Ridgeland, South Carolina · field elev 85 ft
Density Altitude at Ridgeland-Claude Dean (3J1)
Ridgeland-Claude Dean sits at 85 ft, and even a typical July afternoon (92 °F) only lifts density altitude to about 2,201 ft — heat still trims performance, but the field rarely turns high-and-hot.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 50.2 | −462 ft | 60.3 | 209 ft |
| February | 53.3 | −255 ft | 63.7 | 431 ft |
| March | 59.3 | 143 ft | 69.9 | 831 ft |
| April | 66.5 | 612 ft | 77.0 | 1,283 ft |
| May | 74.2 | 1,106 ft | 84.0 | 1,721 ft |
| June | 80.1 | 1,478 ft | 88.9 | 2,024 ft |
| July | 83.2 | 1,671 ft | 91.8 | 2,201 ft |
| August | 82.2 | 1,609 ft | 90.3 | 2,109 ft |
| September | 77.6 | 1,321 ft | 85.7 | 1,826 ft |
| October | 68.6 | 748 ft | 78.1 | 1,352 ft |
| November | 58.8 | 110 ft | 69.3 | 793 ft |
| December | 52.8 | −288 ft | 62.7 | 366 ft |
▲ above 5,000 ft · ⚠ above 8,000 ft. These are planning references at standard pressure and dry air — afternoon humidity and low pressure both push the real number higher. Run today's values below.
Run today’s numbers for 3J1
DENSITY ALTITUDE
Field elevation 85 ft — the air behaves like 2,213 ft.
- PRESSURE ALT
- 86 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
- —
- AIR DENSITY
- —
- WATER · GRAINS/LB
- —
For training and reference · verify with official sources and your POH before flight · no tool on this site renders a go / no-go judgment
Nearby South Carolina fields
- KARW — Beaufort Exec
Beaufort · elev 9 ft
- KHXD — Hilton Head
Hilton Head Island · elev 19 ft
- 3J0 — Hampton County
Hampton · elev 112 ft
- KRBW — Lowcountry Regional
Walterboro · elev 101 ft
- 7S1 — 7 Oaks Flight Park
Fairfax · elev 138 ft
- KAQX — Allendale County
Allendale · elev 162 ft
- 6J2 — St George
St George · elev 85 ft
- 99N — Bamberg County
Bamberg · elev 231 ft
Frequently asked questions
How high does density altitude get at 3J1 in summer?
On a typical July afternoon — around 92 °F at the nearest NOAA normals station — density altitude at Ridgeland-Claude Dean reaches roughly 2,201 ft at standard pressure. Hotter-than-normal days, low pressure, and humidity all push it higher, so run the day's actual numbers before flying.
What is the density altitude at 3J1 on an average day?
It swings with the seasons: from roughly −462 ft at the coldest month's average temperature to about 1,671 ft at the warmest month's — all from a constant field elevation of 85 ft. The month-by-month table above carries the full year.
What is the field elevation of Ridgeland-Claude Dean?
85 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 3J1 (FAA), in Ridgeland, South Carolina.