Mahnomen, Minnesota · field elev 1,246 ft
Density Altitude at Mahnomen County (3N8)
Mahnomen County sits at 1,246 ft, and even a typical July afternoon (79 °F) only lifts density altitude to about 2,797 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 | 6.3 | −2,112 ft | 15.2 | −1,457 ft |
| February | 11.4 | −1,735 ft | 21.3 | −1,018 ft |
| March | 24.8 | −768 ft | 34.4 | −96 ft |
| April | 40.9 | 350 ft | 51.9 | 1,089 ft |
| May | 54.6 | 1,267 ft | 66.0 | 2,008 ft |
| June | 63.8 | 1,866 ft | 74.2 | 2,528 ft |
| July | 68.1 | 2,142 ft | 78.5 | 2,797 ft |
| August | 66.5 | 2,040 ft | 78.1 | 2,772 ft |
| September | 57.9 | 1,484 ft | 69.2 | 2,212 ft |
| October | 43.9 | 554 ft | 53.5 | 1,195 ft |
| November | 26.8 | −627 ft | 34.1 | −117 ft |
| December | 13.6 | −1,574 ft | 21.5 | −1,003 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 3N8
DENSITY ALTITUDE
Field elevation 1,246 ft — the air behaves like 2,828 ft.
- PRESSURE ALT
- 1,247 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 Minnesota fields
- D00 — Norman County Ada/Twin Valley
Ada/Twin Valley · elev 954 ft
- KFSE — Fosston Municipal/Anderson Field
Fosston · elev 1,279 ft
- D14 — Fertile Municipal
Fertile · elev 1,137 ft
- KDTL — Detroit Lakes/Wething Field
Detroit Lakes · elev 1,396 ft
- 7Y4 — Bagley Municipal
Bagley · elev 1,503 ft
- 04Y — Hawley Municipal
Hawley · elev 1,210 ft
- D81 — Red Lake Falls Municipal
Red Lake Falls · elev 1,060 ft
- 47Y — Pelican Rapids Municipal-Lyon'S Field
Pelican Rapids · elev 1,389 ft
Frequently asked questions
How high does density altitude get at 3N8 in summer?
On a typical July afternoon — around 79 °F at the nearest NOAA normals station — density altitude at Mahnomen County reaches roughly 2,797 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 3N8 on an average day?
It swings with the seasons: from roughly −2,112 ft at the coldest month's average temperature to about 2,142 ft at the warmest month's — all from a constant field elevation of 1,246 ft. The month-by-month table above carries the full year.
What is the field elevation of Mahnomen County?
1,246 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 3N8 (FAA), in Mahnomen, Minnesota.