Ketchum, Oklahoma · field elev 783 ft
Density Altitude at South Grand Lake Regional (1K8)
South Grand Lake Regional sits at 783 ft, and even a typical July afternoon (91 °F) only lifts density altitude to about 3,002 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 | 37.2 | −480 ft | 48.1 | 262 ft |
| February | 41.5 | −185 ft | 53.0 | 589 ft |
| March | 49.9 | 383 ft | 61.9 | 1,174 ft |
| April | 58.9 | 978 ft | 70.5 | 1,727 ft |
| May | 67.8 | 1,554 ft | 77.9 | 2,194 ft |
| June | 76.5 | 2,106 ft | 86.0 | 2,696 ft |
| July | 81.1 | 2,393 ft | 91.0 | 3,002 ft |
| August | 80.2 | 2,337 ft | 90.7 | 2,983 ft |
| September | 72.5 | 1,854 ft | 83.3 | 2,530 ft |
| October | 61.6 | 1,154 ft | 72.9 | 1,879 ft |
| November | 49.7 | 369 ft | 60.8 | 1,102 ft |
| December | 40.5 | −253 ft | 50.8 | 443 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 1K8
DENSITY ALTITUDE
Field elevation 783 ft — the air behaves like 3,002 ft.
- PRESSURE ALT
- 784 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 Oklahoma fields
- OK1 — Stearmans Roost
Vinita · elev 702 ft
- 3O9 — Grand Lake Regional
Afton · elev 792 ft
- H04 — Vinita Municipal
Vinita · elev 695 ft
- KGMJ — Grove Regional
Grove · elev 831 ft
- KMIO — Miami Regional
Miami · elev 806 ft
- H71 — Mid-America Industrial
Pryor · elev 622 ft
- KGCM — Claremore Regional
Claremore · elev 733 ft
- O18 — Buzzards Roost
Inola · elev 661 ft
Frequently asked questions
How high does density altitude get at 1K8 in summer?
On a typical July afternoon — around 91 °F at the nearest NOAA normals station — density altitude at South Grand Lake Regional reaches roughly 3,002 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 1K8 on an average day?
It swings with the seasons: from roughly −480 ft at the coldest month's average temperature to about 2,393 ft at the warmest month's — all from a constant field elevation of 783 ft. The month-by-month table above carries the full year.
What is the field elevation of South Grand Lake Regional?
783 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 1K8 (FAA), in Ketchum, Oklahoma.