New Rockford, North Dakota · field elev 1,535 ft
Density Altitude at Tomlinson Field (8J7)
Tomlinson Field sits at 1,535 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 3,348 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 | 8.4 | −1,591 ft | 18.3 | −870 ft |
| February | 12.6 | −1,283 ft | 23.1 | −527 ft |
| March | 25.6 | −350 ft | 35.8 | 361 ft |
| April | 41.0 | 716 ft | 53.2 | 1,532 ft |
| May | 54.6 | 1,624 ft | 67.2 | 2,439 ft |
| June | 64.8 | 2,286 ft | 76.4 | 3,020 ft |
| July | 69.5 | 2,586 ft | 81.7 | 3,348 ft |
| August | 67.5 | 2,459 ft | 80.7 | 3,287 ft |
| September | 58.5 | 1,879 ft | 71.8 | 2,731 ft |
| October | 43.6 | 892 ft | 55.2 | 1,663 ft |
| November | 27.5 | −216 ft | 37.1 | 450 ft |
| December | 13.9 | −1,188 ft | 22.8 | −548 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 8J7
DENSITY ALTITUDE
Field elevation 1,535 ft — the air behaves like 3,367 ft.
- PRESSURE ALT
- 1,536 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 North Dakota fields
- 46D — Carrington Municipal
Carrington · elev 1,607 ft
- D24 — Fessenden-Streibel Municipal
Fessenden · elev 1,619 ft
- 6D3 — Maddock Municipal
Maddock · elev 1,600 ft
- KDVL — Devils Lake Regional
Devils Lake · elev 1,469 ft
- 5H4 — Harvey Municipal
Harvey · elev 1,607 ft
- D31 — Leeds Municipal
Leeds · elev 1,508 ft
- 5L0 — Lakota Municipal
Lakota · elev 1,511 ft
- 8M6 — Mc Ville Municipal
Mc Ville · elev 1,473 ft
Frequently asked questions
How high does density altitude get at 8J7 in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Tomlinson Field reaches roughly 3,348 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 8J7 on an average day?
It swings with the seasons: from roughly −1,591 ft at the coldest month's average temperature to about 2,586 ft at the warmest month's — all from a constant field elevation of 1,535 ft. The month-by-month table above carries the full year.
What is the field elevation of Tomlinson Field?
1,535 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 8J7 (FAA), in New Rockford, North Dakota.