Errol, New Hampshire · field elev 1,248 ft
Density Altitude at Errol (KERR)
Errol sits at 1,248 ft, and even a typical July afternoon (77 °F) only lifts density altitude to about 2,700 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 | 12.3 | −1,666 ft | 23.4 | −865 ft |
| February | 12.7 | −1,637 ft | 26.0 | −681 ft |
| March | 23.4 | −865 ft | 35.5 | −18 ft |
| April | 37.3 | 106 ft | 48.7 | 878 ft |
| May | 50.7 | 1,012 ft | 62.8 | 1,804 ft |
| June | 60.0 | 1,623 ft | 71.8 | 2,379 ft |
| July | 64.5 | 1,914 ft | 76.9 | 2,700 ft |
| August | 62.8 | 1,804 ft | 75.3 | 2,600 ft |
| September | 55.6 | 1,336 ft | 68.3 | 2,157 ft |
| October | 43.5 | 529 ft | 54.9 | 1,289 ft |
| November | 32.1 | −253 ft | 41.1 | 366 ft |
| December | 19.8 | −1,123 ft | 29.3 | −449 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 KERR
DENSITY ALTITUDE
Field elevation 1,248 ft — the air behaves like 2,706 ft.
- PRESSURE ALT
- 1,249 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
- KBML — Berlin Regional
Berlin · elev 1,161 ft
- 4C4 — Gifford Field
Colebrook · elev 1,017 ft
- 2G8 — Gorham
Gorham · elev 835 ft
- KHIE — Mount Washington Regional
Whitefield · elev 1,072 ft
- 8B2 — Twin Mountain
Twin Mountain · elev 1,459 ft
- 1B5 — Franconia
Franconia · elev 975 ft
- 5B9 — Dean Meml
Haverhill · elev 582 ft
- 4MB — Moultonborough
Moultonborough · elev 576 ft
Frequently asked questions
How high does density altitude get at KERR in summer?
On a typical July afternoon — around 77 °F at the nearest NOAA normals station — density altitude at Errol reaches roughly 2,700 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 KERR on an average day?
It swings with the seasons: from roughly −1,666 ft at the coldest month's average temperature to about 1,914 ft at the warmest month's — all from a constant field elevation of 1,248 ft. The month-by-month table above carries the full year.
What is the field elevation of Errol?
1,248 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KERR (ICAO) / ERR (FAA), in Errol, New Hampshire.