Ellington, Connecticut · field elev 253 ft
Density Altitude at Ellington (7B9)
Ellington sits at 253 ft, and even a typical July afternoon (85 °F) only lifts density altitude to about 2,001 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 | 27.1 | −1,849 ft | 35.3 | −1,272 ft |
| February | 29.6 | −1,672 ft | 38.5 | −1,050 ft |
| March | 37.8 | −1,099 ft | 47.3 | −449 ft |
| April | 49.5 | −301 ft | 60.5 | 429 ft |
| May | 60.0 | 396 ft | 71.7 | 1,153 ft |
| June | 68.9 | 974 ft | 79.9 | 1,671 ft |
| July | 74.3 | 1,318 ft | 85.2 | 2,001 ft |
| August | 72.5 | 1,204 ft | 83.3 | 1,883 ft |
| September | 64.8 | 709 ft | 75.7 | 1,407 ft |
| October | 53.0 | −67 ft | 63.5 | 625 ft |
| November | 42.3 | −789 ft | 51.5 | −167 ft |
| December | 32.6 | −1,461 ft | 40.6 | −906 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 7B9
DENSITY ALTITUDE
Field elevation 253 ft — the air behaves like 1,988 ft.
- PRESSURE ALT
- 254 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 Connecticut fields
- 7B6 — Skylark Airpark
Warehouse Point · elev 120 ft
- KBDL — Bradley International
Windsor Locks · elev 173 ft
- KHFD — Hartford-Brainard
Hartford · elev 18 ft
- 4B9 — Simsbury
Simsbury · elev 195 ft
- KIJD — Windham
Willimantic · elev 246 ft
- C44 — Toutant
Putnam · elev 770 ft
- 9B8 — Salmon River Airfield
Marlborough · elev 540 ft
- 4B8 — Robertson Field
Plainville · elev 202 ft
Frequently asked questions
How high does density altitude get at 7B9 in summer?
On a typical July afternoon — around 85 °F at the nearest NOAA normals station — density altitude at Ellington reaches roughly 2,001 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 7B9 on an average day?
It swings with the seasons: from roughly −1,849 ft at the coldest month's average temperature to about 1,318 ft at the warmest month's — all from a constant field elevation of 253 ft. The month-by-month table above carries the full year.
What is the field elevation of Ellington?
253 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 7B9 (FAA), in Ellington, Connecticut.