An atomic wall clock with an outdoor sensor gives you the time and a quick look at conditions inside and outside, all in one place. The best fit depends on where you’ll hang it, how far away you need to read it, and how much room you have for the clock and sensor. These five picks range from compact displays to a jumbo model built to be seen across a large room.
Table of Contents
Quick Comparison
| Product | Display size | Outdoor sensor range | Notable features | Best for |
|---|---|---|---|---|
| WallarGe 8.5-Inch Digital Atomic Clock | 8.5-inch clock | Up to 330 feet | Alarm, auto DST, day and date | Smaller rooms and everyday use |
| WallarGe 14.5-Inch Atomic Clock | 14.5-inch frame; 8.4-inch time numbers | Up to 330 feet | Wall or desk placement, day and date | Large rooms and long-distance viewing |
| WallarGe 12.5-Inch Self-Setting Clock | 12.5-inch clock; 2.5-inch time display | Up to 100 feet | Alarm, four time zones, Fahrenheit or Celsius | Flexible wall or desk use |
| Sharp Atomic Clock with 4-Inch Display | 4-inch-tall time display | Up to 100 feet | Indoor and outdoor temperature, calendar | Big, simple time display |
| Sharp Atomic Digital Wall Clock with 3-Inch Display | 3-inch time display | Up to 100 feet | Weekday, calendar, auto DST, tabletop stand | A compact all-in-one display |
Our Picks: Best Atomic Wall Clock With Indoor Outdoor Temperature reviews
1. WallarGe 8.5-Inch Digital Atomic Clock: Best Compact Pick
This WallarGe model packs time, indoor and outdoor temperature, day, and date into an 8.5-inch digital clock. Its built-in receiver is designed to sync with the WWVB broadcast, while the included wireless sensor sends outdoor temperature readings to the main unit from up to 330 feet away.
The display also includes seconds, an alarm, four time-zone choices, and an automatic daylight saving time setting. You can switch between 12- and 24-hour time and Fahrenheit or Celsius. The clock and sensor run on separate batteries, which are not included. The clock uses three AAA batteries; the sensor uses two AA batteries.
Its smaller footprint makes it easier to fit in a kitchen, office, or bedroom than the jumbo models. The trade-off is that its display is not as large as the Sharp clocks or the 14.5-inch WallarGe. This model has no backlight, so consider how much ambient light the room gets before choosing a dark spot.
Pros:
- Shows indoor and outdoor temperature alongside time and calendar information
- Longer stated sensor range than the other picks
- Includes an alarm, auto DST, and four time zones
- Switches between Fahrenheit and Celsius
Cons:
- No backlight for viewing in a dark room
- Batteries are not included
Verdict: Choose this model if you want a feature-rich clock that takes up less wall space and the absence of a backlight won’t be an issue.
2. WallarGe 14.5-Inch Atomic Clock: Best for Large Rooms
The standout feature here is size. This 14.5-inch clock has a 12.8-by-4.9-inch LCD screen and time numbers listed as 8.4 by 3.1 inches, making it easier to read from across a spacious room. It displays the time, seconds, day, date, and indoor and outdoor temperatures.
The outdoor sensor has a stated range of up to 330 feet, and the clock can be mounted on a wall or set on a desk using its fold-out stand. It also includes a mounting ruler to help position wall holes. The clock takes four AA batteries and the sensor takes two AA batteries; neither set is included.
Owners often appreciate the clear, large display and the choice of wall or tabletop placement. Signal reception can depend on where the clock is placed, however, and this model has no backlight. Its size is a strength in a gym, classroom, or large living area, but it may feel oversized in a small room.
Pros:
- Large screen and time numbers suit long-distance viewing
- Displays indoor and outdoor temperature, time, day, and date
- Can be wall-mounted or used on a desk
- Includes a mounting ruler for positioning wall holes
Cons:
- No backlight for dark spaces
- Uses six AA batteries in total, which are not included
Verdict: This is the strongest choice when visibility across a large room matters more than a compact design.
3. WallarGe 12.5-Inch Self-Setting Clock: Best for Flexible Placement
This 12.5-inch WallarGe clock is a middle ground between the compact model and the jumbo pick. Its 2.5-inch time display is intended to be easy to read around a home or office, and the screen also shows indoor and outdoor temperatures, seconds, day, and date. The clock is designed to receive daily WWVB time updates and can also be set manually.
You can hang it on a wall or place it on a desk. Other features include an alarm, four time-zone settings, automatic daylight saving time, and Fahrenheit or Celsius temperature display. The wireless outdoor sensor should be placed within 100 feet of the clock. Both units are battery-powered, and batteries are not included.
Owners often find the numbers easy to see and the setup straightforward. Compared with the 14.5-inch WallarGe, it takes up less space, but its stated sensor range is shorter. Like the other WallarGe models here, it has no backlight, so it is better suited to a room where the display gets some light.
Pros:
- Wall-mount and desk placement options
- Includes an alarm, four time zones, and auto DST
- Displays indoor and outdoor temperatures in either Fahrenheit or Celsius
- Useful balance of display size and room footprint
Cons:
- Outdoor sensor range is shorter than the 330-foot WallarGe models
- No backlight; batteries are not included
Verdict: Pick this one if you want a mid-size atomic clock with an alarm and flexible placement, and your sensor can stay within 100 feet.
4. Sharp Atomic Clock with 4-Inch Display: Best for Big, Simple Numbers
This Sharp clock keeps the display focused on useful everyday information: time, seconds, indoor and outdoor temperature, calendar, and day of the week. Its time numbers are four inches tall, and the atomic receiver is designed to sync with the WWVB broadcast. An integrated stand allows tabletop use, while the clock can also be mounted on a wall.
The included wireless sensor sends outdoor temperature readings from up to 100 feet away. The main unit takes four AA batteries and the sensor takes two AAA batteries; batteries are not included. Its simpler feature set may suit you if a large time display and temperature readings matter more than an alarm or extra time-zone options.
Signal reception is an important placement consideration with any atomic clock. Some owners have found that moving the unit to a different spot helps it receive the time signal. If the clock is in a location with weak reception, you may need to try another position. This Sharp model offers a larger time display than the 3-inch Sharp, but the 4-inch numbers and overall unit may take up more space.
Pros:
- Four-inch-tall time numbers are easy to see from a distance
- Shows indoor and outdoor temperature, day, and calendar information
- Can sit on a desk or hang on a wall
- Wireless sensor avoids running a cable outdoors
Cons:
- Sensor range is up to 100 feet
- No alarm feature
Verdict: Choose this Sharp if you want a large, uncluttered time display with indoor and outdoor temperature readings and don’t need an alarm.
5. Sharp Atomic Digital Wall Clock with 3-Inch Display: Best Compact Sharp Pick
This Sharp model combines a 3-inch time display with a wireless outdoor sensor and an indoor temperature reading. The display also includes the weekday and calendar information, giving you a quick overview without needing separate devices. Its atomic receiver is designed to set the time automatically, and the listing includes automatic daylight saving time.
The clock can be wall-mounted or placed on a tabletop stand. Its sensor has a stated range of up to 100 feet. The main unit takes three AA batteries and the sensor takes two AAA batteries, which are not included.
Owners often value the large, readable numbers and the convenient temperature display. The 3-inch digits are smaller than the 4-inch display on the other Sharp pick, so consider how far away you’ll be when checking the time. As with other radio-controlled clocks, reception may vary with placement; a weak signal can affect automatic time setting.
Pros:
- Combines time, weekday, calendar, and indoor/outdoor temperature
- Wall-mount and tabletop options
- Includes automatic daylight saving time
- Uses fewer batteries in the clock than the other Sharp pick
Cons:
- Three-inch numbers are smaller than the other Sharp model’s display
- Sensor range is up to 100 feet; batteries are not included
Verdict: This is a good fit if you want Sharp’s temperature-and-calendar features in a display that is less oversized than the 4-inch model.
How to Choose an Atomic Wall Clock with Indoor and Outdoor Temperature
Choose a display you can read from your usual viewing distance
Look at the size of the time numbers, not just the clock’s overall width. A large display can be helpful in an open living area, classroom, or office, while a smaller unit may suit a kitchen or bedroom wall. The 14.5-inch WallarGe has the largest listed time numbers in this group; the Sharp models offer 4-inch and 3-inch time displays.
Check the sensor range and where it will sit
Measure the distance between the clock and the spot where you want to place the outdoor sensor. The two larger-range WallarGe models list a range of up to 330 feet, while the other three picks list up to 100 feet. Range figures are maximum stated distances, so walls and placement may affect whether the sensor communicates reliably. For the 8.5-inch WallarGe, the supplied information also advises keeping the sensor out of direct sunlight and rain.
Plan for atomic signal reception
An atomic clock uses a radio receiver to sync with the WWVB broadcast. Where you put the clock can affect how well it receives that signal. If it does not set itself at first, try another location and allow it time to receive an update. The WallarGe models also offer manual setting according to their product details, which can be useful if automatic reception is difficult where you plan to use the clock.
Decide which extra display features you need
All five picks show indoor and outdoor temperature, but other functions vary. The WallarGe 8.5-inch and 12.5-inch models include an alarm, while the 14.5-inch model and both Sharp picks focus on at-a-glance time and environmental information. If you want 12- or 24-hour time, a choice of time zones, or Fahrenheit and Celsius switching, check the individual model’s feature list before buying.
Compare mounting options and available space
Some of these clocks can be used on a wall or a desk. The WallarGe 14.5-inch model includes a fold-out stand and a mounting ruler, while the 12.5-inch WallarGe and the Sharp 4-inch model also list wall and tabletop use. Check the unit’s dimensions against your intended spot, especially if you’re considering a jumbo display.
Remember the batteries and lighting
These clocks and sensors are battery-powered, and the listed batteries are not included. Check the required battery types before setup: some models use AA batteries in both units, while others combine AA and AAA batteries. The three WallarGe models explicitly state that they have no backlight, so think about whether the clock will be readable in the lighting conditions of your room.
Frequently Asked Questions
How does an atomic wall clock set itself?
These clocks use a built-in receiver to pick up the WWVB radio broadcast and update the displayed time. Reception can vary depending on the clock’s location, so it may take some placement adjustments to receive a signal.
Does the outdoor temperature sensor need a wire?
No. Each product listed here uses a wireless outdoor sensor to send temperature information to the clock. The sensor still needs batteries, and it should stay within the stated range for its model.
How far away can I place the outdoor sensor?
The two WallarGe models with the longest stated range list up to 330 feet. The other WallarGe model and both Sharp clocks list up to 100 feet. Actual communication may depend on placement and obstacles between the sensor and clock.
Do these clocks have a backlight?
The supplied product details specifically say that the three WallarGe clocks have no backlight. Backlight information is not provided for the two Sharp models, so check the product listing if nighttime visibility is important to you.
Can I use one of these clocks on a desk instead of a wall?
Several models offer both wall and tabletop placement. The 14.5-inch WallarGe has a fold-out stand, and the 12.5-inch WallarGe and Sharp 4-inch model also list wall or desk use. Check the listing for the specific model you choose.
Do the clocks include batteries?
No. The product details state that batteries are not included. Battery types and quantities differ by model, so check the requirements before setting up the clock and sensor.
Final Recommendation
For the best balance of features and placement flexibility, the WallarGe 12.5-inch clock is a strong all-around choice: it includes an alarm, indoor and outdoor temperature, and wall or desk placement. If visibility across a large room is your priority, choose the 14.5-inch WallarGe. For a large time display with a simpler feature set, consider the Sharp 4-inch model. Before deciding, confirm the sensor distance, battery requirements, and whether the display will suit the lighting and size of your room.
