Congaree Weather: Forecasts, Climate, and the Best Time to Visit
Congaree is a humid subtropical park set in the floodplain of the river that shares its name, about 12 miles south of Columbia, South Carolina. In a nutshell, summers are hot and muggy, winters are mild and rainy, and rain is possible in every season. The most comfortable hiking window runs from October through April, when the heat eases and mosquitoes finally become less of a nuisance.
Current readings are unavailable. See the seasonal averages farther down this page.
Open-Meteo readings · updating… · park time zone
Congaree Climate Month by Month
Congaree lies in a humid subtropical climate zone. There is no truly dry season: precipitation is spread throughout the year, with a summer peak caused by convective thunderstorms. Temperatures almost never fall below 23°F in winter, while summer temperatures regularly approach 93°F. Humidity makes every degree feel heavier than it looks on paper.
| Month | Low (°F) | High (°F) | Rainfall (in.) |
|---|---|---|---|
| January | 34 | 54 | 3.7 |
| February | 37 | 57 | 3.5 |
| March | 45 | 66 | 4.3 |
| April | 54 | 75 | 3.5 |
| May | 63 | 82 | 3.9 |
| June | 70 | 91 | 4.7 |
| July | 73 | 93 | 5.9 |
| August | 72 | 93 | 5.1 |
| September | 66 | 86 | 3.9 |
| October | 54 | 75 | 2.8 |
| November | 43 | 64 | 3.0 |
| December | 36 | 55 | 3.3 |
Indicative climate normals for the Congaree area, in the Congaree River floodplain of South Carolina.
The Climate Season by Season
Winter (December to February)
Winters are mild by northern European standards. January days hover around 54 to 57°F, with cool nights between 34 and 37°F. Snow is rare, and overnight freezes happen only occasionally. With the leaves gone, the forest offers wide views of the canopy and makes it easier to spot wintering birds, especially great blue herons and birds of prey. The main risk is flooding: winter rain can quickly raise water levels in Cedar Creek and the Congaree River. Always check water levels before heading onto trails in low-lying areas.
Spring (March to May)
Spring is our favorite season for photography in Congaree. In March and April, the forest greens up, amphibians become active in the swamps, and daytime temperatures stay pleasant at 66 to 75°F. By May, the heat settles in and mosquitoes take center stage. Spring thunderstorms can trigger flash floods. Always check NPS alerts before planning a long outing on trails in the floodplain.
Summer (June to August)
Summer is the most demanding season in Congaree. Highs regularly top 91°F, relative humidity often exceeds 85% in the morning, and mosquitoes are everywhere from dawn through dusk. Convective thunderstorms roll in during the late afternoon, sometimes violently, bringing lightning, strong winds, and intense downpours. Our advice is simple: start at dawn, avoid the trails between 11 a.m. and 4 p.m., and head back before storm time. Bring at least 1.5 liters of water per person for a two-hour hike.
Fall (September to November)
September is still hot and stormy, much like summer. Starting in October, the heat drops noticeably to 72 to 75°F, mosquitoes thin out, and the bald cypress forest turns gold and russet. The display rarely gets much attention in guidebooks, but it is genuinely striking. November brings the best hiking temperatures, with visitor numbers still quite manageable. It is the ideal season for stringing together several trails without suffering in the heat.
Is Congaree Cold or Hot? Records and Extremes
Congaree is a lowland park set at only about 65 feet above sea level, so it does not experience severe alpine cold. Winter cold stays moderate, with occasional overnight freezes and snow only a few times each decade. Summer heat is much more noticeable: July and August nights can remain around 73°F without much overnight cooling, making mornings uncomfortable very quickly.
Congaree's main extreme is not temperature but flooding. After heavy rain upstream, the floodplain can end up under several feet of water, sometimes within a few hours. This is a normal, recurring process, but it can never be predicted completely in the short term.
What to Wear and Bring by Season
October through April: dress in layers. The morning may start at 41 to 46°F and climb to 68°F by afternoon on the same day. A lightweight waterproof windbreaker is useful in every season. Choose waterproof trail shoes when water levels are high.
May through September: keep clothing light and protection thorough. Wear a quick-drying T-shirt, lightweight pants to protect against mosquitoes and ticks, a wide-brimmed hat, and SPF 50+ sunscreen. DEET-based repellent at 30% minimum or picaridin is essential, not optional. Bring 1.5 to 2 liters of water per person for a two-hour hike.
Year-round: cover your ankles even on the Boardwalk. Ticks are present in this wet environment in every season, including winter on mild days.
Alerts and Conditions to Watch
The NPS specifically asks visitors to check the weather forecast before driving to Congaree. There are two park-specific concerns to keep in mind.
Flash floods: water levels in Cedar Creek and the Congaree River can rise with little or no warning. The NPS posts water levels on its official website. A rapid rise can close sections of the Boardwalk or cut off access to parts of the floodplain.
Summer thunderstorms: from June through September, convective thunderstorms develop quickly between 2 and 6 p.m. Leave open areas and riverbanks immediately at the first flash of lightning, even if the sky is still partly blue on the horizon.
Hurricane season (June through November): South Carolina is at risk of tropical storms and hurricanes. A passing hurricane can cause exceptional flooding throughout the Congaree watershed. If the National Weather Service (NWS) issues an active alert, postpone your visit without hesitation.
The Harry Hampton Visitor Center, open daily from 9 a.m. to 5 p.m., can tell you about current conditions when you arrive. The park is open 24/7 year-round, but temporary partial closures can happen without notice.
To plan your Congaree visit, the complete Congaree guide covers lodging, access, and activities. If you still cannot decide when to go, the hikes in Congaree are described trail by trail, including conditions.
Frequently Asked Questions
What's the weather like in Congaree right now?
Weather in Congaree varies widely by season, from relatively cool winter days around 54°F in January to oppressive heat and humidity in July and August, when temperatures reach 91 to 93°F. Updated data appears in real time at the top of this page.
What's the current temperature in Congaree?
Temperatures in Congaree depend on the season, ranging from 34°F at night in January to 93°F in the afternoon in July. For today's reading, check the forecast block at the top of the page.
Does it get cold in Congaree?
Congaree winters are mild by U.S. standards, with January highs around 54°F. Overnight freezes are possible but brief, and snow is an exceptional event. This is not a mountain park.
What should I wear to visit Congaree?
From October through April, wear layers and bring a lightweight rain jacket. From May through September, choose lightweight quick-drying clothing, a hat, and, above all, mosquito repellent with at least 30% DEET or picaridin. Closed-toe shoes are recommended in every season to help protect against ticks.
What is Congaree's climate like?
Congaree has a humid subtropical climate (Cfa), with hot, muggy summers and frequent thunderstorms, mild rainy winters, and no truly dry season. Flooding on the Congaree River and Cedar Creek is a regular event to watch for in every season.
When is the best time to visit Congaree?
The answer depends on your tolerance for heat, mosquitoes, and crowds. Our When to Visit Congaree guide gives you a detailed month-by-month answer, including the pros and cons of each season.