Boulder Mountains (Montana)
| Boulder Mountains | |
|---|---|
 | |
| Highest point | |
| Peak | Haystack Mountain |
| Elevation | 8,819 ft (2,688 m) |
| Coordinates | 46°08′29″N 112°19′35″W / 46.14139°N 112.32639°W |
| Geography | |
| Country | United States |
| State | Montana |
| Parent range | Rocky Mountains |
The Boulder Mountains are a mountain range running roughly north to south located west of Boulder between Helena and Butte in the U.S. state of Montana.[1] Parts of the range are in four different counties: Deer Lodge, Jefferson, Lewis and Clark, and Silver Bow.[1]
Haystack Mountain, which reaches 8,819 feet (2,688 m), is the tallest peak in the range.[2][3] The three other highest peaks are Jack Mountain at 8,752 feet (2,668 m), Bull Mountain at 8,609 feet (2,624 m), and Thunderbolt Mountain at 8,597 feet (2,620 m).[2] All four peaks are in Jefferson County.[2]
Climate
[edit]Rocker Peak, 8,455 ft (2,577 m),[4] is near Jack Mountain (Montana), the second highest peak in the Boulder Mountains.[5] There is a SNOTEL weather station near the summit of Rocker Peak at an elevation of 8,000 ft (2,438 m). Rocker Peak has a subalpine climate (Köppen Dfc), bordering on an Alpine climate (Köppen ET).
| Climate data for Rocker Peak, Montana, 1991–2020 normals, 1983-2020 extremes: 8000ft (2438m) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °F (°C) | 55 (13) | 53 (12) | 58 (14) | 66 (19) | 73 (23) | 81 (27) | 85 (29) | 85 (29) | 81 (27) | 72 (22) | 59 (15) | 48 (9) | 85 (29) |
| Mean maximum °F (°C) | 43.2 (6.2) | 43.4 (6.3) | 49.6 (9.8) | 56.5 (13.6) | 63.8 (17.7) | 71.4 (21.9) | 77.1 (25.1) | 76.2 (24.6) | 72.1 (22.3) | 62.1 (16.7) | 49.0 (9.4) | 40.7 (4.8) | 78.2 (25.7) |
| Mean daily maximum °F (°C) | 26.8 (−2.9) | 27.6 (−2.4) | 34.2 (1.2) | 39.6 (4.2) | 48.0 (8.9) | 55.8 (13.2) | 66.4 (19.1) | 65.4 (18.6) | 55.8 (13.2) | 42.4 (5.8) | 31.6 (−0.2) | 25.1 (−3.8) | 43.2 (6.2) |
| Daily mean °F (°C) | 20.2 (−6.6) | 19.8 (−6.8) | 25.5 (−3.6) | 30.5 (−0.8) | 38.8 (3.8) | 45.9 (7.7) | 54.9 (12.7) | 54.1 (12.3) | 46.1 (7.8) | 34.5 (1.4) | 24.9 (−3.9) | 18.9 (−7.3) | 34.5 (1.4) |
| Mean daily minimum °F (°C) | 13.6 (−10.2) | 12.2 (−11.0) | 16.8 (−8.4) | 21.4 (−5.9) | 29.6 (−1.3) | 36.0 (2.2) | 43.5 (6.4) | 42.9 (6.1) | 36.3 (2.4) | 26.7 (−2.9) | 18.2 (−7.7) | 12.6 (−10.8) | 25.8 (−3.4) |
| Mean minimum °F (°C) | −8.1 (−22.3) | −8.8 (−22.7) | −2.0 (−18.9) | 7.0 (−13.9) | 16.6 (−8.6) | 26.6 (−3.0) | 34.0 (1.1) | 32.2 (0.1) | 22.3 (−5.4) | 8.4 (−13.1) | −1.2 (−18.4) | −7.8 (−22.1) | −19.7 (−28.7) |
| Record low °F (°C) | −30 (−34) | −42 (−41) | −24 (−31) | −8 (−22) | 7 (−14) | 16 (−9) | 16 (−9) | 16 (−9) | 4 (−16) | −11 (−24) | −27 (−33) | −39 (−39) | −42 (−41) |
| Average precipitation inches (mm) | 2.07 (53) | 2.16 (55) | 2.58 (66) | 3.50 (89) | 3.58 (91) | 4.08 (104) | 1.72 (44) | 1.52 (39) | 1.80 (46) | 2.16 (55) | 2.24 (57) | 2.11 (54) | 29.52 (753) |
| Source 1: XMACIS2[6] | |||||||||||||
| Source 2: NOAA (Precipitation)[7] | |||||||||||||
See also
[edit]References
[edit]- ^ a b "Boulder Mountains". Geographic Names Information System. United States Geological Survey. October 27, 2000. Retrieved January 23, 2013.
- ^ a b c "Montana's Tallest Peaks by Mountain Range". Montana State Library. Retrieved January 23, 2013.
- ^ "Haystack Mountain". Geographic Names Information System. United States Geological Survey. November 28, 1980. Retrieved January 23, 2013.
- ^ "Rocker Peak". Peakery. Retrieved November 23, 2023.
- ^ "Montana's Tallest Peaks by Mountain Range". Montana.gov. Retrieved November 23, 2023.
- ^ "xmACIS2". National Oceanic and Atmospheric Administration. Retrieved November 23, 2023.
- ^ "Rocker Peak, Montana 1991-2020 Monthly Normals". Retrieved November 23, 2023.
