Hermiston, Oregon · field elev 644 ft
Density Altitude at Hermiston Municipal (KHRI)
Hermiston Municipal sits at 644 ft, and even a typical July afternoon (93 °F) only lifts density altitude to about 2,936 ft — heat still trims performance, but the field rarely turns high-and-hot.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 36.0 | −736 ft | 43.3 | −235 ft |
| February | 39.3 | −508 ft | 49.4 | 177 ft |
| March | 46.4 | −25 ft | 59.1 | 820 ft |
| April | 52.8 | 404 ft | 66.6 | 1,306 ft |
| May | 61.2 | 957 ft | 76.2 | 1,917 ft |
| June | 67.6 | 1,371 ft | 82.2 | 2,292 ft |
| July | 75.6 | 1,879 ft | 92.7 | 2,936 ft |
| August | 73.9 | 1,772 ft | 91.0 | 2,833 ft |
| September | 64.6 | 1,177 ft | 81.2 | 2,230 ft |
| October | 52.7 | 397 ft | 66.5 | 1,300 ft |
| November | 41.5 | −358 ft | 50.7 | 264 ft |
| December | 35.2 | −791 ft | 42.1 | −317 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 KHRI
DENSITY ALTITUDE
Field elevation 644 ft — the air behaves like 2,954 ft.
- PRESSURE ALT
- 645 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 Oregon fields
- KPDT — Eastern Oregon Regional At Pendleton
Pendleton · elev 1,494 ft
- M50 — Boardman
Boardman · elev 396 ft
- 9S9 — Lexington
Lexington · elev 1,635 ft
- 1S8 — Arlington Municipal
Arlington · elev 890 ft
- 3S9 — Condon State Pauling Field
Condon · elev 2,911 ft
- 12S — Monument Municipal
Monument · elev 2,323 ft
- 35S — Wasco State
Wasco · elev 1,503 ft
- KLGD — La Grande/Union County
La Grande · elev 2,718 ft
Frequently asked questions
How high does density altitude get at KHRI in summer?
On a typical July afternoon — around 93 °F at the nearest NOAA normals station — density altitude at Hermiston Municipal reaches roughly 2,936 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 KHRI on an average day?
It swings with the seasons: from roughly −791 ft at the coldest month's average temperature to about 1,879 ft at the warmest month's — all from a constant field elevation of 644 ft. The month-by-month table above carries the full year.
What is the field elevation of Hermiston Municipal?
644 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KHRI (ICAO) / HRI (FAA), in Hermiston, Oregon.