The 5 Best Compost Thermometer : Guide & Review

The temperature of your compost pile is critical. In order to control the Compost Pile Temperature, you should consider buying a Compost Thermometer.

Here is our selection for the Best 5 Compost Thermometer with features and Review. 

What’s Compost Thermometer ?

A compost thermometer is a tool that is used to measure the temperature of compost. It is important to monitor the temperature of compost because it can impact the rate of decomposition and the quality of the compost.

Composting and Temperature

Why you should Monitor Compost’s Temperature ?

Temperature monitoring is very important for managing the composting process.

By measuring temperatures regularly, you can tell how fast the material is composting, and whether there are hot or cold spots in the pile.

Turning the compost whenever temperatures get above or below the optimum range will help produce high-quality compost in the shortest possible time.

The different Temperature by Composting Steps

As organisms decompose waste, they generate heat. Decomposition is most rapid when the temperature is between 90′ and 140′ F (32 – 60′ C).

Below 90′ F (32′ C), the process slows considerably, while above 140′ F (60′ C) most microorganisms cannot survive.

Compost pile temperature depends on how the heat produced by microorganisms is offset by the heat lost through aeration or surface cooling.

When composting high nitrogen wastes, like grass clippings in the summer, smaller piles and frequent turning are needed to both provide oxygen and release excess heat.

Composting Temperature Chart

After an initial high-temperature period (of a few days to several weeks), compost pile temperatures will gradually drop.

Turning the compost rejuvenates the oxygen supply and exposes new surfaces to decomposition, causing temperatures to rise.

When the temperature drops below 70′ F (21′ C), the composting process is nearly complete.

Disavantage of High Temperature on Composting

If temperatures rise above 160′ F (71′ C), the compost can sterilize itself, killing off the beneficial micro-organisms.

Extremely high temperatures can also start the chemical process of spontaneous combustion, which might lead to the outbreak of a fire.

Source: Temperature

Top 5 Compost Thermometer Features & Review

If you are looking to buy a Compost Thermometer consider the following list of the Top-selling Thermometer for your Compost pile

Read also:

1- Cate’s Garden Compost Thermometer

Cate's Garden Compost Thermometer Premium Stainless Steel Bimetal Thermometer for Backyard Composting - 2 Inch Diameter Fahrenheit/Celsius Dial, 20 Inch Temperature Probe

Cate’s Garden Compost Thermometer Premium Stainless Steel Bimetal Thermometer for Backyard Composting – 2 Inch Diameter Fahrenheit/Celsius Dial, 20 Inch Temperature Probe

Cate’s Garden Premium Compost Thermometer lets you know the temperature and health of your compost pile. Simply place the stem into the middle of your pile to get an accurate reading.

As you know, the composting process consists of beneficial microbes breaking down your yard waste and kitchen scraps into fresh, usable soil for your lawn, garden, and flower beds.

With this thermometer, you will know the inner workings of your pile, and correct any problems and imbalances to speed up the soil-making process.

Benefits of Cate’s Garden Compost Thermometer

  • troubleshoot problems to optimize the efficiency of your composter
  • the long stem is great for larger backyard compost piles (4 x 4 feet or more)
  • by knowing the health and heat of your pile, you can increase the speed of converting your kitchen scraps to useable soil
  • track the progress and know when your compost is ready for your garden
  • a great educational tool for kids and students learning nature’s recycling process

2- REOTEMP Backyard Compost Thermometer

REOTEMP Backyard Compost Thermometer - 20" Stem, with PDF Composting Guide (0-200 Fahrenheit)

A REOTEMP FG20P Backyard Compost Thermometer takes the guesswork out of composting.

Features of REOTEMP Backyard Compost Thermometer

  • Accurate & Durable: REOTEMP has been Manufacturing Accurate and Durable Compost Equipment for 20+ Years!
  • Thick 1/4″ Diameter Stem for Higher Durability
  • Hermetically Sealed: Won’t Fog Up. Can be Left in the Compost Pile Overnight
  • Digital Composting PDF Guide: Included to Get You Started
  • Read at a Glance Dial: Fahrenheit with 3 Temperature Zones that Indicate Compost Activity – Steady, Active, and Hot

3- Compost Soil Thermometer by Greenco

Compost Soil Thermometer by Greenco, Stainless Steel, Celsius and Fahrenheit Temperature Dial, 20 inch Stem


Solid 20 inch (508 mm) 0.2 inch (5mm) diameter stem; reinforced welded bolt between dial and stem for long-lasting operation and conditions; high quality 304 stainless steel


Easy to read 2-inch wide dial with color-coded temperature ranges; 40 – 180 Fahrenheit range and -17.77 – 82.22 Celsius in 2-degree increments for accurate readings


High-quality and lightweight PC-coated lens, hermetically sealed to avoid fogging and moisture; IP55 water-resistant rating

4- Stainless Steel Soil Thermometer by Smart Choice

Stainless Steel Soil Thermometer by Smart Choice| 127mm Stem, Easy-to-Read 1.5? Dial Display, 0-220 Degrees Fahrenheit Range | Soil Temperature Thermometer for Ground, Compost, Garden Soil

Use the Stainless Steel Soil Thermometer by Smart Choice to accurately and easily measure soil surface and sub-surface temperatures and determine likely bacterial activity.

It’s the right tool for the job and makes your gardening or composting easier and more rewarding.

Perfect for reading soil temperature and compost temperature, outdoor or indoor garden use, and much more.

Used by professional gardeners and groundskeepers to manage ideal planting and composting.

5- REOTEMP K83W Worm Composting Thermometer

REOTEMP K83W Worm Therm, Worm Composting Thermometer for Red Wiggler Compost Bins with PDF Vermicomposting Guide, 7.5" Stem

Features of REOTEMP K83W Worm Composting Thermometer

  • PDF Vermicomposting Guide Included
  • Waterproof and Dustproof
  • 7.5″ Stainless Steel Stem
  • Highlighted Green Range on the Dial for Red Wiggler Worms

Advantages of Using Compost Thermometer ?

With a basic understanding of the temperature at the center of your compost pile you will know:

  • When to Turn Your Pile
  • When to Add More Material
  • When to Water
  • When Your Compost is Done
  • How to reduce Compost Odors

Basic composting instructions are included on the back of the package to help get you started.

It’s the perfect companion for your compost pile, compost bin, or compost tumbler.

Minimize unpleasant odors from your compost pile: This can be a concern in urban and suburban areas with small lots and neighbors living close by.

How to Reduce Compost’s Ordors ?

Odors can be reduced, or eliminated, by following two practices:

  • first, remember to not put bones or meat scraps into the compost;
  • second, cover new additions to the compost pile with dry grass clippings or similar mulch. Adding lime or calcium will also neutralize odors.

If the compost smells like ammonia, add carbon-rich elements such as straw, peat moss or dried leaves.