05" (52mm) of snow.

What is the month with the shortest days in Clemson?

The month with the shortest days is December, with an average of 9h and 54min of daylight.

What is the month with the least sunshine in Clemson?

December has the least sunshine of the year, with an average of 5.4h of sunshine.

Average pressure
Clemson, SC

Average pressure - Clemson, SC

The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).

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Average wind speed
Clemson, SC

Average wind speed - Clemson, SC

The windiest month (with the highest average wind speed) is February (6.3mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).

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Average rainfall
Clemson, SC

Average rainfall - Clemson, SC

The wettest month (with the highest rainfall) is December (4.21").
The driest month (with the least rainfall) is September (1.73").

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Average rainfall days
Clemson, SC

Average rainfall days - Clemson, SC

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is October (9.5 days).

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Average snowfall
Clemson, SC

Average snowfall - Clemson, SC

The month with the highest snowfall is December (2.05").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days
Clemson, SC

Average snowfall days - Clemson, SC

The month with the highest number of snowfall days is January (1.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight / Average sunshine
Clemson, SC

Average daylight / Average sunshine - Clemson, SC

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

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Average sunshine days
Clemson, SC

Average sunshine days - Clemson, SC

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (10.5 days).

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Average UV index
Clemson, SC

Average UV index - Clemson, SC

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).

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Average visibility
Clemson, SC

Average visibility - Clemson, SC

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Clemson, South Carolina, USA

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