September Costa Rica: Wettest month (75-85°F), intense rain, maximum solitude. 40-45% savings, Caribbean only real option, for rain lovers, deepest authenticity.

August Costa Rica: Deep green season (75-88°F), daily rain, peak lushness. 35-40% savings, minimal tourists, exceptional wildlife, Caribbean coast best.

July Costa Rica: Veranillo mini-summer (75-88°F), improved weather mid-green season. 25-30% savings, more sunshine, excellent conditions, moderate crowds.

June Costa Rica: Full green season (75-85°F), daily afternoon rain, impossibly lush. 35-40% savings, Caribbean coast best, profound solitude, authentic rainforest.

May Costa Rica: Green season begins (75-90°F), lush transformation, excellent value. 30-35% savings, afternoon rains, peak wildlife, minimal crowds.

April Costa Rica: Dry to green transition (75-92°F), improving weather, decreasing crowds. 15-20% savings, morning sun with afternoon clouds, nature awakening.

March Costa Rica: Hottest month (75-95°F), spring break crowds, dry season ending. Peak heat requires strategy, excellent wildlife, mountain retreats appealing.

February Costa Rica: Prime dry season (75-90°F), settled post-holiday atmosphere, exceptional conditions. 15-20% below January, moderate crowds, reliable programming.

January Costa Rica: Peak dry season (75-90°F), Reyes celebration, excellent wildlife viewing. 40-50% savings post-holidays, comfortable crowds, reliable sunshine.

December Costa Rica: Dry season returns (75-90°F), split month dynamics. Early December value, Christmas/NY premium 30-40% above peak, advance booking essential.

November Costa Rica: Transition improving (75-88°F), decreasing rain, both coasts viable. 20-30% savings, conditions improving daily, Thanksgiving surge, strategic timing.