Grantsburg, Wisconsin · field elev 927 ft
Density Altitude at Grantsburg Municipal (KGTG)
Grantsburg Municipal sits at 927 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 2,650 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 | 11.7 | −2,115 ft | 22.2 | −1,353 ft |
| February | 16.6 | −1,757 ft | 28.2 | −927 ft |
| March | 29.5 | −836 ft | 41.1 | −33 ft |
| April | 43.1 | 103 ft | 55.5 | 933 ft |
| May | 56.3 | 985 ft | 69.1 | 1,814 ft |
| June | 65.8 | 1,603 ft | 78.1 | 2,382 ft |
| July | 70.2 | 1,884 ft | 82.4 | 2,650 ft |
| August | 68.1 | 1,750 ft | 80.4 | 2,526 ft |
| September | 59.8 | 1,214 ft | 72.3 | 2,018 ft |
| October | 46.3 | 320 ft | 57.5 | 1,064 ft |
| November | 31.5 | −696 ft | 40.7 | −60 ft |
| December | 18.4 | −1,627 ft | 27.2 | −998 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 KGTG
DENSITY ALTITUDE
Field elevation 927 ft — the air behaves like 2,625 ft.
- PRESSURE ALT
- 928 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 Wisconsin fields
- KRZN — Burnett County
Siren · elev 989 ft
- KOEO — L O Simenstad Municipal
Osceola · elev 906 ft
- KSSQ — Shell Lake Municipal
Shell Lake · elev 1,233 ft
- KAHH — Amery Municipal
Amery · elev 1,088 ft
- KUBE — Cumberland Municipal
Cumberland · elev 1,243 ft
- 1H9 — Nest Of Eagles
Spooner · elev 1,115 ft
- KRNH — New Richmond Regional
New Richmond · elev 998 ft
- 9Y7 — Barron Municipal
Barron · elev 1,110 ft
Frequently asked questions
How high does density altitude get at KGTG in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Grantsburg Municipal reaches roughly 2,650 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 KGTG on an average day?
It swings with the seasons: from roughly −2,115 ft at the coldest month's average temperature to about 1,884 ft at the warmest month's — all from a constant field elevation of 927 ft. The month-by-month table above carries the full year.
What is the field elevation of Grantsburg Municipal?
927 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KGTG (ICAO) / GTG (FAA), in Grantsburg, Wisconsin.