Clemson, United States experiences average highs of 22°C (72°F) and lows of 13°C (55°F) throughout the year. Rainfall is moderate, averaging about 10 rainy days per month. Sunshine is abundant, averaging about 9 hours per day. Average highs have cooled by 1.5°C (2.7°F) across the available records.
Clemson, United States Weather & Climate 2026
Monthly climate averages for Clemson, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Feb–Aug At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
6.6/10
Best: April, May, September, October
UV Index
6
High
Temperature 22°C / 13°C
Feels Like 23°C / 12°C
Rainy Days 10
Rainfall 106 mm
Sunshine 9 h
Humidity 71%
Wind Speed 13 km/h
Dew Point 12°C
Snow Days 1 days
Frost Days 5 days
Hottest Month
32°C
July
Avg Low23°C
Rain13days
Coldest Month
2°C
January
Avg High11°C
Rain10days
Driest Month
7days
September
Avg High29°C
Avg Low19°C
Windiest Month
15 km/h
April (Gusts 37)
Worst Time to Visit
Consider avoiding January, February, July, December due to frequent rain.
Sun Position
Sunrise 06:19
Daylight 14.5h
Sunset 20:47
Live conditions—
Clemson on the map · live conditions
Clemson, United States
- Continent
- Americas
- Country
- United States
- City
- Clemson
- Population
- 15.4K
- Elevation
- 221 m
- Coordinates
- 34.68°, -82.84°
Seasonal Breakdown
Spring
Mar–May
Avg High 22°C
Avg Low 11°C
Rain 10 days/mo
2/3 best months
Summer
Jun–Aug
Avg High 31°C
Avg Low 22°C
Rain 12 days/mo
Autumn
Sep–Nov
Avg High 23°C
Avg Low 14°C
Rain 7 days/mo
2/3 best months
Winter
Dec–Feb
Avg High 13°C
Avg Low 4°C
Rain 10 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 11°C / 2°C . Feb: 15°C / 5°C . Mar: 18°C / 8°C . Apr: 22°C / 11°C . May: 26°C / 16°C . Jun: 30°C / 20°C . Jul: 32°C / 23°C . Aug: 31°C / 22°C . Sep: 29°C / 19°C . Oct: 23°C / 14°C . Nov: 17°C / 8°C . Dec: 13°C / 4°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 130 mm. Feb: 126 mm. Mar: 109 mm. Apr: 116 mm. May: 121 mm. Jun: 83 mm. Jul: 76 mm. Aug: 106 mm. Sep: 105 mm. Oct: 92 mm. Nov: 79 mm. Dec: 124 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 71%. Feb: 74%. Mar: 68%. Apr: 68%. May: 72%. Jun: 71%. Jul: 72%. Aug: 74%. Sep: 70%. Oct: 70%. Nov: 70%. Dec: 76%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 14 km/h . Feb: 15 km/h . Mar: 15 km/h . Apr: 15 km/h . May: 14 km/h . Jun: 12 km/h . Jul: 11 km/h . Aug: 10 km/h . Sep: 12 km/h . Oct: 12 km/h . Nov: 12 km/h . Dec: 13 km/h .
Sunshine
Sunshine
Sunshine: Jan: 7h. Feb: 7h. Mar: 8h. Apr: 10h. May: 10h. Jun: 11h. Jul: 12h. Aug: 11h. Sep: 10h. Oct: 9h. Nov: 8h. Dec: 6h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 4. Mar: UV 6. Apr: UV 7. May: UV 7. Jun: UV 8. Jul: UV 8. Aug: UV 7. Sep: UV 6. Oct: UV 5. Nov: UV 4. Dec: UV 3.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 2 days. Feb: 1 days. Mar: 0 days. Apr: 0 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 0 days. Dec: 1 days.
Climate Trends
Average highs have cooled by 1.5°C (2.7°F) across the available records. Average rainfall is trending wetter by about 25 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 33°C | Jul · 32°C |
| Coldest month | Jan 2025 · -1°C | Jan · 2°C |
| Wettest month | May 2025 · 224 mm | Jan · 130 mm |
| Windiest month | Mar 2025 · 16 km/h | Apr · 15 km/h |
Month-by-Month Weather Table
January
Poor 
February
Fair March
Good April best
Excellent May best
Excellent June
Good July
Fair August
Fair September best
Excellent October best
Excellent November
Good December
Fair | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 11°C / 2°C | 9°C / -1°C | 10days (130 mm) Wet | 6.7h Fair | 71% Muggy | 3.3 Moderate | Poor | View Details |
| February | 15°C / 5°C | 13°C / 3°C | 11days (126 mm) Wet | 6.7h Fair | 74% Muggy | 4.2 Moderate | Fair | View Details |
| March | 18°C / 8°C | 17°C / 5°C | 10days (109 mm) Wet | 8.1h Good | 68% Muggy | 5.7 High | Good | View Details |
| April best | 22°C / 11°C | 22°C / 10°C | 8days (116 mm) Wet | 9.8h Good | 68% Muggy | 6.7 High | Excellent | View Details |
| May best | 26°C / 16°C | 28°C / 16°C | 11days (121 mm) Wet | 10.3h Excellent | 72% Muggy | 6.9 High | Excellent | View Details |
| June | 30°C / 20°C | 33°C / 22°C | 12days (83 mm) Wet | 11.4h Excellent | 71% Muggy | 7.9 Very High | Good | View Details |
| July | 32°C / 23°C | 36°C / 26°C | 13days (76 mm) Wet | 11.9h Excellent | 72% Muggy | 8.1 Very High | Fair | View Details |
| August | 31°C / 22°C | 35°C / 25°C | 12days (106 mm) Wet | 10.6h Excellent | 74% Muggy | 7.3 Very High | Fair | View Details |
| September best | 29°C / 19°C | 31°C / 21°C | 7days (105 mm) Good | 9.7h Good | 70% Muggy | 6.4 High | Excellent | View Details |
| October best | 23°C / 14°C | 23°C / 13°C | 7days (92 mm) Good | 8.5h Good | 70% Muggy | 5.2 High | Excellent | View Details |
| November | 17°C / 8°C | 16°C / 6°C | 7days (79 mm) Good | 7.5h Good | 70% Muggy | 3.7 Moderate | Good | View Details |
| December | 13°C / 4°C | 11°C / 2°C | 10days (124 mm) Wet | 6h Fair | 76% Humid | 3 Moderate | Fair | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Clemson are April, May, September, October, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Clemson, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Clemson is July, with average daytime highs of 32°C (90°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Clemson is January, with average overnight lows of 2°C (36°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Clemson is January, averaging 130mm of precipitation across 10 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Clemson runs through July, June, August, February, with the heaviest rainfall in July. Based on 10-year averages for Clemson.
Clemson receives approximately 107 sunshine hours per year. The sunniest month is July with around 12 hours. Based on climate data for Clemson.
The least favorable months to visit Clemson are January, February, July, December, primarily due to frequent rain. For the best conditions, consider April, May, September, October instead.
The annual average UV index in Clemson is 6, classified as high. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Clemson is 71%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Clemson receives snow. Months with snowfall average 1 snow days and 2 cm (1 in) of accumulation, with about 5 frost days during winter.
Average wind speeds in Clemson are 13 km/h (8 mph). The windiest month is April with peak winds reaching 15 km/h (9 mph) (gusts up to 37 km/h / 23 mph).
Clemson averages 6 clear-sky days per month with overall cloud cover around 54%. The clearest skies occur in October.
The annual average dew point in Clemson is 12°C (54°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Clemson has a Humid Subtropical climate, classified as Cfa under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Clemson ranges from 12°C (54°F) to 23°C (73°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Clemson. It earns a climate score of 7.2/10 with Good.
For June in Clemson, pack Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 30°C (86°F) and 12 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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