Tower, Minnesota · field elev 1,370 ft
Density Altitude at Tower Municipal (12D)
Tower Municipal sits at 1,370 ft, and even a typical July afternoon (77 °F) only lifts density altitude to about 2,862 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 | 4.9 | −2,059 ft | 16.8 | −1,185 ft |
| February | 9.1 | −1,748 ft | 23.1 | −734 ft |
| March | 22.7 | −762 ft | 36.3 | 189 ft |
| April | 37.0 | 238 ft | 49.6 | 1,090 ft |
| May | 49.9 | 1,109 ft | 63.3 | 1,987 ft |
| June | 59.7 | 1,754 ft | 72.7 | 2,586 ft |
| July | 64.0 | 2,032 ft | 77.1 | 2,862 ft |
| August | 61.9 | 1,896 ft | 75.5 | 2,762 ft |
| September | 54.0 | 1,381 ft | 66.6 | 2,199 ft |
| October | 41.0 | 511 ft | 51.4 | 1,209 ft |
| November | 26.4 | −500 ft | 35.0 | 100 ft |
| December | 12.5 | −1,498 ft | 22.0 | −812 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 12D
DENSITY ALTITUDE
Field elevation 1,370 ft — the air behaves like 2,855 ft.
- PRESSURE ALT
- 1,371 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
- KCQM — Cook Municipal
Cook · elev 1,329 ft
- KELO — Ely Municipal
Ely · elev 1,456 ft
- KEVM — Eveleth/Virginia Municipal
Eveleth · elev 1,376 ft
- KORB — Orr Regional
Orr · elev 1,313 ft
- KHIB — Range Regional
Hibbing · elev 1,354 ft
- KTWM — Richard B Helgeson
Two Harbors · elev 1,073 ft
- KFOZ — Bigfork Municipal
Bigfork · elev 1,351 ft
- KDLH — Duluth International
Duluth · elev 1,428 ft
Frequently asked questions
How high does density altitude get at 12D in summer?
On a typical July afternoon — around 77 °F at the nearest NOAA normals station — density altitude at Tower Municipal reaches roughly 2,862 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 12D on an average day?
It swings with the seasons: from roughly −2,059 ft at the coldest month's average temperature to about 2,032 ft at the warmest month's — all from a constant field elevation of 1,370 ft. The month-by-month table above carries the full year.
What is the field elevation of Tower Municipal?
1,370 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 12D (FAA), in Tower, Minnesota.