Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Do Cats’ Weights Fluctuate With the Seasons? Vet Approved Facts & Care Tips

Siberian domestic cat sitting in snow during wintertime

If you have been a cat owner for several years, you may have noticed your pet occasionally but regularly looking heavier or thinner, and many people wonder if it has to do with the time of year. The short answer is that yes, a cat’s weight can fluctuate with the seasons.

Here, we provide several reasons that your cat’s weight can vary from one season to the next and give you tips on helping your pet maintain an ideal weight so they can be happy and healthy.

divider 3 paws

Cats Know the Time of Year

Winter

During the winter months, cats tend to get less exercise, especially if they like to go outside. The cold weather will keep them indoors more often, and much of the activity that they would get playing and hunting will need to wait for spring, which can lead to weight gain in some cats. Even indoor cats may move less in winter due to the reduced hours of sunlight and cooler temperatures. They might also be less active because you are less active in winter, as many people like to snuggle on the couch and watch TV when it’s too cold to be outdoors.

Snowshoe Cat inside in winter with fairy lights
Image Credit: Misha Leng, Shutterstock

Summer

Many cats naturally get more active as the weather warms up. Cats that go outside will spend much of the day hunting and chasing things, and even indoor cats can spend time stalking wildlife through the windows or from the porch, which will keep them active and burning calories. Many cat owners notice their pets sleeping far less in order to get back into the action, and we humans also tend to stay busier, which might also help keep our pets from spending the day sleeping, as they must often be underfoot to see what you are doing. With the added activity during the summer months, your pet will likely shed weight and appear a bit thinner.

divider 3 paws

Cats Have a Winter Coat

Most cats naturally develop a winter coat each year, which helps protect them from the colder temperatures. You might not notice it just by glancing at your cat because it’s the thick undercoat that they get more of. However, it can give your cat a fuller appearance, which can make you think that they put on a few pounds. In contrast, this undercoat will thin out significantly as the summer approaches, which can make them look thinner and even more muscular. Outdoor cats will often experience a bigger change in coat density from season to season, but indoor cats will also change slightly.

Your Cats’ Diet

One thing that can cause your cat to gain a bit of weight in the winter is their diet. Many cat owners might not know that as it gets cold and your pet spends more time inside sleeping, it can be a good idea to cut back on the number of calories that they are eating, especially in the treat department, since it will be harder for them to burn it off. That said, it can be hard to determine how much to reduce safely, so consult with a vet before making any dramatic changes.

Need veterinary advice but can't get to the clinic? Catster recommends PangoVet, our online veterinary service. Talk to a vet online and get the answers and advice you need for your cat without having to leave your living room — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money

Normal Versus Concerning Weight Changes

While your cat might look different from summer to winter and there may be slight weight changes, anything more than a pound’s difference in either direction calls for an examination by a veterinarian. Significant or rapid weight changes are often a sign of an underlying health problem.

divider cats oct 2024

Tips for Maintaining a Cat’s Weight

  • Regular vet visits will help you monitor your pet’s weight and learn about any potential health problems early.
  • Feed your pet a high-quality commercial cat food with real meat like chicken or turkey listed as the first ingredient. You also want to choose a brand that’s right for your pet’s age, weight, and health condition. If you are not sure what to feed your pet, talk it over with your vet.
  • Establish a feeding schedule to have better control over your pet’s portion size, if your cat is prone to overeating.
  • Limit treats to no more than 10% of your cat’s total daily caloric intake. To find out your cats recommended daily calories, we suggest using a calorie calculator like the one below.
  • Resist sharing human food with your pet, as it may contain dangerous ingredients and can lead to weight gain.
  • Try to maintain a consistent amount of activity throughout the year. Regularly scheduled playtimes can get your cat into a routine that helps them maintain an ideal body weight year round.

The exact amount of calories an individual animal needs to maintain a healthy weight is variable and influenced by many factors including genetics, age, breed, and activity level. This tool is meant to be used only as a guideline for healthy individuals and does not substitute veterinary advice 

divider cat paws 2 oct 2024

Frequently Asked Questions

Can Outdoor Cats Shed More Weight Than Indoor Cats?

The seasonal weight fluctuations of an outdoor cat may be more significant than those of an indoor cat because the outdoor cat can get significantly more activity as they hunt and escape dangers. The reduced activity during the winter will also be more dramatic.

Why Does My Cat Eat Less in the Summer?

Some cats will eat less in the summer, and it can be due to the warmer temperatures affecting their appetite, or they may be too busy having fun. However, if you start to notice significant weight loss, it’s best to consult with a vet to rule out any underlying health problems.

How Much Seasonal Weight Change Is Normal?

Your cat’s weight should fluctuate only slightly, especially if they stay indoors. It’s best to discuss any significant change of more than a few pounds with a veterinarian.

What Should I Do If My Cat Doesn’t Lose Their Winter Weight?

If your cat puts weight on in the winter and doesn’t lose it in the summer, it’s a good idea to contact a veterinarian about the proper steps that you can take to help them burn it off, which could mean more activity, modifications to their diet, or both.

divider 2 cats

Summary

Your cat’s weight can fluctuate a bit from season to season, and they will usually be slightly heavier in the winter than they are in the summer, with outdoor cats experiencing a more dramatic change. Reasons likely included changes in activity leading to caloric imbalances. Besides the actual weight gain, cats will often get a winter coat that can fill out their appearance, making them look heavier. However, if you notice a sudden weight change in your cat at any time of the year that is more than a pound, it’s a good idea to schedule an appointment with a vet to rule out any underlying health problems.


Featured Image Credit: Dmitry Naumov, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

10 Top Cat Cafes in the US in 2025

Cat cafes are wonderful establishments that promote cat adoption and animal advocacy. They host and house adoptable cats and provide a safe environment...

Can You Use Dog Shampoo on Cats? Grooming Advice & Vet-Approved Safety Tips

If you have a multi-pet household, you might wonder if you can kill two birds with one stone by using your dog’s shampoo...

Adopt A Less Adoptable Pet Week: When Is It & How To Celebrate

Animal shelters are overrun. Backyard breeding is at an all-time high. Some people fail to fix their pets, others abandon them, and some...

Baker and Taylor Were Library Cats and Accidental Celebrities

In the 1980s, two small-town library cats named Baker and Taylor became some of the most famous felines in the world after they...

More related

How Do Cats Know to Use the Litter Box? Vet-Verified Facts & Useful Tips

Have you ever considered how cats seem to instinctively know where to go when nature calls, while dogs often require dozens of potty-training...

Can Cats Eat Banana Bread? Vet-Approved Facts & FAQ

There are precautions we need to take when sharing tasty treats with our feline friends. Sometimes, our food is a healthy snack, and...

Does Baby Powder Kill Fleas on Cats? Vet-Reviewed Facts & Safety Explored

Fleas are cats’ most common skin parasite. They not only cause skin problems but can also transmit diseases to you and your cat....

Why Do Cats Stare? Feline Behavior Explained (Vet-Reviewed Info)

If you’ve ever watched your cat mesmerized for minutes or longer by a seemingly random object, you’re not alone. Since time immemorial, humans...

Keep reading

Can Cats Eat Lychee? Vet-Reviewed Nutritional Facts & FAQ

Cats are obligate carnivores, so they need little more than animal protein to stay happy and healthy throughout their lives. However, this is not to say that eating some safe plant material is detrimental to cats. Cats can indeed consume...

Can Cats Eat Lychee

Can Cats Eat Brussels Sprouts? Vet-Approved Diet Facts & FAQ

Cats are obligate carnivores, and their main source of nutrition comes from eating meat. You might be tempted to feed your cats greens every once in a while because greens can supplement their diet with vitamins and minerals that you...

Can Cats Eat Brussels Sprouts

Is Vanilla Essential Oil Safe for Cats? Vet-Approved Facts & FAQ

Essential oils come from extracting oils from certain plants and flowers, and vanilla essential oils come from fermented vanilla beans. You can use vanilla essential oils for many things, such as flavoring agents in foods and beverages, in oil diffusers...

Catster_Is Vanilla Essential Oil Safe for Cats

5 Amazing DIY Cat Diapers You Can Create at Home (With Pictures)

If you are a cat lover, then you know that sometimes they have accidents. When this happens, it is important to have a plan in place to deal with the mess. One option is to use cat diapers. Cat diapers...

cat wearing diaper

Do Cats Get Annoyed? 10 Vet-Reviewed Signs & What to Avoid

Cats can get annoyed just like humans, although they usually express it differently than us. Even the most loving and content feline can experience annoyance. It is one of the many emotions cats can feel. A cat will show clear...

An annoyed cat or angry cat with a ball toy.

Can Cats Eat Pecans? Vet-Approved Facts & FAQ

Cat owners around the world know that they must be careful about where they leave food lying around. Felines can jump up onto benches and shelves to reach food items that have been left out and, in some cases, even...

Can Cats Eat Pecans

Cat Humping: Reasons They Do It, Prevention, Facts & FAQ

Dog owners are usually embarrassingly familiar with the sight of their pets humping other pups, objects, or people. If you have a cat, you probably never expected to deal with this behavior, but do cats hump as well? Yes, cats...

cat-humping

E. Coli Infection in Cats: Vet Approved Signs, Causes & Care

E. coli, or Escherichia coli, is a bacterium that sits in most living mammals’ digestive tracts. It can be found in human and animal urine and feces. It’s usually a commensal organism, part of the normal bacterial flora of the...

sick orange cat