Jamestown, North Dakota · field elev 1,500 ft
Density Altitude at Jamestown Regional (KJMS)
Jamestown Regional sits at 1,500 ft, and even a typical July afternoon (81 °F) only lifts density altitude to about 3,275 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 | 10.1 | −1,510 ft | 19.3 | −842 ft |
| February | 14.1 | −1,218 ft | 23.5 | −542 ft |
| March | 27.0 | −295 ft | 36.6 | 372 ft |
| April | 41.4 | 700 ft | 52.9 | 1,469 ft |
| May | 54.7 | 1,587 ft | 66.7 | 2,365 ft |
| June | 65.0 | 2,256 ft | 76.1 | 2,958 ft |
| July | 69.7 | 2,555 ft | 81.2 | 3,275 ft |
| August | 67.5 | 2,416 ft | 79.9 | 3,194 ft |
| September | 58.4 | 1,829 ft | 70.9 | 2,631 ft |
| October | 43.8 | 862 ft | 54.7 | 1,587 ft |
| November | 28.4 | −197 ft | 37.8 | 454 ft |
| December | 15.8 | −1,094 ft | 24.3 | −486 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 KJMS
DENSITY ALTITUDE
Field elevation 1,500 ft — the air behaves like 3,263 ft.
- PRESSURE ALT
- 1,501 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 North Dakota fields
- KBAC — Barnes County Municipal
Valley City · elev 1,402 ft
- 9G9 — Gackle Municipal
Gackle · elev 1,904 ft
- 51D — Edgeley Municipal
Edgeley · elev 1,604 ft
- 46D — Carrington Municipal
Carrington · elev 1,607 ft
- S32 — Cooperstown Municipal
Cooperstown · elev 1,424 ft
- 4F9 — La Moure Rott Municipal
La Moure · elev 1,310 ft
- D03 — Kulm Municipal
Kulm · elev 1,959 ft
- 5N4 — Sky Haven
Enderlin · elev 1,151 ft
Frequently asked questions
How high does density altitude get at KJMS in summer?
On a typical July afternoon — around 81 °F at the nearest NOAA normals station — density altitude at Jamestown Regional reaches roughly 3,275 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 KJMS on an average day?
It swings with the seasons: from roughly −1,510 ft at the coldest month's average temperature to about 2,555 ft at the warmest month's — all from a constant field elevation of 1,500 ft. The month-by-month table above carries the full year.
What is the field elevation of Jamestown Regional?
1,500 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KJMS (ICAO) / JMS (FAA), in Jamestown, North Dakota.