Climate of San Ramon

The temperatures tend to be very mild year-round despite the low latitude position of San Ramón, : 21-27 C (70-80 F). This is largely due to the city's altitude of 1,057 m (3,470 ft) above sea level. June through October is considered the rainy or "Green" season with November to May considered the "dry season." Diurnal periods are very predictable due to Costa Rica's low North latitude: The sun rises in San Ramon by about 05:45 and sets at 18:30 with very little variation throughout the year. This regular cycle is further evident in the precipitation patterns, particularly during the rainy season. As the morning sun rises, air which is already moist due to a certain amount of orographic lift being added by the Pacific Ocean, is further loaded by evapotranspiration wherein water drawn from the ground by plants and trees is transpired into the atmosphere. This leads to a relatively consistent pattern of mostly dry mornings followed by rains in the afternoon, usually beginning around 14:00. Rains can last for a short period, or for several hours, and there is a seemingly equal chance that there will either be a downpour or a drizzle. Evenings can be cooler than one might expect due to altitude, and cooler still in the evenings following a rain event.