Starlink in winter.

Snow piling up on the dish, ice on the cable, minus 30 nights. What actually happens when you run Starlink through a real winter, and what you should do differently if you live somewhere cold.

The short version

Starlink handles winter better than most people expect. The dish has a built-in heater that melts snow off the surface automatically. It is rated to operate down to minus 22 Fahrenheit (minus 30 Celsius). Real-world uptime through a serious winter typically hits 99 percent or better. The two real issues are heavy snow accumulation faster than the heater can melt, and obstructions you did not notice in summer suddenly mattering when bare branches collect ice.

How the dish handles snow

The Starlink dish has a heating element built into the antenna surface. When snow lands on it, the heater warms the surface above freezing and the snow melts off, usually within a few minutes for light snow. For heavier falls, melt time stretches to 15 or 30 minutes. The dish stays operational throughout (it does not drop offline while melting), but speeds can dip during heavy accumulation as the snow temporarily blocks signal.

The heater is automatic. There is no on/off switch in the app. It runs whenever the dish detects snow on the surface, which it does using temperature and signal-strength heuristics. You will see the dish's power draw spike from its normal 50 to 75 watts up to 100 to 130 watts when the heater is active. This shows up on power monitors but not in the app.

Practical implication: if you are running off-grid on solar, factor in the higher winter power draw. A panel array sized for summer use can struggle in February when the heater runs frequently and the sun is weak. Most off-grid users either oversize the array or accept a few daily outages during heavy snow.

Where the heater struggles

The heater is good but not invincible. It loses to:

• Heavy snowfall (more than ~2 inches per hour). Snow accumulates faster than it can melt. Speeds drop, sometimes the dish drops offline briefly until accumulation tapers.
• Wet snow that freezes into ice. A thin ice layer is harder to melt than fresh snow. After a freezing-rain event, you might need to manually clear the dish surface.
• Snow piles around the dish. The heater clears the surface but does not stop snow from drifting and piling around the dish base or against the side, which can eventually block the signal angle.
• Continuous snow over multiple days. Even good snow shedding loses to a 48-hour blizzard. Expect performance degradation during prolonged events.

For the vast majority of winter days in cold-but-not-arctic climates (US Midwest, Canadian prairies, Scandinavia, central Europe), the heater handles things on its own. For exceptional storms, manual clearing might be needed once or twice per winter.

Mounting tips for cold climates

If you live somewhere with serious winter, do these things during summer install:

Mount as high and clear as practical

Snow accumulates around obstructions. A dish on a 6-foot pole well above the snowpack stays clear; a dish at ground level can disappear under a drift. Roof mounts work well because heat from the building helps prevent ice formation around the base.

Plan for ice loading on the cable

The Starlink cable is rated for outdoor use, but a long horizontal run that accumulates 2 inches of ice can sag enough to disconnect at the connector. Either route the cable as vertically as possible, or add intermediate strain relief points. Plastic cable clips on a deck rail every 4 feet usually do the trick.

Watch out for "summer line of sight" obstructions

Bare deciduous branches in winter can collect ice and become much wider than summer foliage. A tree that gives clean sky view in July might block 10 percent of the signal in February. The Starlink app's obstruction view will show you. If your install was marginal in summer, recheck after the first ice storm.

Surge protection matters more in winter

Winter brings ice storms, which bring downed lines, which bring power surges. A proper outdoor surge protector for the dish data line ($30 to $80) is cheap insurance. Skipping it is how Starlink dishes die.

Cold weather operation

The dish itself runs fine in extreme cold. Operating temperature is rated to minus 22 F / minus 30 C, and real-world reports from interior Alaska and northern Canada confirm it works at colder temperatures than that, though Starlink does not officially guarantee it. The heating element keeps the antenna surface warm enough to operate even when the air is brutally cold.

The router and power supply, on the other hand, are typically inside the house and not affected by outside temperatures.

One thing to know: cold start times can be slower. After a power cycle in extreme cold, the dish sometimes takes 5 to 15 minutes to come back online versus the usual 1 to 2 minutes in mild weather. This is normal. The dish is warming itself up to operational temperature before connecting.

The 99 percent uptime number

Across pooled user reports from northern climates (Canada, Alaska, Sweden, Norway, Russia before the ban), winter uptime consistently runs 98 to 99.5 percent. That is roughly 4 to 14 hours of total downtime over a 90-day winter. Most of that downtime is during specific blizzards or ice storms, not random.

For comparison, that is better uptime than most rural DSL services in the same areas, and competitive with cable. Worse than fiber, which is why fiber wins anywhere it is available.

What to do if you live somewhere very cold

• Mount above the snowpack. 6 feet up, minimum.
• Clear physical drifts away from the dish base monthly during heavy snow.
• Add surge protection. Ice storms cause power surges.
• Keep a long-handled broom near the door for the once-a-winter manual clear.
• If off-grid, oversize your solar/battery to handle the heater's 30 to 50 watt boost.
• Recheck obstruction view after the leaves drop. Bare branches with ice are different from summer foliage.

Beyond that, leave it alone. The dish does the work itself most of the time. After a real winter, most cold-climate users come out of it with surprisingly few complaints.