New Haven, Connecticut · field elev 13 ft
Density Altitude at Tweed/New Haven (KHVN)
Tweed/New Haven sits at 13 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 1,515 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 | 30.5 | −1,909 ft | 38.1 | −1,377 ft |
| February | 32.0 | −1,803 ft | 40.2 | −1,232 ft |
| March | 38.5 | −1,350 ft | 47.0 | −767 ft |
| April | 48.5 | −666 ft | 57.8 | −45 ft |
| May | 58.5 | 1 ft | 67.7 | 601 ft |
| June | 67.9 | 614 ft | 76.4 | 1,157 ft |
| July | 73.9 | 998 ft | 82.1 | 1,515 ft |
| August | 72.9 | 935 ft | 81.0 | 1,446 ft |
| September | 66.0 | 491 ft | 74.7 | 1,049 ft |
| October | 54.7 | −250 ft | 63.8 | 349 ft |
| November | 44.7 | −924 ft | 53.4 | −337 ft |
| December | 36.3 | −1,502 ft | 43.7 | −992 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 KHVN
DENSITY ALTITUDE
Field elevation 13 ft — the air behaves like 1,509 ft.
- PRESSURE ALT
- 14 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
- KBDR — Bridgeport/Sikorsky
Bridgeport · elev 9 ft
- KMMK — Meriden Markham Municipal
Meriden · elev 103 ft
- KOXC — Waterbury-Oxford
Oxford · elev 730 ft
- KSNC — Chester
Chester · elev 416 ft
- 42B — Goodspeed
East Haddam · elev 9 ft
- N41 — Mount Tobe
Waterbury · elev 850 ft
- 4B8 — Robertson Field
Plainville · elev 202 ft
- KDXR — Danbury Municipal
Danbury · elev 457 ft
Frequently asked questions
How high does density altitude get at KHVN in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Tweed/New Haven reaches roughly 1,515 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 KHVN on an average day?
It swings with the seasons: from roughly −1,909 ft at the coldest month's average temperature to about 998 ft at the warmest month's — all from a constant field elevation of 13 ft. The month-by-month table above carries the full year.
What is the field elevation of Tweed/New Haven?
13 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KHVN (ICAO) / HVN (FAA), in New Haven, Connecticut.