St Joseph, Louisiana · field elev 74 ft
Density Altitude at Tensas Parish (L33)
Tensas Parish sits at 74 ft, and even a typical August afternoon (93 °F) only lifts density altitude to about 2,279 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 | 47.0 | −692 ft | 58.6 | 83 ft |
| February | 50.9 | −429 ft | 62.7 | 352 ft |
| March | 58.0 | 44 ft | 70.3 | 843 ft |
| April | 65.1 | 508 ft | 77.5 | 1,301 ft |
| May | 73.4 | 1,041 ft | 85.0 | 1,770 ft |
| June | 79.6 | 1,433 ft | 90.5 | 2,108 ft |
| July | 81.9 | 1,577 ft | 93.0 | 2,261 ft |
| August | 81.5 | 1,552 ft | 93.3 | 2,279 ft |
| September | 76.8 | 1,257 ft | 89.5 | 2,047 ft |
| October | 66.6 | 605 ft | 80.5 | 1,489 ft |
| November | 56.3 | −69 ft | 69.7 | 805 ft |
| December | 49.4 | −530 ft | 61.0 | 241 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 L33
DENSITY ALTITUDE
Field elevation 74 ft — the air behaves like 2,261 ft.
- PRESSURE ALT
- 75 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 Louisiana fields
- KTVR — Vicksburg Tallulah Regional
Tallulah · elev 86 ft
- F89 — Winnsboro Municipal
Winnsboro · elev 78 ft
- M80 — Scott
Tallulah · elev 86 ft
- 0R4 — Concordia Parish
Vidalia · elev 55 ft
- 0M9 — Delhi Municipal
Delhi · elev 91 ft
- L32 — Jonesville
Jonesville · elev 56 ft
- M79 — John H Hooks Jr Meml
Rayville · elev 83 ft
- F86 — Caldwell Parish
Columbia · elev 67 ft
Frequently asked questions
How high does density altitude get at L33 in summer?
On a typical August afternoon — around 93 °F at the nearest NOAA normals station — density altitude at Tensas Parish reaches roughly 2,279 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 L33 on an average day?
It swings with the seasons: from roughly −692 ft at the coldest month's average temperature to about 1,577 ft at the warmest month's — all from a constant field elevation of 74 ft. The month-by-month table above carries the full year.
What is the field elevation of Tensas Parish?
74 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is L33 (FAA), in St Joseph, Louisiana.