Best Atomic Alarm Clocks

7 Best Atomic Alarm Clocks in 2020

Updated: October 30, 2020

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Atomic clocks are a type of clocks that measures the time with the help of atoms' resonance frequencies. They synchronize themselves automatically using radio frequencies, which limit any errors that could arise using them.

Before checking the best atomic alarm clocks that we've reviewed here, it is good to know that most of the best rated atomic clocks available on the market use radio frequencies broadcast from NIST-F1, NIST's atomic clock in Colorado. Therefore, they only function in North America.

Best Atomic Alarm Clocks

Hito Atomic Alarm Clock

Editor's Choice:

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Marathon Atomic Travel Alarm Clock

Best Small Atomic Clock:

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AcuRite Atomic Alarm Clock

Best Atomic Dual Alarm Clock:

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Sharp Atomic Alarm Clock

Best Atomic Desk Clock:

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Newentor Projection Alarm Clock with Weather Station

Best Atomic Clock with Weather Station:

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La Crosse Atomic Alarm Clock

Best Atomic Clock with Indoor Outdoor Temperature:

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QUIGO Atomic Clock

Best Atomic Kids Alarm Clock:

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Hito Atomic Alarm Clock

Editor's Choice

Hito Atomic Alarm Clock Hito Atomic Alarm Clock Pixel

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The Hito Atomic Alarm Clock separates itself from its accurate brethren by offering more than just timekeeping. In addition to keeping time accurately, it can also display temperature and supports up to four United States timezones.

This self-setting alarm clock also has a bright and clear display, with a smart auto nightlight feature. Basically, what happens is that, when it's dark, a light sensor activates the soft ambient backlight of the atomic alarm clock. This allows you to see what's displayed even if it's dark. But, if you feel like it's too bright for you, you can always turn it off via a switch in the battery compartment.

Product features:

  • Supports four timezones - Pacific, Mountain, Central, and Eastern
  • 3.8 inch LCD display with indoor temperature and calendar
  • Dimmable smart auto nightlight
  • Battery operated (two AAA)

What we like:

  • Very accurate
  • User-friendly

What we don't like:

  • Drains battery quickly

Marathon Atomic Travel Alarm Clock

Best Small Atomic Clock

Marathon Atomic Travel Alarm Clock Marathon Atomic Travel Alarm Clock Pixel

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The Marathon Atomic Travel Alarm Clock fits the bill perfectly for people who move around a lot.

With support for up to six main timezones in the United States and a pocket-friendly size, this auto set alarm clock with temperature display will guarantee that you'll always be on time for your appointments wherever you are. Plus, it supports multiple languages as well, which might come in handy if you're around a lot.

This atomic travel alarm clock supports displaying time in both 12-hour and 24-hour formats. It also has a built-in light sensor.

Product features:

  • Supports six timezones - Pacific, Mountain, Central, Eastern, Atlantic & Newfoundland
  • Supports five languages - English, French, German, Spanish, and Italian
  • Compact and travel-friendly size
  • Easy-to-clean acrylic display
  • Built-in light sensor
  • Battery operated (two AA)

What we like:

  • Portable
  • Folding stand

What we don't like:

  • The alarm is not loud

AcuRite Atomic Alarm Clock

Best Atomic Dual Alarm Clock

AcuRite Atomic Alarm Clock AcuRite Atomic Alarm Clock Pixel

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Known for its weather monitoring products, the Acurite Atomic Alarm Clock is a useful little tool. It is accurate and self-adjusting to DST, and it comes with a dual alarm function. Additionally, this atomic digital alarm clock can monitor the indoor temperature and display the date to help you keep track of time better. All of these features are encased in a stylish timepiece that comes with a backup battery and USB charging function.

Product features:

  • Phone charging atomic alarm clock with dual alarm
  • Automatically adjusts to DST
  • Adjustable brightness
  • LCD screen with indoor temperature and calendar
  • Outlet powered with battery back up (three AA)

What we like:

  • Offers dual alarm

What we don't like:

  • Buttons feel cheap

Sharp Atomic Alarm Clock

Best Atomic Desk Clock

Sharp Atomic Alarm Clock Sharp Atomic Alarm Clock Pixel

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It goes without saying that Sharp knows how to design great home appliance products simply for better living. What's good about Sharp's wall-mountable atomic alarm clock is that you can put it on top of your nightstand and mount it on your walls. It can display the time and date accurately, as well as the indoor temperature. The atomic bedside clock also comes with an on-demand backlight function and a conveniently located snooze button.

Product features:

  • LCD screen with indoor temperature and calendar
  • Wall-mountable
  • Backlight function
  • Battery-powered (three AAA)

What we like:

  • Easy to use
  • Compact

What we don't like:

  • The initial setup is not user-friendly

Newentor Projection Alarm Clock with Weather Station

Best Atomic Clock with Weather Station

Newentor Projection Alarm Clock with Weather Station Newentor Projection Alarm Clock with Weather Station Pixel

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The Newentor Atomic Projection Alarm Clock with Weather Station separates itself from other atomic alarm clocks with various added functions. It's capable of displaying both indoor and outdoor temperature, as well as the date or calendar, and the humidity. It can also project the time and the temperature via a soft red light on the walls and ceiling.

The brightness of the screen of this atomic clock radio can be adjusted. It also displays six different vivid weather symbols indicating the weather. Other notable features of this alarm clock include a dual alarm and snooze function.

Product features:

  • Dual-alarm with snooze
  • Time and temperature projection
  • Indoor and outdoor temperature with humidity display
  • Outlet powered

What we like:

  • Sleek design
  • Great projection

What we don't like:

  • No battery backup

La Crosse Atomic Alarm Clock

Best Atomic Clock with Indoor Outdoor Temperature

La Crosse Atomic Alarm Clock La Crosse Atomic Alarm Clock Pixel

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The La Crosse Atomic Alarm Clock is one of the best atomic alarm clocks for the elderly. This is because of its large and easy-to-read display. Each digit measures a little over two inches. This makes it easy to tell the time, even from afar. It can also be placed on top of tables or hung on walls.

This atomic alarm clock radio with battery backup is also capable of monitoring both indoor and outdoor temperatures.

Product features:

  • Large 2.125-inch digits with a calendar display
  • Monitors indoor and outdoor temperature
  • Wall hanging or freestanding
  • Outlet powered with battery backup (two AA)

What we like:

  • Affordable
  • Large digit displays

What we don't like:

  • Too bright even at its lowest setting

QUIGO Atomic Clock

Best Atomic Kids Alarm Clock

QUIGO Atomic Clock QUIGO Atomic Clock Pixel

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Atomic alarm clocks are often designed for adults or seniors. The QUIGO Atomic Clock is different as it's marketed towards kids.

It has a big display that kids can use to learn how to tell the time. Plus, it has a compact and robust design. This means that it's more likely to survive its fair share of falls and bumps.

The atomic clock can display time and the date, week, and temperature as well. It is battery-powered via single AA battery and comes with an adjustable backlight that lasts for around five seconds in the dark.

Product features:

  • LCD screen with large digits
  • Displays indoor temperature, date, and week
  • Supports four timezones - Eastern, Central, Mountain, Pacific
  • Battery-powered (single AA)

What we like:

  • Available in multiple colors
  • Large digit displays

What we don't like:

  • The setup is not user-friendly

Atomic Alarm Clocks - Buyer's Guide

Accurate, elegant, and often with added functions, atomic alarm clocks are among the best timekeeping devices out there. While the market does not offer so many atomic alarm clocks, you should still consider many things before making your final decision.

Here we have compiled a list of the features you should consider when selecting the best atomic clock for you.

Supported timezones

Although some people think that atomic alarm clocks work like satellite alarm clocks, they don't. Atomic alarm clocks use radio frequencies broadcast from nationwide atomic clocks. For instance, in the USA, most digital atomic alarm clocks use the broadcast from NIST's Colorado Atomic Clock, and they cannot function outside North America. As a result, to avoid surprises, you should definitely check which time zones the alarm clock of your choice supports.

That being said, the best atomic alarm clock that supports the most time zones is the Marathon Alarm Clock that supports six time zones.

Language

As the atomic clocks are also great for traveling, some of them, like the Marathon Alarm Clock, offer multiple languages. If you consider them a gift for someone living outside the US, this feature is good to have.

Screen

Alarm clocks should be readable. They should have large, readable numbers and adjustable brightness.

Final Thoughts

Atomic clocks are the most accurate clocks out there. They're automatic alarm clocks synchronized using radio frequencies, usually to the broadcasts from NIST's Colorado Atomic Clock. Because of this, there's very little room for error. In fact, the best atomic alarm clocks have an error rate of 1 second in up to 1 million years.

If you are traveling a lot, having the best atomic alarm clock by your side can be great to have as they synchronize themselves automatically to the precise time and adjust for DST. But, before making a final decision about your auto time set alarm clock, do in-depth research about your atomic alarm clock candidate's supported time zones and languages.

We hope that our atomic alarm clock reviews will help you make a perfect choice for your needs.

What is the best atomic alarm clock?

If you are still asking what the best atomic alarm clock is, then we recommend the Hito Atomic Alarm Clock, one of the most accurate atomic alarm clocks available on the market.