Opheim, Montana · field elev 3,264 ft
Density Altitude at Opheim (S00)
From a field elevation of 3,264 ft, a typical August afternoon at Opheim (81 °F) raises density altitude to about 5,430 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 | 11.2 | 791 ft | 21.6 | 1,531 ft |
| February | 14.8 | 1,049 ft | 25.7 | 1,818 ft |
| March | 26.5 | 1,873 ft | 38.1 | 2,666 ft |
| April | 40.0 | 2,794 ft | 53.8 | 3,704 ft |
| May | 50.8 | 3,508 ft | 65.4 | 4,445 ft |
| June | 59.4 | 4,064 ft | 73.1 | 4,927 ft |
| July | 65.7 | 4,464 ft | 81.1 | 5,418 ft ▲ |
| August | 64.9 | 4,414 ft | 81.3 | 5,430 ft ▲ |
| September | 54.6 | 3,755 ft | 70.4 | 4,759 ft |
| October | 41.1 | 2,867 ft | 54.3 | 3,736 ft |
| November | 26.2 | 1,852 ft | 37.1 | 2,599 ft |
| December | 14.4 | 1,021 ft | 24.8 | 1,755 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 S00
DENSITY ALTITUDE caution
Field elevation 3,264 ft — the air behaves like 5,412 ft.
- PRESSURE ALT
- 3,266 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
- 9S2 — Scobey
Scobey · elev 2,434 ft
- 6U5 — Hinsdale
Hinsdale · elev 2,220 ft
- KGGW — Wokal Field/Glasgow-Valley County
Glasgow · elev 2,296 ft
- 8U3 — Scobey Border Station/East Poplar International
Scobey · elev 2,501 ft
- 37S — Fort Peck
Fort Peck · elev 2,290 ft
- KOLF — L M Clayton
Wolf Point · elev 1,989 ft
- PO1 — Poplar Municipal
Poplar · elev 2,037 ft
- M75 — Malta
Malta · elev 2,254 ft
Frequently asked questions
How high does density altitude get at S00 in summer?
On a typical August afternoon — around 81 °F at the nearest NOAA normals station — density altitude at Opheim reaches roughly 5,430 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 S00 on an average day?
It swings with the seasons: from roughly 791 ft at the coldest month's average temperature to about 4,464 ft at the warmest month's — all from a constant field elevation of 3,264 ft. The month-by-month table above carries the full year.
What is the field elevation of Opheim?
3,264 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is S00 (FAA), in Opheim, Montana.