How to Keep Your Smart Lock Working in Cold Weather
By August Home | Smart Locks for Convenient, Keyless Entry | Published: 2026-10-14
Category: Tips & Care
Cold weather can slow your smart lock's motor and drain its batteries. Follow these steps to keep keyless entry reliable all winter.
Quick answer
Cold weather thickens lubricants and reduces battery output, so your smart lock may respond slowly or fail to turn the deadbolt. Before the first freeze, lubricate the deadbolt with a dry graphite or silicone spray, switch to fresh lithium batteries, and confirm your lock's auto-lock and remote features still work. If your lock uses a Wi-Fi bridge for remote access, keep the bridge indoors where temperatures stay above freezing.
Why cold weather affects smart locks differently than mechanical locks
A mechanical deadbolt only needs your hand to turn it. A smart lock adds a motor, a battery pack, and sometimes a Wi-Fi radio that must all work together. Cold temperatures slow the chemical reaction inside standard alkaline batteries, which reduces the current available to drive the motor. At the same time, the lubricant inside the deadbolt mechanism can thicken, increasing the force needed to throw or retract the bolt. The result is a lock that hesitates, sounds strained, or reports a jam in the app even though nothing is mechanically broken.
The fix is not to overpower the problem with a bigger battery. It is to reduce friction and keep the electronics within their operating range. That means treating the deadbolt as a mechanical system and the lock as an electronic one, then checking both before winter arrives.
What you can and cannot control from the app
Most August and Yale smart locks let you adjust auto-lock timing, turn off auto-unlock, and check battery level remotely. Those settings help in cold weather because they reduce how often the motor runs. What you cannot control from the app is the physical condition of the deadbolt, the alignment of the strike plate, or the temperature inside the battery compartment. If the door frame shifts with seasonal humidity changes, the bolt may rub even when the lock itself is fine. A lock that works perfectly in July can bind in January because the gap between the door and frame changed by a few millimeters.
Check the mechanical alignment first. Then use app settings to reduce unnecessary motor cycles. That order prevents you from chasing a software fix for a hardware problem.
When to call for help instead of troubleshooting
If the deadbolt turns freely by hand but the smart lock still fails in cold weather, the issue is likely internal to the lock or its power source. If the deadbolt does not turn freely by hand, the problem is mechanical and no app setting will fix it. In that case, stop running the motor against resistance, because repeated stalled attempts can drain the battery quickly and may damage the gear assembly. For locks still under warranty, contact the manufacturer before disassembling anything. For older locks, a locksmith can ream or replace the deadbolt more safely than forcing it.
Winter prep steps for your smart lock
- 1. Test the deadbolt by hand before touching the lock: With the door open, turn the thumbturn by hand. It should move smoothly with light pressure. If it feels gritty or stiff, the problem is the bolt, not the smart lock. Common mistake: assuming a slow motor means a dying battery when the real issue is a dry or misaligned deadbolt. If the bolt binds by hand, fix that first. No battery change will solve it.
- 2. Lubricate the deadbolt with a dry spray, not oil: Use graphite powder or a silicone-based dry lubricant inside the bolt channel and on the strike plate. Wipe away excess. Avoid wet oils and greases, which thicken in cold weather and attract grit. Common mistake: spraying WD-40 or household oil, which can gum up at freezing temperatures and make the bolt harder to turn. Dry lubricant only. If you already used oil, clean the bolt with a degreaser before applying dry spray.
- 3. Switch to fresh lithium batteries before the first freeze: Alkaline batteries lose voltage faster in cold. Lithium batteries handle low temperatures better and last longer in locks that sit on an exterior door. Replace all batteries at the same time and check the app for a battery-level reading after installation. Common mistake: mixing old and new batteries or using rechargeables that report a lower voltage and trigger false low-battery warnings. Mark your calendar to recheck battery level in January, even if the app showed full in November.
- 4. Reduce motor cycles with app settings: In the August App, extend the auto-lock delay or turn auto-lock off temporarily if your door is inside a secured entryway. Disable auto-unlock if you do not need it, since that feature keeps the radio active and can drain batteries faster in cold. Common mistake: leaving auto-unlock on for convenience while the lock struggles to turn, which compounds battery drain and motor strain. Fewer automatic cycles means more battery reserve for the times you actually need the motor.
- 5. Check door alignment and strike plate clearance: Close the door and watch the bolt as it enters the strike plate. If it rubs the top or bottom of the opening, the door has shifted with seasonal humidity. Adjust the strike plate or hinge screws so the bolt drops in without resistance. Common mistake: forcing the lock to overcome a misaligned strike, which makes the motor work harder and drains the battery faster. A bolt that enters cleanly by hand will enter cleanly with the motor.
- 6. Keep the Wi-Fi bridge and hub indoors: If you use an August Connect Wi-Fi bridge for remote access, plug it into an indoor outlet where temperatures stay above freezing. Cold can affect the bridge's reliability even if the lock itself is rated for exterior use. Common mistake: placing the bridge in a garage or unheated mudroom, then blaming the lock when remote access drops. Remote access depends on the bridge, so treat it as an indoor device.
- 7. Test keypad and backup entry before the storm: If your lock includes a keypad, enter your code with cold hands or gloves to confirm the buttons respond. Keep a physical key or a second entry method available in case the battery dies during a freeze. Common mistake: assuming the keypad will work the same at 20°F as it does at 70°F without testing it. A two-minute test in the cold is better than being locked out in a storm.
Product facts that matter in winter
- August Smart Lock: August Smart Lock provides keyless entry and phone control; remote access requires an optional Connect Wi-Fi bridge. If you rely on remote access in winter, the bridge must stay indoors where it will not freeze, and you should confirm it is connected before the first storm.
- August Wi-Fi Smart Lock + Deadbolt in Oil Rubbed Bronze: August Wi-Fi Smart Lock + Deadbolt in Oil Rubbed Bronze is a smart door bundle that includes a Wi-Fi smart lock and a deadbolt. Because the deadbolt is part of the bundle, you can lubricate and align the exact bolt paired with the lock, which removes one common source of cold-weather binding.
- Yale | August Wi-Fi Smart Lock with Keypad: Yale | August Wi-Fi Smart Lock with Keypad includes a Yale keypad for code entry and supports auto-lock, auto-unlock, and remote monitoring with the August App. The keypad gives you a backup entry method if the app or phone is slow in cold weather, and you can disable auto-unlock to reduce motor cycles without losing keyless entry.
