Dutton, Montana · field elev 3,699 ft
Density Altitude at Dutton (5U1)
From a field elevation of 3,699 ft, a typical July afternoon at Dutton (82 °F) raises density altitude to about 6,019 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 | 23.7 | 2,221 ft | 34.6 | 2,969 ft |
| February | 25.0 | 2,312 ft | 35.7 | 3,044 ft |
| March | 31.9 | 2,786 ft | 43.1 | 3,539 ft |
| April | 41.3 | 3,419 ft | 53.5 | 4,220 ft |
| May | 50.8 | 4,045 ft | 63.7 | 4,871 ft |
| June | 58.1 | 4,515 ft | 70.3 | 5,284 ft ▲ |
| July | 66.0 | 5,016 ft | 82.3 | 6,019 ft ▲ |
| August | 65.0 | 4,953 ft | 81.1 | 5,947 ft ▲ |
| September | 56.4 | 4,406 ft | 70.7 | 5,309 ft ▲ |
| October | 44.0 | 3,598 ft | 56.5 | 4,413 ft |
| November | 32.4 | 2,820 ft | 43.7 | 3,579 ft |
| December | 24.4 | 2,270 ft | 35.6 | 3,037 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 5U1
DENSITY ALTITUDE caution
Field elevation 3,699 ft — the air behaves like 6,001 ft.
- PRESSURE ALT
- 3,701 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
- 5U5 — Fairfield
Fairfield · elev 3,991 ft
- KCII — Choteau
Choteau · elev 3,947 ft
- S01 — Conrad
Conrad · elev 3,548 ft
- KGTF — Great Falls International
Great Falls · elev 3,680 ft
- 7S7 — Valier
Valier · elev 3,826 ft
- 3U5 — Augusta
Augusta · elev 4,145 ft
- B70 — Tiber Dam
Tiber Dam · elev 3,023 ft
- KSBX — Shelby
Shelby · elev 3,443 ft
Frequently asked questions
How high does density altitude get at 5U1 in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Dutton reaches roughly 6,019 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 5U1 on an average day?
It swings with the seasons: from roughly 2,221 ft at the coldest month's average temperature to about 5,016 ft at the warmest month's — all from a constant field elevation of 3,699 ft. The month-by-month table above carries the full year.
What is the field elevation of Dutton?
3,699 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 5U1 (FAA), in Dutton, Montana.