Clarksville, Texas · field elev 440 ft
Density Altitude at Clarksville/Red River Cty-J D Trissell Field (KLBR)
Clarksville/Red River Cty-J D Trissell Field sits at 440 ft, and even a typical August afternoon (93 °F) only lifts density altitude to about 2,712 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 | 42.8 | −522 ft | 53.6 | 205 ft |
| February | 46.5 | −271 ft | 57.7 | 476 ft |
| March | 54.0 | 231 ft | 65.2 | 965 ft |
| April | 61.3 | 712 ft | 72.9 | 1,459 ft |
| May | 70.4 | 1,299 ft | 80.2 | 1,918 ft |
| June | 78.7 | 1,824 ft | 89.2 | 2,474 ft |
| July | 82.1 | 2,037 ft | 92.0 | 2,645 ft |
| August | 82.1 | 2,037 ft | 93.1 | 2,712 ft |
| September | 75.4 | 1,617 ft | 86.4 | 2,303 ft |
| October | 64.1 | 894 ft | 75.5 | 1,623 ft |
| November | 53.2 | 178 ft | 64.8 | 939 ft |
| December | 45.1 | −366 ft | 56.0 | 364 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 KLBR
DENSITY ALTITUDE
Field elevation 440 ft — the air behaves like 2,706 ft.
- PRESSURE ALT
- 441 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
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Mount Pleasant · elev 364 ft
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Sulphur Springs · elev 489 ft
- F51 — Winnsboro Municipal
Winnsboro · elev 513 ft
- 2F7 — Commerce Municipal
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- KATA — Hall-Miller Municipal
Atlanta · elev 280 ft
Frequently asked questions
How high does density altitude get at KLBR in summer?
On a typical August afternoon — around 93 °F at the nearest NOAA normals station — density altitude at Clarksville/Red River Cty-J D Trissell Field reaches roughly 2,712 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 KLBR on an average day?
It swings with the seasons: from roughly −522 ft at the coldest month's average temperature to about 2,037 ft at the warmest month's — all from a constant field elevation of 440 ft. The month-by-month table above carries the full year.
What is the field elevation of Clarksville/Red River Cty-J D Trissell Field?
440 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KLBR (ICAO) / LBR (FAA), in Clarksville, Texas.