Granite Shoals, Texas · field elev 860 ft
Density Altitude at Granite Shoals/ Bob Sylvester Airpark (2G5)
Granite Shoals/ Bob Sylvester Airpark sits at 860 ft, and even a typical August afternoon (97 °F) only lifts density altitude to about 3,445 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 | 47.9 | 344 ft | 62.2 | 1,288 ft |
| February | 52.3 | 638 ft | 66.0 | 1,533 ft |
| March | 59.2 | 1,093 ft | 72.8 | 1,967 ft |
| April | 66.7 | 1,578 ft | 80.0 | 2,419 ft |
| May | 74.8 | 2,093 ft | 86.1 | 2,796 ft |
| June | 81.6 | 2,519 ft | 92.8 | 3,204 ft |
| July | 84.5 | 2,698 ft | 96.3 | 3,415 ft |
| August | 84.6 | 2,704 ft | 96.8 | 3,445 ft |
| September | 78.1 | 2,301 ft | 90.5 | 3,065 ft |
| October | 68.2 | 1,675 ft | 81.6 | 2,519 ft |
| November | 57.4 | 975 ft | 71.2 | 1,866 ft |
| December | 49.5 | 451 ft | 63.6 | 1,379 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 2G5
DENSITY ALTITUDE
Field elevation 860 ft — the air behaves like 3,457 ft.
- PRESSURE ALT
- 861 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
- 2KL — Sunrise Beach
Sunrise Beach Village · elev 854 ft
- KDZB — Horseshoe Bay Resort
Horseshoe Bay · elev 1,093 ft
- KBMQ — Burnet Municipal/Kate Craddock Field
Burnet · elev 1,283 ft
- 88R — Spicewood
Spicewood · elev 830 ft
- KAQO — Llano Municipal
Llano · elev 1,102 ft
- KRYW — Lago Vista Tx/Rusty Allen
Lago Vista · elev 1,230 ft
- 3R9 — Lakeway Airpark
Lakeway · elev 909 ft
- KLZZ — Lampasas
Lampasas · elev 1,214 ft
Frequently asked questions
How high does density altitude get at 2G5 in summer?
On a typical August afternoon — around 97 °F at the nearest NOAA normals station — density altitude at Granite Shoals/ Bob Sylvester Airpark reaches roughly 3,445 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 2G5 on an average day?
It swings with the seasons: from roughly 344 ft at the coldest month's average temperature to about 2,704 ft at the warmest month's — all from a constant field elevation of 860 ft. The month-by-month table above carries the full year.
What is the field elevation of Granite Shoals/ Bob Sylvester Airpark?
860 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 2G5 (FAA), in Granite Shoals, Texas.