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Lifestyle

Costa Rica — Living: Climate

Costa Rica's seasons run opposite on the two coasts. On the Pacific side and Central Valley, the dry season runs roughly December-April and the rainy season May-November, with Guanacaste being the driest region of the country (about 72 inches/year on the North Pacific coast) and getting little to no rain in the dry months. The Caribbean coast doesn't follow the same pattern — it's rainy nearly year-round with its driest stretch typically September-October, and it receives the country's heaviest rainfall overall (around 157 inches/year). The AI draft's single 'dry season Dec-April, rainy May-Nov' description is broadly accurate for the Pacific/Central Valley but does not hold for the Caribbean coast.

VerifiedRegional climate guides (internationalliving.com, twoweeksincostarica.com, costa-rica-guide.com) describing Pacific vs. Caribbean seasonal patterns, corroborated across multiple independent sourcesLast reviewed: 2026-08-29

Why this matters

The Caribbean coast follows an essentially inverted seasonal pattern from the rest of the country — someone planning a move based only on the commonly cited 'Dec-April dry season' would be surprised to find the Caribbean side rainy for most of the year with its driest window actually landing in September-October, which matters a lot for choosing where and when to visit or relocate.

Key facts

  • Pacific coast and Central Valley: dry season roughly December-April, rainy season roughly May-November.
  • Guanacaste (North Pacific) is the driest region in the country, averaging about 72 inches of rain per year, with minimal rain during the dry months and a rainy season that starts later (late April/May) and ends earlier (around October) than elsewhere.
  • Caribbean coast: does not follow the Pacific pattern — it is rainy for most of the year (heaviest rainfall in the country, averaging around 157 inches/year), with its driest and sunniest stretch typically in September-October, and heaviest rain November-January.
  • Elevation matters as much as coast: highland areas (e.g., the Central Valley around San José, and mountain towns) have cooler, more temperate year-round temperatures than lowland coastal areas regardless of season.

Steps

  1. Research the specific coast and elevation, not just 'Costa Rica' generally — Confirm whether the area you're considering is Pacific, Caribbean, or highland, since seasonal timing (and even which months are 'dry') differs substantially between them.

Timelines

  • Pacific coast / Central Valley dry season: Roughly December-April
  • Pacific coast / Central Valley rainy season: Roughly May-November
  • Caribbean coast driest window: Typically September-October
  • Caribbean coast heaviest rainfall: Typically November-January

Common mistakes

  • Assuming the commonly cited 'December-April dry season' applies to the Caribbean coast — it does not; the Caribbean's driest window is typically September-October
  • Assuming the climate is uniform across the country without accounting for elevation (highlands are cooler year-round than lowland coasts)

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