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First comebooking
May–Sepbest months
About Big Arm Unit
- Managed by: Montana Fish Wildlife & Parks
- Where: 2 mi northwest of Big Arm, MT · 47.81146, -114.31003
Weather by month
32°20°Jan
37°21°Feb
47°27°Mar
56°33°Apr
66°40°May
73°47°Jun
84°52°Jul
83°50°Aug
72°43°Sep
56°33°Oct
40°26°Nov
32°21°Dec
Typical daily highs and lows (°F), 1991–2020 NOAA normals. Best months: May–Sep (comfortable days, mild nights, little rain). Nights below freezing: Nov–Mar.
See Big Arm Unit from above
Fly over it in 3D, check today's weather and fire news, plan the drive and print a trip plan.
Good to know
Cell signal
Verizon 5G · AT&T 5G · T-Mobile 5G
From the carriers' FCC coverage maps, which tend to be generous.Night sky: Truly dark
The Milky Way shows rich detail, horizon to horizon.
Class 2 of 9, from NASA/NOAA night-light data.Stargazing nearby: Lost Trail National Wildlife Refuge (Dark Sky Sanctuary), 26 mi.
RV essentials
Dump station: 23.5 mi
Propane: 22.6 mi