Conner, Montana · field elev 4,249 ft
Density Altitude at West Fork Lodge (4U7)
From a field elevation of 4,249 ft, a typical July afternoon at West Fork Lodge (82 °F) raises density altitude to about 6,681 ft — solidly into the range where performance charts deserve a close read.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 23.6 | 2,900 ft | 34.3 | 3,632 ft |
| February | 26.8 | 3,121 ft | 39.2 | 3,960 ft |
| March | 35.0 | 3,679 ft | 48.2 | 4,553 ft |
| April | 41.0 | 4,080 ft | 55.0 | 4,992 ft |
| May | 48.6 | 4,579 ft | 63.9 | 5,557 ft ▲ |
| June | 55.7 | 5,037 ft | 71.9 | 6,054 ft ▲ |
| July | 62.5 | 5,469 ft | 82.2 | 6,681 ft ▲ |
| August | 60.8 | 5,362 ft | 81.3 | 6,627 ft ▲ |
| September | 53.5 | 4,896 ft | 73.2 | 6,134 ft ▲ |
| October | 42.5 | 4,179 ft | 58.2 | 5,197 ft ▲ |
| November | 31.4 | 3,435 ft | 42.8 | 4,199 ft |
| December | 22.2 | 2,803 ft | 32.7 | 3,524 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 4U7
DENSITY ALTITUDE caution
Field elevation 4,249 ft — the air behaves like 6,669 ft.
- PRESSURE ALT
- 4,251 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 Montana fields
- KHRF — Ravalli County
Hamilton · elev 3,636 ft
- 7S4 — Wisdom
Wisdom · elev 6,133 ft
- 32S — Stevensville
Stevensville · elev 3,614 ft
- U05 — Riddick Field
Philipsburg · elev 5,219 ft
- 02T — Wise River
Wise River · elev 5,830 ft
- RC0 — Rock Creek
Clinton · elev 3,547 ft
- 3U3 — Bowman Field
Anaconda · elev 5,034 ft
- M26 — Drummond
Drummond · elev 4,245 ft
Frequently asked questions
How high does density altitude get at 4U7 in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at West Fork Lodge reaches roughly 6,681 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 4U7 on an average day?
It swings with the seasons: from roughly 2,803 ft at the coldest month's average temperature to about 5,469 ft at the warmest month's — all from a constant field elevation of 4,249 ft. The month-by-month table above carries the full year.
What is the field elevation of West Fork Lodge?
4,249 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 4U7 (FAA), in Conner, Montana.