The Sims 4 Seasons: complete guide to the Seasons pack

Released in June 2018, the The Sims 4 Seasons expansion remains one of the game's most essential packs. It finally brings what the community had been asking for since launch: a seasonal cycle, dynamic weather, and a holiday calendar that shapes the rhythm of your Sims' lives. Snow, rain, heatwaves, dead leaves, sudden storms… the neighborhood changes its look every few days and your little characters have to adapt, pull out their coats, tidy up the garden, or set up the Christmas tree. Here's our complete guide to getting the most out of the pack, customizing the calendar, and keeping your vegetable garden thriving all year round.

The four-season cycle

Once the pack is installed, your world adopts a spring → summer → autumn → winter cycle, with each season lasting seven in-game days by default. However, you can adjust this duration in the options: 7, 14, or 28 days per season, depending on whether you prefer a fast pace or long-term immersion. Each season has its own visual atmosphere and color palette: buds and showers in spring, blazing blue skies in summer, a carpet of russet leaves in autumn, and a white coat with short days in winter.

This cycle affects everything: vegetation, wildlife (butterflies in spring, fireflies in summer), the outfits worn by NPCs, random neighborhood events, and of course, the holiday calendar. Each lot also reacts differently: a lawn covered in snow will need shoveling, while a garden in a heatwave will need constant watering.

Dynamic weather: rain, storms, snow, and heatwaves

This is the heart of the pack. The Sims 4 Seasons introduces ever-changing weather that goes far beyond mere scenery. Spring showers form puddles that kids love jumping in, summer storms can literally strike your Sims with lightning, snow falls thick enough to settle on the ground and let you build snowmen, and summer heatwaves push the temperature up to the point of putting your characters in danger.

Each type of weather brings its own interactions: jumping in puddles, dancing in the rain, ice skating on a frozen lake, sunbathing, cooling off with a water balloon, or melting a pool float. A thermometer built into the interface constantly shows the outdoor temperature, from freezing to scorching, and an icon warns of your Sim's thermal discomfort.

Tip: install a thermostat indoors to heat or cool your home, but keep an eye on the electricity bill: it climbs fast during a heatwave or the depths of winter.

Thermal protection: dress your Sims to survive

The big gameplay novelty is the concept of body temperature. A Sim exposed too long to the cold in a t-shirt will catch hypothermia, while a Sim in a thick sweater under 104°F risks heatstroke. Both extremes can be deadly if you don't react in time.

To avoid these tragedies, CAS now includes two new outfit categories:

• Warm outfit (winter): coats, beanies, scarves, gloves, and fur-lined boots;
• Cool outfit (summer): shorts, light dresses, sandals, swimsuits.

The game automatically switches to these outfits when a Sim goes out in extreme weather, provided you've created them. So take a few minutes in Create a Sim to put together a full wardrobe: it's the best way to avoid surprises. If your Sim gets too cold, hot chocolate or a hot bath will raise their temperature; if they're overheating, a cold shower, ice cream, or a water balloon will bring the thermometer back down.

Seasonal activities

Each season unlocks its own set of exclusive activities, which complement the base gameplay:

• Spring: gardening in full swing, scout camp for children and teens, outdoor weddings under the cherry trees, butterflies to catch with a net.
• Summer: swimming in pools and lakes, water games with balloons and water guns, sunbathing, firefly hunting, picnics;
• Fall: raking leaves then jumping into the piles, honey harvesting with beehives, gathering, fireside evenings;
• Winter: snowball fights, customizable snowman, ice skating, decorating the tree, hot drinks with family.

Some of these activities unlock powerful positive moodlets that will help your Sims progress in their careers or aspirations.

Holidays built into the calendar

The calendar, accessible via the icon at the bottom left of the interface, shows the days, the forecasted weather and the upcoming holidays. Four major holidays are set up by default:

• Winterfest (Christmas equivalent): a tree to decorate, gift exchanges, a visit from Father Winter who hands out presents to well-behaved children.
• New Year's Eve: a midnight celebration, resolutions, fireworks.
• Love Day (Valentine's Day): romantic atmosphere, gifts between lovers, a "Cupid" spirit that encourages confessions and flirting.
• Harvestfest (Thanksgiving equivalent): a big family meal, decorations, a spirit of gratitude and, above all, the famous holiday gnomes.

The Harvestfest gnomes are a mini-game all their own: they appear randomly on your lot during the holiday and wait to be given what they're asking for (food, a gift, a hug, a prank…). A happy gnome brings good luck to the family; an upset gnome starts trashing crops and breaking objects. If managed well, they grant a very handy harvest buff.

Tip: when a gnome appears, click on it to read its mood before acting. Each gnome asks for one specific thing and transforms depending on your choice: a vengeful flame gnome can literally set your house on fire.

Other packs add their own holidays to the calendar (including the Pranks and cosmic events introduced by more recent updates), and you can toggle each one on or off individually.

Customizing the calendar and creating your own holidays

This is one of the pack's greatest strengths: you don't have to settle for the default holidays. By opening the calendar and clicking "Add Holiday," you can create your own holiday with:

1. A custom name and icon;
2. A decorative theme (objects set with this theme automatically appear as decor);
3. Up to five traditions from a long list: big meal, gift-giving, romantic spirit, costumes, fireworks, meditation, pranks, gardening, singing…;
4. The recurrence date and whether it's a day off (do Sims stay home?).

Each tradition completed during the day generates satisfaction points and an extended positive moodlet. Conversely, ignoring an important holiday penalizes the household's mood. Nothing stops you from inventing a "Garden Festival" in the middle of summer, a wedding anniversary, a beer festival, or a neighbors' party: the calendar is fully customizable.

The Gardener career and the Floral Arranging skill

The Sims 4 Seasons introduces a Gardener career open to adults, with two branches starting at level 6:

• Botanist: the scientific path, writing papers, analyzing rare plants, research grants and academic recognition.
• Floral Designer: the creative path, creating bouquets on the flower arranging table and making deliveries around the neighborhood.

The Designer career relies on the new Flower Arranging skill, which goes up to level 10 on a dedicated table. As they progress, your Sims unlock bouquets with special effects: aphrodisiac bouquet, calming bouquet, electrifying bouquet… perfect for flirting, negotiating a promotion, or simply decorating the house.

Alongside this, the pack adds the Scout career for children and teens: five levels, badges to unlock, and group outings that fill up young Sims' schedules quite nicely.

Tips for a garden that produces year-round

The pack introduces a crucial concept for gardeners: every plant has its preferred season. Outside of that season, it goes dormant and stops producing fruits, vegetables, or flowers. Here are a few rules for keeping a profitable garden:

• Plan your crops: mix spring, summer, and fall species so you always have something to harvest.
• Build a greenhouse: a fully glassed-in, heated or air-conditioned room protects plants from the seasons and lets them produce continuously. Be careful, growth is slower there, so save the greenhouse for your most valuable plants.
• Fertilize regularly: every plant needs to be fertilized several times before evolving into its higher-quality version; use fish, compost, or better fertilizers to speed up quality growth.
• Graft to multiply: grafting lets you combine two species on the same plant, ideal for saving space and unlocking rare plants.
• Plan ahead for snow: in winter, go out and cover your outdoor plants, or expect to see them come to a complete standstill.

Good to know: the weather machine, unlockable at the end of the Gardener career or purchasable in the late game, lets you trigger a storm, snowfall, or sunshine on demand: essential for forcing a season on a given lot.

Going further

• Our complete gardening guide for The Sims 4: levels, rare grafts, and hidden plants.
• An overview of packs to pair with Seasons to multiply the celebrations: Island Living, Cottage Living, Snowy Escape.
• All the weather and calendar cheat codes to quickly test your custom season ideas.

With Seasons, The Sims 4 finally gains the life it was missing at launch. Weather, calendar, and celebrations turn the neighborhood routine into a truly living year — and once you've experienced it, it's hard to go back.