Griffith, Indiana · field elev 634 ft
Density Altitude at Griffith-Merrillville (05C)
Griffith-Merrillville sits at 634 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 2,385 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 | 23.2 | −1,649 ft | 31.1 | −1,090 ft |
| February | 26.8 | −1,393 ft | 35.2 | −804 ft |
| March | 37.2 | −665 ft | 46.4 | −37 ft |
| April | 48.8 | 124 ft | 59.3 | 820 ft |
| May | 60.0 | 866 ft | 70.6 | 1,550 ft |
| June | 69.5 | 1,480 ft | 80.2 | 2,155 ft |
| July | 73.9 | 1,760 ft | 83.9 | 2,385 ft |
| August | 72.0 | 1,639 ft | 82.0 | 2,267 ft |
| September | 65.2 | 1,204 ft | 75.8 | 1,880 ft |
| October | 52.8 | 392 ft | 63.1 | 1,068 ft |
| November | 39.8 | −486 ft | 48.2 | 84 ft |
| December | 28.9 | −1,245 ft | 36.3 | −728 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 05C
DENSITY ALTITUDE
Field elevation 634 ft — the air behaves like 2,391 ft.
- PRESSURE ALT
- 635 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 Indiana fields
- KGYY — Gary/Chicago International
Gary/Chicago · elev 597 ft
- 3HO — Hobart Sky Ranch
Hobart · elev 630 ft
- C97 — Lowell
Lowell · elev 672 ft
- KVPZ — Porter County Regional
Valparaiso · elev 770 ft
- C98 — Lake Village
Lake Village · elev 644 ft
- KMGC — Michigan City Municipal-Phillips Field
Michigan City · elev 655 ft
- KPPO — La Porte Municipal
La Porte · elev 812 ft
- KOXI — Starke County
Knox · elev 685 ft
Frequently asked questions
How high does density altitude get at 05C in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Griffith-Merrillville reaches roughly 2,385 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 05C on an average day?
It swings with the seasons: from roughly −1,649 ft at the coldest month's average temperature to about 1,760 ft at the warmest month's — all from a constant field elevation of 634 ft. The month-by-month table above carries the full year.
What is the field elevation of Griffith-Merrillville?
634 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 05C (FAA), in Griffith, Indiana.