Ryegate, Montana · field elev 3,689 ft
Density Altitude at Ryegate (8U0)
From a field elevation of 3,689 ft, a typical July afternoon at Ryegate (86 °F) raises density altitude to about 6,218 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 | 26.2 | 2,382 ft | 37.7 | 3,166 ft |
| February | 28.4 | 2,534 ft | 40.6 | 3,360 ft |
| March | 37.1 | 3,126 ft | 50.6 | 4,019 ft |
| April | 44.7 | 3,632 ft | 58.4 | 4,522 ft |
| May | 53.3 | 4,194 ft | 67.1 | 5,072 ft ▲ |
| June | 62.0 | 4,751 ft | 75.9 | 5,617 ft ▲ |
| July | 69.6 | 5,228 ft | 85.8 | 6,218 ft ▲ |
| August | 68.3 | 5,147 ft | 85.4 | 6,194 ft ▲ |
| September | 58.9 | 4,554 ft | 75.6 | 5,599 ft ▲ |
| October | 46.5 | 3,751 ft | 61.0 | 4,688 ft |
| November | 34.1 | 2,923 ft | 45.7 | 3,698 ft |
| December | 25.9 | 2,361 ft | 37.7 | 3,166 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 8U0
DENSITY ALTITUDE caution
Field elevation 3,689 ft — the air behaves like 6,230 ft.
- PRESSURE ALT
- 3,691 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
- 80S — Lavina
Lavina · elev 3,512 ft
- KHWQ — Wheatland County At Harlowton
Harlowton · elev 4,312 ft
- KRPX — Roundup
Roundup · elev 3,490 ft
- 6S3 — Woltermann Meml
Columbus · elev 3,578 ft
- 6S8 — Laurel Municipal
Laurel · elev 3,543 ft
- KBIL — Billings Logan International
Billings · elev 3,662 ft
- 6S0 — Big Timber At Howard Field
Big Timber · elev 4,494 ft
- KLWT — Lewistown Municipal
Lewistown · elev 4,170 ft
Frequently asked questions
How high does density altitude get at 8U0 in summer?
On a typical July afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Ryegate reaches roughly 6,218 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 8U0 on an average day?
It swings with the seasons: from roughly 2,361 ft at the coldest month's average temperature to about 5,228 ft at the warmest month's — all from a constant field elevation of 3,689 ft. The month-by-month table above carries the full year.
What is the field elevation of Ryegate?
3,689 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 8U0 (FAA), in Ryegate, Montana.