What is the hottest month at Congaree?

July, with an average high of 93°F and an average low of 73°F at Columbia Owens Dwtn AP (NOAA 1991–2020 normals). The station averages 83 days a year at or above 90°F.

How cold does Congaree get in winter?

January is the coldest month, averaging a low of 37°F and a high of 57°F at Columbia Owens Dwtn AP. About 33 nights a year drop to freezing or below.

Does it snow at Congaree?

Columbia Owens Dwtn AP records almost no snowfall (no snow normals). Higher elevations in the park can differ.

When is the rainy season at Congaree?

July is the wettest month on average (4.8 inches of precipitation at Columbia Owens Dwtn AP); the station's annual total is 43.7 inches.

How many hours of daylight does Congaree get?

About 14h 23m on June 15 and 9h 55m on December 15 (sunrise 6:12 AM, sunset 8:35 PM in June; 7:20 AM to 5:16 PM in December, America/New York time).

What is the best month to visit Congaree for weather?

By NOAA's normals, average highs sit between 55°F and 85°F in January, February, March, April, May, October, November and December. Of those, January, February and December are also well below the park's peak crowds. Weather in the park varies with elevation; this is the Columbia Owens Dwtn AP station.

Weather by month

Congaree weather, month by month

Last verified October 6, 2026NOAA 1991–2020 normalsAmerica/New York time

Average highs, lows, rain, snow and daylight for every month. Measured at the Columbia Owens Dwtn AP (212 ft, 13.9 mi from Harry Hampton Visitor Center).

View of the Congaree River during the Fall — Photo: NPS

Jul high: 93°F; hottest month
Jan low: 37°F; coldest month
Rain + snowmelt: 43.7in / yr; wettest: Jul
Snowfall: —in / yr; rare
Days ≥ 90°F: 83/ yr
Nights ≤ 32°F: 33/ yr

Columbia Owens Dwtn AP

Month by month

Normals are 30-year averages (1991–2020). Crowds = each month’s share of the park’s busiest month, from NPS visitor counts. Sunrise and sunset are for the 15th of each month in 2027.

Average high and low, every monthbars run from the low to the high · tan strip = precipitation

Month	High	Low	Rain	Wet days	Sunrise	Sunset	Daylight	Crowds
Jan	57°	37°	3.4″	9	7:28 AM	5:37 PM	10h 09m	48
Feb	61°	40°	3.3″	9	7:08 AM	6:07 PM	10h 59m	55
Mar	69°	46°	3.5″	9	7:34 AM	7:30 PM	11h 57m	98
Apr	77°	53°	2.7″	8	6:52 AM	7:54 PM	13h 01m	85
May	84°	62°	3.0″	10	6:22 AM	8:17 PM	13h 55m	100
Jun	90°	70°	4.8″	12	6:12 AM	8:35 PM	14h 23m	71
Jul	93°	73°	4.8″	12	6:23 AM	8:35 PM	14h 11m	59
Aug	91°	72°	4.7″	10	6:45 AM	8:10 PM	13h 25m	47
Sep	86°	67°	4.3″	9	7:06 AM	7:30 PM	12h 24m	58
Oct	77°	56°	3.1″	7	7:28 AM	6:50 PM	11h 22m	73
Nov	67°	44°	2.8″	7	6:55 AM	5:20 PM	10h 25m	72
Dec	60°	39°	3.5″	9	7:20 AM	5:16 PM	9h 55m	59

Sweet spot: January, February and December combine average highs between 55°F and 85°F with crowds under 60% of the peak month. Check what is open in those months — quiet can also mean closed roads.

How to read this

These are NOAA’s official 1991–2020 climate normals for one weather station, not a model of the whole park. The station is the one with complete temperature and precipitation normals nearest to a visitor center. Highs and lows are daily averages for the month; “wet days” are days with at least 0.01 inch of precipitation. Mountain parks can be 10–20 °F cooler at their high points than at the station, and the NPS weather page for Congaree is the place for current conditions and seasonal closures.

Sunrise and sunset are computed with the NOAA solar equations for the park’s coordinates and shown in America/New York time for the 15th of each month of 2027; they are accurate to about a minute.

Sources · 3

1.U.S. Climate Normals 1991–2020 — monthly normals station inventory · National Centers for Environmental Information (NOAA)
2.Congaree National Park — Weather (nps.gov) · National Park Service
3.Congaree National Park — Visitor Use Statistics · National Park Service (IRMA)

FAQ

Congaree weather questions

What is the hottest month at Congaree?: July, with an average high of 93°F and an average low of 73°F at Columbia Owens Dwtn AP (NOAA 1991–2020 normals). The station averages 83 days a year at or above 90°F.
How cold does Congaree get in winter?: January is the coldest month, averaging a low of 37°F and a high of 57°F at Columbia Owens Dwtn AP. About 33 nights a year drop to freezing or below.
Does it snow at Congaree?: Columbia Owens Dwtn AP records almost no snowfall (no snow normals). Higher elevations in the park can differ.
When is the rainy season at Congaree?: July is the wettest month on average (4.8 inches of precipitation at Columbia Owens Dwtn AP); the station's annual total is 43.7 inches.
How many hours of daylight does Congaree get?: About 14h 23m on June 15 and 9h 55m on December 15 (sunrise 6:12 AM, sunset 8:35 PM in June; 7:20 AM to 5:16 PM in December, America/New York time).
What is the best month to visit Congaree for weather?: By NOAA's normals, average highs sit between 55°F and 85°F in January, February, March, April, May, October, November and December. Of those, January, February and December are also well below the park's peak crowds. Weather in the park varies with elevation; this is the Columbia Owens Dwtn AP station.

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