Guanacaste in June

When to go

June falls in the first rainy period that Costa Rica's national meteorological institute describes for the Pacífico Norte region, which includes Guanacaste, and the same summary places the first rainfall maximum in June. The National Hurricane Center's eastern Pacific season has already started, and the basin it describes reaches Central America. SINAC's page for Rincón de la Vieja National Park says sunny mornings and afternoons with precipitation are usual in the rainy season, so plan outdoor visits for the morning.

Trip facts

• The WMO's World Weather Information Service lists, for Liberia, Costa Rica, a mean daily maximum temperature of 32.1 °C (89.8 °F) and a mean daily minimum temperature of 23.1 °C (73.6 °F) in June, from the Instituto Meteorológico Nacional and based on monthly averages for 1973–2003. (worldweather.wmo.int, checked 2026-10-15)
• The WMO's World Weather Information Service lists, for Liberia, Costa Rica, a mean total precipitation of 247.1 mm in June (monthly averages for 1971–2003) and a mean of 16.7 precipitation days, from the Instituto Meteorológico Nacional. (worldweather.wmo.int, checked 2026-10-15)
• The Instituto Meteorológico Nacional's climate summary for the Pacífico Norte region, which includes the province of Guanacaste (1961–1990 data), says the first rainy period runs between May and August, when 50% of the total falls, and that the first rainfall maximum occurs in June as the southwest winds intensify, causing local storms and heavy downpours. (www.imn.ac.cr, checked 2026-10-15)
• The National Hurricane Center says the eastern Pacific hurricane season runs from May 15 to November 30, and that the eastern Pacific basin extends from Mexico and Central America westward to 140°W. (www.nhc.noaa.gov, checked 2026-10-15)
• SINAC (Sistema Nacional de Áreas de Conservación) says on its Rincón de la Vieja National Park page that the rainy season runs from May to November and usually brings sunny mornings and afternoons with precipitation, so tours are recommended in the morning during these months. (www.sinac.go.cr, checked 2026-10-15)
• SINAC says that during the rainy season (May–November) access to the waterfalls trail (Sendero de las Cataratas) at Rincón de la Vieja National Park may be regulated by the sector's administration. (www.sinac.go.cr, checked 2026-10-15)
• SINAC says the arribadas (mass sea turtle nesting) at Ostional National Wildlife Refuge occur all year, once or twice a month, and that during them entry must be accompanied by a local tourism guide. (www.sinac.go.cr, checked 2026-10-15)
• The Costa Rica Tourism Board's Guanacaste page says there are two commercial centers in the northern area, Liberia and Santa Cruz, which are linked with five important tourism development centers: Papagayo, El Coco, Flamingo, Conchal, and Tamarindo. (www.visitcostarica.com, checked 2026-10-15)
• The Costa Rica Tourism Board's Guanacaste page says the region relies on the Daniel Oduber International Airport, through which arrive a number of charter and commercial flights from the United States. (www.visitcostarica.com, checked 2026-10-15)
• The Costa Rica Tourism Board's FAQ answers 'Do I need a visa to visit Costa Rica?' by saying that, depending on your country of origin, you may enter Costa Rica without a visa, and that citizens of the USA, Canada and most European countries enjoy this privilege. (www.visitcostarica.com, checked 2026-10-15)