Source-backed summary
Hosmer Grove lies in the cloud belt of Haleakalā, just below the 7,000 foot level (2134m) in the Summit District. Be prepared for rain and cold weather.
Current weather
Loading current conditions…Pet suitability
Checking verified info…Weather guidance uses air temperature only; humidity or hot pavement may increase risk.
Online info—check with the campground or park before planning.
Uses verified pet access, leash rules, and air temperature.
Network availability
- AT&T4G LTE
- T-Mobile4G LTE
- Verizon4G LTE
FCC-modeled outdoor coverage is not a guarantee of real-world signal. Terrain, weather, devices, and local conditions can affect service.
FCC data released 2025-12-31.
Amenities
About Hosmer Grove Campground
Hosmer Grove lies in the cloud belt of Haleakalā, just below the 7,000 foot level (2134m) in the Summit District. Be prepared for rain and cold weather. Nighttime temperatures can drop into the to near freezing (0°C); daytime highs average 50-65°F (10-18°C). The campground has picnic tables, barbeque grills, drinking water, and pit toilets. Overnight stays are limited to three (3) nights total for all Park areas in a thirty day period. Pets are not permitted in or around campsite facilities.