All 7 seasons of Avatar are.

• Water is cooly colored. Technically it’s summer/winter, depending on the hemisphere, but very cold, stormy, and ‘cozy’ feeling.

• Earth takes place in spring and is more colorful and earthy. Characters are getting their footing.

• Fire Takes place in the summer and is hot/tropical. Very… fiery.

• Air Has late fall vibes. Urban noir mood with colored trees turning fall colors, then snow blanketing the city.

• Spirits is solidly winter, pretty much all in snow and kinda bleak/magical, except for the hint of spring at the end.

• Change is spring. Energy is coming back to the characters, it’s bright out. Trees are green, but there’s a lot of vivid rocky/sandy terrain.

• Balance, is well, out of balance and probably the least seasonal, but I think that’s the point. The protag’s scenes are more unsaturated and dark, and it feels like a turbulent summer elsewhere.

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Aside from that:

• Bloodlines smells like the Florida wet season. Speaking from experience, there are only two seasons in Florda.

• The Fallout TV show (at least season 1) feels whimiscally summery.

• Eureka diabetically and hilariously summery

• Batman: TAS, some other DCAU, and Samurai Jack are incredibly stylized and seasonal feeling, but its more per episode.