Dwight, Illinois · field elev 632 ft
Density Altitude at Dwight (KDTG)
Dwight sits at 632 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 2,358 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 | 22.3 | −1,716 ft | 30.7 | −1,120 ft |
| February | 26.2 | −1,438 ft | 35.0 | −820 ft |
| March | 37.1 | −675 ft | 47.5 | 35 ft |
| April | 48.8 | 122 ft | 60.8 | 916 ft |
| May | 60.7 | 909 ft | 72.1 | 1,643 ft |
| June | 70.1 | 1,516 ft | 81.1 | 2,209 ft |
| July | 72.8 | 1,688 ft | 83.5 | 2,358 ft |
| August | 70.7 | 1,554 ft | 81.9 | 2,259 ft |
| September | 64.2 | 1,137 ft | 77.1 | 1,959 ft |
| October | 52.1 | 343 ft | 64.1 | 1,130 ft |
| November | 39.0 | −544 ft | 48.5 | 102 ft |
| December | 27.8 | −1,325 ft | 36.1 | −744 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 KDTG
DENSITY ALTITUDE
Field elevation 632 ft — the air behaves like 2,389 ft.
- PRESSURE ALT
- 633 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 Illinois fields
- KPNT — Pontiac Municipal
Pontiac · elev 666 ft
- C09 — Morris Municipal/James R Washburn Field
Morris · elev 585 ft
- 8N2 — Skydive Chicago
Ottawa · elev 616 ft
- 3KK — Kankakee
Kankakee · elev 625 ft
- 0C8 — Cushing Field Ltd
Newark · elev 640 ft
- KJOT — Joliet Regional
Joliet · elev 582 ft
- KIKK — Greater Kankakee
Kankakee · elev 630 ft
- KLOT — Lewis University
Chicago/Romeoville · elev 679 ft
Frequently asked questions
How high does density altitude get at KDTG in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Dwight reaches roughly 2,358 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 KDTG on an average day?
It swings with the seasons: from roughly −1,716 ft at the coldest month's average temperature to about 1,688 ft at the warmest month's — all from a constant field elevation of 632 ft. The month-by-month table above carries the full year.
What is the field elevation of Dwight?
632 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KDTG (ICAO) / DTG (FAA), in Dwight, Illinois.