Detailed weather for San José with a 5 to 10 day forecast, giving a look further ahead. San José ; Costa Rica ; Pressure. Forecast; Observations. Forecast. Find the most current and reliable 7 day weather forecasts, storm alerts, reports and information for San José, CR with The Weather Network. San Jose, Costa Rica, 0, 77 °F, Mostly Cloudy, 83%, in, SSW at 6 mph, 2: 00 PM CST. San Jose, Costa Rica, 0, °F, 93%, in, Calm, PM CST. San Jose Highlands, December to April, May to November In general the weather can be classified as a dry or high season and a wet or green season. Be prepared with the most accurate day forecast for San Jose, Costa Rica with highs, lows, chance of precipitation from The Weather Channel and. Get the San Jose weather forecast. Access hourly, 10 day and 15 day forecasts along with up to the minute reports and videos for San Jose, Costa Rica from Extended · San Jose April Weather · San Jose Hourly Weather · Month Outlook.