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 Best Non-Clay Cat Litters in 2025 – Reviews & Top Picks

Choosing a desirable and effective cat litter can be a daunting task, and when you’re a cat parent, it’s a necessity for your...

Are Geraniums Poisonous to Cats? Vet-Verified Facts & Info

If you’re a cat lover who also loves plants, you already understand the importance of knowing which plants are toxic to your cat....

What a Very Bad Kitty Taught My Family

We are a family of cat people. If not quite cat whisperers, we’ve taught our cats to come when called and stay off...

8 Best Kitten Foods for Sensitive Stomachs in 2025 – Reviews & Top Picks

Some cats have sensitive stomachs. Whether due to genetics or their gut microbiome, some kittens can’t handle the same foods that other cats...

More related

10 Senior Cat Litter Box Solutions: Vet-Approved Tips & Recommendations

As our cats age, it’s important to make small changes around our home to make them more comfortable and their home easily accessible,...

How to Train Your Cat: Vet-Approved Cat Training Guide

Cats have reputations that precede them. Even cats that are incredibly affectionate and what some owners might call “dog-like” can be incredibly headstrong....

Why Is My Elderly Cat Suddenly Pooping on the Floor? 9 Vet-Reviewed Reasons

Our cats are known to be fastidious creatures, and it can be disconcerting when you find your beloved pet pooping on the floor....

What Is a Cat’s Third Eyelid & What if It’s Showing? Vet Approved Advice

Cats have a unique anatomy. For instance, did you know that cats have not one or two eyelids, but three? It’s true! A...

Keep reading

Can Cats Eat Parsley? Vet-Verified Facts & FAQ

Have you ever caught your kitty trying to take a nibble of the plants in your herb garden? While you may be asking yourself if your cat has turned into a vegetarian, the truth is that it is perfectly natural...

Can Cats Eat Parsley

Why Does My Cat Look Out the Window All Day? 5 Vet-Verified Reasons & Care Tips

Does your cat love their window seat? Many cats spend most of their days hanging out by a window to see what’s happening. You might not understand the allure, but you have a fluffy predator on your hands, and it’s...

ginger cat looking at the window

Do Cats Hold Grudges? Vet-Reviewed Feline Behavior & FAQ

Few things are more upsetting to a cat owner than when their pet acts as if they were angry with them after they unintentionally hurt their pet, like stepping on their tail. While hiding under the bed after getting their...

portrait of an emotional angry cat

Can Cats Eat Pesto? Vet-Approved Risks & Safe Alternatives

Pesto is a household staple used in various foods, such as salad dressing, pizza, and chicken—the possibilities are limitless! If you’re a cat owner, you may have noticed your feline nosing around when you bust out this sauce, but is...

Can Cats Eat Pesto

Can Cats Drink Sunflower Oil? Nutritional Facts & FAQ

Cats are incredibly curious creatures that like to poke their noses, tongues, mouths, and paws into anything and everything. An inquisitive cat in the kitchen is a common occurrence for cat owners who cook. It is essential to know if...

Can Cats Drink Sunflower Oil

Can Cats Eat Salami? Vet-Reviewed Risks & Healthy Alternatives

Since cats are carnivores, it may seem like they can enjoy eating different kinds of meat humans consume, such as cured meat. However, whether cats can eat cured meat is a question that isn’t very cut and dry. Although some...

Can Cats Eat Salami

Can Cats Eat Bread? Vet-Approved Facts & FAQ

Bread is a tasty treat that can be served in a variety of ways. During the pandemic, many people began experimenting with making their own bread at home due to shortages at grocery stores and bakeries, as well as to...

Can Cats Eat Bread

Cat Pouncing: Vet-Verified Behavior Explained & Solutions

Cats love to pounce! While it’s a normal activity that’s linked to their hunting skills, there are times when your cat’s pouncing can become a bit too enthusiastic and cross the line into aggression, particularly in indoor cats that don’t...

Burmese cat face before pounce hunting to toy mouse at home