Average Weather in October in San José Costa Rica. Daily high temperatures are around 77°F, rarely falling below 73°F or exceeding 80°F. The lowest daily average high temperature is 76°F on October 26. Daily low temperatures are around 63°F, rarely falling below 61°F or exceeding 66°F.Click to see full answer. Simply so, is October a good time to go to Costa Rica?Visit Costa Rica’s Caribbean coast in October and you’ll enjoy beautiful weather and limited crowds. This is one of the best months to visit terrific destinations like Tortuguero National Park and Puerto Viejo. October means the depths of the rainy season. That said, the amount of rain varies significantly by location.Subsequently, question is, does it rain all day in Costa Rica in October? What it’s like to travel Costa Rica in October: This is the driest month for the Caribbean side but the worst for the rest of the country. Expect sudden rain storms during the day and it may rain late into the night. On the Pacific coast you will still get dry but cloudy mornings but by afternoon, it’ll start raining. In respect to this, what is the average temperature in Costa Rica in October? Temperatures across the country are about as low as they ever get which means averages around 80 °F (27 °C) with lows overnight about 68 to 76 °F (20-24 °C). Up in elevation by San José temperatures average 75 to 85 °F (24-29 °C) during the day.What’s the best time of year to go to Costa Rica?Best Times to Visit Costa Rica. The best time to visit Costa Rica is from mid-December to April (the dry season). This peak tourist season boasts plenty of sunshine making it an ideal time for exploring rainforests and lounging on beaches. That said, the dry season is the most popular (and expensive) time to visit.