- This article is about the game mechanic. For the division of dubbed episodes in the anime, see season.
Seasons (Japanese: 季節 season) are a mechanic from the fifth generation of the Pokémon games.
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 (in the astronomical model) or exactly three sequential months (in the meteorological model), the seasons in Unova will change each month, going through the full cycle of spring, summer, autumn, and winter three times per year.
In Generation V
Spring (Japanese: 春 spring) occurs in January, May, and September.
Summer (Japanese: 夏 summer) occurs in February, June, and October.
Autumn: as normal, the slope is too steep to climb.
Autumn (Japanese: 秋 autumn), also known as fall in North America, occurs in March, July, and November.
Winter: due to snowfall the area uphill is now accessible.
Winter (Japanese: 冬 winter) occurs in April, August, and December.
- Morning begins at 7:00 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.BW
- 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.B2W2
- The water in the Castelia Sewers is drained.B2W2
- N will battle with his winter team at N's Castle.B2W2
- Because February is included among the months considered as summer in the games, summer is the shortest season on average. Whereas the other seasons each last a total of 92 days in a real-time year, summer lasts for a total of 89 days, or 90 days in case of a leap year. In the real world, this is true for astronomical summer in the southern hemisphere, as the Earth is near perihelion; astronomical 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: 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 the astronomical model of seasons (used in North America and parts of Europe), seasons start at solstices and equinoxes. In the game, seasons start at the start of the month, as is the case in the meteorological model of seasons (used by meteorologists and in countries such as Australia).
- Pokémon 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 during spring in the Northern Hemisphere, and the in-game season was autumn.
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