Winter bird bath water in Montana
Across 22 Montana cities, the typical winter night drops to 15.8°F and the day climbs to 34.3°F. Expect around 76 nights a year at 28°F or below, when a shallow bath freezes solid.
De-icers for this climate
Our de-icers are 120V and sold for US and Canadian outlets. Check the wattage against the bath size on each listing.
Stainless Steel Pond and Birdbath Deicer
A stainless steel dome heater that sits in a pond or large birdbath and keeps a patch of water open through freezing weather, so birds can still drink and bathe in winter. It has a built-in thermostat and a dry-run cut-off that switches the heater off if it's left out of water. Dimensions: 180 mm (7.1 in) across, 83.9 mm (3.3 in) tall Material: stainless steel dome, black power cord Power options: 100W, 150W, 200W, 250W or 300W. Smaller birdbaths need less power; ponds and very cold areas need more. Weight: about 1.9 kg (4.1 lb) Plug: US 3-prong, 120V Use with a GFCI-protected outdoor outlet. Keep the cord out of reach of pets and away from where people walk.
70W Trough and Bath Deicer
A 70-watt submersible deicer that keeps a small open-water area in a bird bath or livestock trough through hard freezes. Runs on standard 120V US household power with a thermostatic control that switches on near freezing and off when the water is ice-free, so it does not run continuously.Specs: 70 W, 120V US plug, submersible sealed element, black housing. Sized for small baths and troughs; it keeps a drinking hole open rather than warming the whole bath — birds only need liquid water, not warm water.Safety note: this is an electrical appliance used outdoors in water. We list it only once a valid UL/ETL safety certification is confirmed. Always plug into a GFCI-protected outdoor outlet and route the cord so birds and pets cannot chew it.
Birdbath Deicer with Auto Shut-Off
A compact birdbath deicer with a built-in thermostat and automatic shut-off. It sits in the basin and keeps a patch of water ice-free so birds can drink through winter — liquid water is harder for birds to find than food in a hard freeze.Specs: thermostatically controlled (activates near freezing, shuts off automatically), US plug, white housing that blends into light-colored basins.Safety note: this is an electrical appliance used outdoors in water. We list it only once a valid UL/ETL safety certification is confirmed. Always use a GFCI-protected outdoor outlet, and never run it in a dry basin.
- Cities averaged
- 22
- Nights at or below 32°F
- 175 a year
- Hard-freeze nights (≤28°F)
- 76 a year
- Days the high stays ≤32°F
- 44 a year
- Nights at or below 0°F
- 15 a year
- Typical first freeze
- October 1
- Typical last freeze
- May 10
- Median annual snowfall
- 33 in
- Coldest winter lows
- Butte-Silver Bow (balance) (8.3°F)
- Mildest winter lows
- Polson (22°F)
Medians of each city's nearest NOAA 1991–2020 climate normals station. Your own yard can run several degrees colder in a low spot or warmer near a south wall.
Do you need a heater in Montana?
Yes. With highs at or below freezing on about 44 days a year and 15 nights below zero, an unheated bath is ice for weeks. Choose a de-icer rated for the bath size, and a deeper basin keeps heat better than a shallow dish. Wind matters as much as temperature: put the bath out of the prevailing wind if you can.
Set up a heated bath safely
- Plug into a GFCI-protected outdoor outlet. Use an outdoor-rated extension cord only if you have to, and keep the connection off the ground.
- Choose a de-icer with a thermostat and automatic shut-off if the bath runs dry.
- Keep water no deeper than 2 inches at the edge so small birds can stand.
- Never add antifreeze, salt or glycerin. They harm birds and do not keep water drinkable.
- Top up often. Heated water evaporates faster, and a dry de-icer can damage itself or a plastic basin.
Birds that stay through winter in Montana
These feeder birds are present here in winter, either all year or only for the cold months. Each link shows the feeder style that suits it.
- Common Redpollwinter visitor
- American Tree Sparrowwinter visitor
- Hooded Merganserwinter visitor
- Snow Buntingwinter visitor
- Lapland Longspurwinter visitor
- Hoary Redpollwinter visitor
- White-winged Crossbillwinter visitor
- Bohemian Waxwingwinter visitor
- Black-capped Chickadee
- Downy Woodpecker
- Hairy Woodpecker
- White-breasted Nuthatch
- House Finch
- Mourning Dove
- American Robin
- Dark-eyed Junco
Related guides
Frequently asked
Do I need a heated bird bath in Montana?
Yes, if you want birds to have water all winter. The typical Montana city has 76 hard-freeze nights a year and 44 days when the high stays at or below freezing. An unheated bath will be solid ice for much of that time.
When does bird bath water start freezing in Montana?
The most common first freeze date across Montana cities is around October 1, and the last spring freeze is around May 10. Set up a heater a week or two before the first date and take it down after the last.
Which birds use a bird bath in winter in Montana?
Feeder birds that stay through winter here include Common Redpoll, American Tree Sparrow, Hooded Merganser, Snow Bunting, Lapland Longspur, Hoary Redpoll, White-winged Crossbill, Bohemian Waxwing. Open water draws birds that never visit seed feeders too.
Is a heated bird bath safe?
Use a de-icer with a thermostat that switches on only near freezing, plug it into a GFCI outdoor outlet, and keep the cord out of the water and away from mower paths. Never add antifreeze, salt or glycerin to bird water.