| Mount Jefferson | |
|---|---|
 Mount Jefferson as seen from near the summit ofMount Washington, with theGreat Gulf below. | |
| Highest point | |
| Elevation | 5,712 ft (1,741 m) |
| Prominence | 742 ft (226 m) |
| Listing | White Mountain 4000-Footers |
| Coordinates | 44°18′15″N71°19′01″W / 44.30420°N 71.31685°W /44.30420; -71.31685 |
| Geography | |
 | |
| Location | Thompson and Meserve's Purchase,Coös County,New Hampshire, U.S. |
| Parent range | Presidential Range |
| Topo map | USGSMount Washington |
| Climbing | |
| Easiest route | Caps Ridge Trail |
Mount Jefferson is located inCoos County,New Hampshire, and is the third highest mountain in the state. The mountain is named afterThomas Jefferson, the third president of the United States, and is part of thePresidential Range of theWhite Mountains.[1] Mount Jefferson is flanked byMount Adams (to the northeast) andMount Clay (to the south).
The mountain has several interesting features, making it a popular hike. Two distinct ridges lead to its summit: Ridge of the Caps and Castle Ridge. The mountain is surrounded by the three dramatic glacialcirques of Jefferson Ravine, Castle Ravine, and theGreat Gulf. Finally, Monticello Lawn is a large expanse of alpine sedge and rush near the otherwisetalus-covered summit cone. When viewed from the Mount Washington Auto Road, Jefferson features an arrow-shaped bald patch pointing to its summit.
Mount Jefferson has a direct ascent along the Caps Ridge Trail, whose base, Jefferson Notch, is the highest point of any public road in New Hampshire at 3,009 feet (917 m). This route, gaining only 2,700 feet (823 m) vertically to the summit, results in it having the least distance of ascent of any Presidential mountain (about 2.5 miles). However, climbing over the "caps" involves some exposed scrambling and can be steep and challenging at times.
There is no weather station, but this climate table containsinterpolated data. Mount Jefferson has asubarctic climate (KöppenDfc).
| Climate data for Mount Jefferson (NH) 44.2999 N, 71.3152 W, Elevation: 5,322 ft (1,622 m) (1991–2020 normals) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °F (°C) | 15.4 (−9.2) | 16.2 (−8.8) | 22.7 (−5.2) | 33.1 (0.6) | 45.8 (7.7) | 54.3 (12.4) | 58.8 (14.9) | 57.7 (14.3) | 51.8 (11.0) | 39.8 (4.3) | 29.2 (−1.6) | 21.1 (−6.1) | 37.2 (2.9) |
| Daily mean °F (°C) | 7.5 (−13.6) | 8.1 (−13.3) | 15.0 (−9.4) | 26.4 (−3.1) | 39.9 (4.4) | 49.1 (9.5) | 54.1 (12.3) | 52.8 (11.6) | 46.5 (8.1) | 34.1 (1.2) | 22.9 (−5.1) | 13.6 (−10.2) | 30.8 (−0.6) |
| Mean daily minimum °F (°C) | −0.5 (−18.1) | 0.0 (−17.8) | 7.3 (−13.7) | 19.7 (−6.8) | 33.9 (1.1) | 44.0 (6.7) | 49.4 (9.7) | 47.9 (8.8) | 41.1 (5.1) | 28.4 (−2.0) | 16.6 (−8.6) | 6.1 (−14.4) | 24.5 (−4.2) |
| Averageprecipitation inches (mm) | 5.76 (146) | 5.22 (133) | 6.45 (164) | 7.34 (186) | 6.97 (177) | 8.34 (212) | 8.19 (208) | 6.87 (174) | 6.82 (173) | 9.98 (253) | 7.99 (203) | 7.44 (189) | 87.37 (2,218) |
| Source: PRISM Climate Group[2] | |||||||||||||
To find the table data on the PRISM website, start by clickingCoordinates (underLocation); copyLatitude andLongitude figures from top of table; clickZoom to location; clickPrecipitation, Minimum temp, Mean temp, Maximum temp; click30-year normals, 1991-2020; click800m; clickRetrieve Time Series button.
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