Alvin, Texas · field elev 43 ft
Density Altitude at Alvin Airpark (6R5)
Alvin Airpark sits at 43 ft, and even a typical August afternoon (91 °F) only lifts density altitude to about 2,107 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 | 53.4 | −300 ft | 63.3 | 353 ft |
| February | 57.2 | −47 ft | 66.7 | 574 ft |
| March | 63.3 | 353 ft | 72.5 | 946 ft |
| April | 68.7 | 703 ft | 77.6 | 1,269 ft |
| May | 76.1 | 1,175 ft | 84.7 | 1,713 ft |
| June | 80.7 | 1,464 ft | 89.0 | 1,979 ft |
| July | 82.5 | 1,576 ft | 90.9 | 2,095 ft |
| August | 82.5 | 1,576 ft | 91.1 | 2,107 ft |
| September | 79.5 | 1,389 ft | 88.5 | 1,948 ft |
| October | 71.0 | 850 ft | 81.4 | 1,508 ft |
| November | 62.0 | 268 ft | 72.5 | 946 ft |
| December | 55.0 | −193 ft | 64.7 | 444 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 6R5
DENSITY ALTITUDE
Field elevation 43 ft — the air behaves like 2,101 ft.
- PRESSURE ALT
- 44 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 Texas fields
- 3T2 — Wolfe Air Park
Manvel · elev 55 ft
- KLVJ — Pearland Regional
Houston · elev 44 ft
- T79 — Skyway Manor
Pearland · elev 55 ft
- 81D — Flyin Tiger
Angleton · elev 30 ft
- KAXH — Houston/Southwest
Houston · elev 69 ft
- KEFD — Ellington
Houston · elev 33 ft
- KHOU — William P Hobby
Houston · elev 46 ft
- 7R9 — Bailes
Angleton · elev 21 ft
Frequently asked questions
How high does density altitude get at 6R5 in summer?
On a typical August afternoon — around 91 °F at the nearest NOAA normals station — density altitude at Alvin Airpark reaches roughly 2,107 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 6R5 on an average day?
It swings with the seasons: from roughly −300 ft at the coldest month's average temperature to about 1,576 ft at the warmest month's — all from a constant field elevation of 43 ft. The month-by-month table above carries the full year.
What is the field elevation of Alvin Airpark?
43 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 6R5 (FAA), in Alvin, Texas.