Danielson, Connecticut · field elev 238 ft
Density Altitude at Danielson (KLZD)
Danielson sits at 238 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 1,777 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 | 24.9 | −2,025 ft | 34.7 | −1,333 ft |
| February | 27.1 | −1,868 ft | 37.7 | −1,124 ft |
| March | 34.9 | −1,319 ft | 45.5 | −590 ft |
| April | 46.2 | −542 ft | 58.1 | 253 ft |
| May | 56.8 | 167 ft | 68.6 | 936 ft |
| June | 65.3 | 723 ft | 76.2 | 1,420 ft |
| July | 71.1 | 1,096 ft | 81.9 | 1,777 ft |
| August | 69.2 | 974 ft | 80.0 | 1,659 ft |
| September | 62.0 | 509 ft | 73.4 | 1,243 ft |
| October | 49.9 | −293 ft | 61.4 | 469 ft |
| November | 40.2 | −952 ft | 50.3 | −266 ft |
| December | 31.0 | −1,592 ft | 40.4 | −938 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 KLZD
DENSITY ALTITUDE
Field elevation 238 ft — the air behaves like 1,784 ft.
- PRESSURE ALT
- 239 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
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- 7B9 — Ellington
Ellington · elev 253 ft
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- KGON — Groton-New London
Groton (New London) · elev 9 ft
- 7B6 — Skylark Airpark
Warehouse Point · elev 120 ft
- 42B — Goodspeed
East Haddam · elev 9 ft
- KHFD — Hartford-Brainard
Hartford · elev 18 ft
Frequently asked questions
How high does density altitude get at KLZD in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Danielson reaches roughly 1,777 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 KLZD on an average day?
It swings with the seasons: from roughly −2,025 ft at the coldest month's average temperature to about 1,096 ft at the warmest month's — all from a constant field elevation of 238 ft. The month-by-month table above carries the full year.
What is the field elevation of Danielson?
238 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KLZD (ICAO) / LZD (FAA), in Danielson, Connecticut.