Franconia, New Hampshire · field elev 975 ft
Density Altitude at Franconia (1B5)
Franconia sits at 975 ft, and even a typical July afternoon (80 °F) only lifts density altitude to about 2,572 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 | 15.6 | −1,769 ft | 27.8 | −896 ft |
| February | 17.3 | −1,646 ft | 30.4 | −713 ft |
| March | 27.1 | −945 ft | 39.7 | −69 ft |
| April | 40.4 | −21 ft | 53.4 | 853 ft |
| May | 53.2 | 840 ft | 67.4 | 1,765 ft |
| June | 61.8 | 1,404 ft | 75.7 | 2,291 ft |
| July | 66.4 | 1,700 ft | 80.2 | 2,572 ft |
| August | 64.5 | 1,578 ft | 78.8 | 2,485 ft |
| September | 56.8 | 1,077 ft | 71.7 | 2,038 ft |
| October | 45.3 | 312 ft | 58.2 | 1,169 ft |
| November | 34.1 | −455 ft | 44.7 | 271 ft |
| December | 22.3 | −1,286 ft | 33.1 | −524 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 1B5
DENSITY ALTITUDE
Field elevation 975 ft — the air behaves like 2,560 ft.
- PRESSURE ALT
- 976 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 New Hampshire fields
- 8B2 — Twin Mountain
Twin Mountain · elev 1,459 ft
- 5B9 — Dean Meml
Haverhill · elev 582 ft
- KHIE — Mount Washington Regional
Whitefield · elev 1,072 ft
- 1P1 — Plymouth Municipal
Plymouth · elev 506 ft
- 2G8 — Gorham
Gorham · elev 835 ft
- 4MB — Moultonborough
Moultonborough · elev 576 ft
- KBML — Berlin Regional
Berlin · elev 1,161 ft
- 2N2 — Newfound Valley
Bristol · elev 510 ft
Frequently asked questions
How high does density altitude get at 1B5 in summer?
On a typical July afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Franconia reaches roughly 2,572 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 1B5 on an average day?
It swings with the seasons: from roughly −1,769 ft at the coldest month's average temperature to about 1,700 ft at the warmest month's — all from a constant field elevation of 975 ft. The month-by-month table above carries the full year.
What is the field elevation of Franconia?
975 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 1B5 (FAA), in Franconia, New Hampshire.