From Bulbapedia, the community-driven Pokémon encyclopedia.
- If you were looking for the division of dubbed episodes, see season.
Seasons are a mechanic of the Pokémon games. The concept was introduced in Generation V.
Much as Generation II introduced time and days of the week to the Pokémon series, and Generation IV used the Nintendo DS's internal clock to keep track of the date of capture of a particular Pokémon, seasons are a new feature introduced in Generation V. However, seasons will not change in-game automatically; they will change only upon exiting a cave or building. Unlike in the real world, where each season lasts for approximately three sequential months, the seasons in Unova will change each month, going through the full cycle of spring, summer, autumn, and winter three times per year.
Spring occurs in January, May, and September.
Summer occurs in February, June, and October.
Autumn: as normal, the slope is too steep to climb.
Autumn occurs in March, July, and November.
Winter: due to snowfall the area uphill is now accessible.
Winter occurs in April, August, and December.
- Morning begins one hour later, at 6:00 AM, while Day lasts an hour shorter, until 6:59 PM.
- Deerling and Sawsbuck appear in their Winter Form.
- Snow is present in Twist Mountain, Icirrus City, Route 8, Moor of Icirrus, and Dragonspiral Tower; all puddles in these locations are frozen over, acting as ice tiles. Small patches of snow are also present in other locations, such as Driftveil City.
- Due to snow piling up, certain areas can be accessed that are normally inaccessible, while certain cave entrances in Twist Mountain are covered by it.
- Hail and rain are common in Driftveil City, Cold Storage, Route 5, and Mistralton City. Hail and blizzards are common in Icirrus City and Route 8.
- Some wild Pokémon encounter rates change.
- The background music on most routes changes slightly.
- Casteliacones are not sold.
- Cynthia is not in Undella Town (unless she hasn't been fought yet).
- Preschooler Winter (if the player is male) or Rich Boy Martin (if the player is female) is at the Rondez-View Ferris Wheel in Nimbasa City.BW
- Beauty December (if the player is male) or Guitarist January (if the player is female) is at the Rondez-View Ferris Wheel in Nimbasa City.BW
- The water in the Castelia Sewers is drained.
- N will battle with his winter team at N's Castle.B2W2
- As February is included among the months considered as summer, it is the shortest season on average. Where the other seasons each last a total of 92 days in a real-time year, summer lasts a total of 89 days or, in case of a leap year, 90 days.
- Interestingly, this is true for the southern hemisphere summer, as the Earth is near perihelion. Summer lasts only approximately 89 days, while winter lasts closer to 94. The opposite is in effect for the northern hemisphere.
- When summer and winter start in the northern hemisphere of the real world, the same season is in effect in-game. This is not true for spring and autumn, whereas it is spring in-game when autumn starts in real life and vice versa.
- The opposite is true for the southern hemisphere: real-world spring and autumn start in months with their respective in-game seasons, while summer and winter start in in-game winter and summer respectively.
- In some countries, most notably in North America and parts of Europe, seasons start at solstices and equinoxes, rather than starting at the first day of a month as is the case in countries like Australia. In such cases, all four seasons appear in-game in each real life season.
- Black and White, the first games to introduce this feature, were released during autumn in Japan, and the in-game season was spring. The international releases were released in what is generally considered to be spring in the northern hemisphere, and the in-game season was autumn.