Montague, California · field elev 2,527 ft
Density Altitude at Montague-Yreka Rohrer Field (1O5)
From a field elevation of 2,527 ft, a typical July afternoon at Montague-Yreka Rohrer Field (93 °F) raises density altitude to about 5,263 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 | 36.7 | 1,656 ft | 47.2 | 2,361 ft |
| February | 39.8 | 1,866 ft | 52.5 | 2,711 ft |
| March | 44.4 | 2,175 ft | 58.2 | 3,081 ft |
| April | 48.9 | 2,474 ft | 63.7 | 3,434 ft |
| May | 57.2 | 3,016 ft | 73.7 | 4,064 ft |
| June | 64.9 | 3,510 ft | 82.8 | 4,624 ft |
| July | 74.0 | 4,082 ft | 93.4 | 5,263 ft ▲ |
| August | 72.4 | 3,983 ft | 92.2 | 5,191 ft ▲ |
| September | 64.9 | 3,510 ft | 84.4 | 4,722 ft |
| October | 52.8 | 2,730 ft | 69.6 | 3,807 ft |
| November | 41.9 | 2,008 ft | 54.2 | 2,822 ft |
| December | 35.8 | 1,595 ft | 45.7 | 2,262 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 1O5
DENSITY ALTITUDE caution
Field elevation 2,527 ft — the air behaves like 5,239 ft.
- PRESSURE ALT
- 2,529 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 California fields
- KSIY — Siskiyou County
Montague · elev 2,651 ft
- O46 — Weed
Weed · elev 2,943 ft
- A30 — Scott Valley
Fort Jones · elev 2,728 ft
- A32 — Butte Valley
Dorris · elev 4,243 ft
- 1O6 — Dunsmuir Municipal-Mott
Dunsmuir · elev 3,261 ft
- 36S — Happy Camp
Happy Camp · elev 1,209 ft
- O86 — Trinity Center
Trinity Center · elev 2,390 ft
- O81 — Tulelake Municipal
Tulelake · elev 4,049 ft
Frequently asked questions
How high does density altitude get at 1O5 in summer?
On a typical July afternoon — around 93 °F at the nearest NOAA normals station — density altitude at Montague-Yreka Rohrer Field reaches roughly 5,263 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 1O5 on an average day?
It swings with the seasons: from roughly 1,595 ft at the coldest month's average temperature to about 4,082 ft at the warmest month's — all from a constant field elevation of 2,527 ft. The month-by-month table above carries the full year.
What is the field elevation of Montague-Yreka Rohrer Field?
2,527 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 1O5 (FAA), in Montague, California.