Located in central South Carolina, Congaree National Park has a humid subtropical climate, meaning hot summers, mild winters, and fairly consistent rainfall year-round. Seasonal flooding from the Congaree River also plays a major role in shaping the park’s environment.
Here’s a detailed month-by-month guide to help you plan your visit
You can click the image below to view the full-size weather chart for Congaree National Park.
January
- Average High: ~55°F (13°C)
- Average Low: ~34°F (1°C)
- Conditions: Cool and relatively quiet
January is one of the calmest months. Leafless trees improve visibility through the forest, making it great for hiking and wildlife spotting. Occasional cold snaps can bring frost.
February
- Average High: ~60°F (16°C)
- Average Low: ~37°F (3°C)
- Conditions: Late winter chill with early signs of spring
Temperatures begin to rise slightly. You may notice early plant growth and increased bird activity.
March
- Average High: ~68°F (20°C)
- Average Low: ~44°F (7°C)
- Conditions: Start of spring, variable weather
March brings blooming plants and more active wildlife. Rainfall increases, and trails may become muddy.
April
- Average High: ~76°F (24°C)
- Average Low: ~52°F (11°C)
- Conditions: Warm and vibrant
One of the best months to visit. The forest comes alive with greenery, and temperatures are comfortable for outdoor activities.
May
- Average High: ~83°F (28°C)
- Average Low: ~60°F (16°C)
- Conditions: Warm, humid, and buggy
Humidity rises, and mosquitoes become more noticeable. Despite this, it’s still a beautiful time with lush vegetation.
June
- Average High: ~89°F (32°C)
- Average Low: ~68°F (20°C)
- Conditions: Hot and humid, frequent storms
Summer heat kicks in. Afternoon thunderstorms are common, and flooding can occur in low-lying areas.
July
- Average High: ~92°F (33°C)
- Average Low: ~71°F (22°C)
- Conditions: Peak summer heat
Expect intense humidity and high temperatures. Early morning or evening visits are best. Mosquitoes are at their peak.
August
- Average High: ~91°F (33°C)
- Average Low: ~70°F (21°C)
- Conditions: Hot, humid, and stormy
Similar to July, with frequent rain showers. Flooding remains possible, especially after heavy rainfall.
September
- Average High: ~86°F (30°C)
- Average Low: ~66°F (19°C)
- Conditions: Gradual cooling
Humidity begins to ease slightly. It’s still warm, but more comfortable than peak summer.
October
- Average High: ~76°F (24°C)
- Average Low: ~54°F (12°C)
- Conditions: Pleasant and dry
Another ideal month to visit. Cooler temperatures and fewer bugs make hiking enjoyable.
November
- Average High: ~67°F (19°C)
- Average Low: ~45°F (7°C)
- Conditions: Cool and მშვიდ (calm)
Fall colors appear, and the forest becomes quieter. Great for peaceful exploration.
December
- Average High: ~58°F (14°C)
- Average Low: ~38°F (3°C)
- Conditions: Mild winter
Cool but rarely freezing. A good time for solitude and scenic walks without summer crowds.
Congaree National Park Weather by Month
| Month | Avg High (°F / °C) | Avg Low (°F / °C) | Rainfall (inches) | Sun (hrs/day) |
|---|---|---|---|---|
| January | 55°F / 13°C | 34°F / 1°C | 3.6 | 5.5 |
| February | 60°F / 16°C | 37°F / 3°C | 3.5 | 6.2 |
| March | 68°F / 20°C | 44°F / 7°C | 4.2 | 7.0 |
| April | 76°F / 24°C | 52°F / 11°C | 3.0 | 8.1 |
| May | 83°F / 28°C | 60°F / 16°C | 3.3 | 8.8 |
| June | 89°F / 32°C | 68°F / 20°C | 4.8 | 9.3 |
| July | 92°F / 33°C | 71°F / 22°C | 5.6 | 9.1 |
| August | 91°F / 33°C | 70°F / 21°C | 5.4 | 8.6 |
| September | 86°F / 30°C | 66°F / 19°C | 4.4 | 7.9 |
| October | 76°F / 24°C | 54°F / 12°C | 3.1 | 7.2 |
| November | 67°F / 19°C | 45°F / 7°C | 2.7 | 6.2 |
| December | 58°F / 14°C | 38°F / 3°C | 3.3 | 5.4 |
Best Time to Visit
- Ideal months: April and October
- Avoid if possible: July–August (extreme heat and mosquitoes)
- Unique experience: Late spring for lush greenery, winter for quiet landscapes
Tips for Visitors
- Bring insect repellent in warmer months
- Check for flood conditions, especially after heavy rain
- Wear waterproof shoes for muddy trails
- Plan early morning visits in summer to avoid heat
20 helpful FAQs about the weather at Congaree National Park:
1. What type of climate does Congaree National Park have?
It has a humid subtropical climate with hot summers, mild winters, and consistent rainfall.
2. What is the best time to visit for good weather?
April and October offer the most comfortable temperatures and fewer bugs.
3. Does it rain a lot in Congaree National Park?
Yes, rainfall is spread throughout the year, with peaks in summer.
4. What is the hottest month in the park?
July is typically the hottest, with highs around 92°F (33°C).
5. What is the coldest month?
January is usually the coldest, with lows near 34°F (1°C).
6. How is the weather in spring (March–May)?
Warm, increasingly humid, with blooming plants and occasional rain.
7. How hot does it get in summer?
Temperatures often exceed 90°F (32°C), with high humidity.
8. What is fall weather like?
Mild, drier, and very pleasant—ideal for hiking.
9. Is winter a good time to visit?
Yes, if you prefer cooler temperatures and fewer crowds.
10. Does the park experience extreme weather?
Severe thunderstorms and occasional flooding can occur, especially in summer.
11. Does Congaree National Park flood?
Yes, seasonal flooding is common due to the Congaree River.
12. When is flooding most likely?
Late winter through spring and after heavy summer rains.
13. Are trails affected by rain?
Yes, trails can become muddy or temporarily submerged.
14. How often do thunderstorms occur?
Frequently in summer, often in the afternoon.
15. Does it snow in the park?
Snow is rare and usually very light.
16. Can temperatures drop below freezing?
Yes, during winter nights, but it’s not common for long periods.
17. Is Congaree National Park humid?
Yes, especially from late spring through early fall.
18. How many sunny days does the park get?
It averages 5–9 hours of sunshine per day depending on the season.
19. Are mosquitoes worse in certain months?
Yes, they are most active from May through September.
20. What should I pack for changing weather?
Light, breathable clothing for summer; layers for winter; and always rain gear and insect repellent.