San José Weather and Climate: A Comprehensive Guide
San José has a steady warm climate throughout the year.
It also has a notably wet climate with much precipitation.
Now, let’s break down all the climate details for a clearer picture.
Average maximum day and minimum night temperature
The climate in San José remains fairly constant, offering comfortable temperatures throughout the year. Average maximum daytime temperatures range from a comfortable 26°C in April, the warmest time of the year, to a comfortable 24°C during cooler months like January.
At night, temperatures typically drop to an average of around 15°C during these months. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
San José is known for its substantial rainfall, with annual precipitation reaching 3381 mm. Significant seasonal changes in precipitation occur throughout the year. During the wetter season, October receives heavy rainfall, averaging 490 mm of precipitation, recorded across 23 rainy days. In contrast, the drier season, March brings less rainfall, with 61 mm over 8 rainy days. For more details, please visit our San José Precipitation page.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Seasonal changes in sunshine hours are quite dramatic in San José. While March receives considerable daily sunshine with up to 9.5 hours, June marks the darkest time of the year, where sunshine is scarce with only 4.8 hours of sunlight per day. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Average humidity
The relative humidity is high throughout the year in San José.
The city experiences its highest humidity in October, reaching 87%. In March, the humidity drops to its lowest level at 66%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
partly cloudy and chance of slight rain partly cloudy and chance of rain broken clouds and no rainForecast for San José
8 m/s
6 m/s
8 m/s
Select a Month of Interest
Check the conditions for any month of the year.
The best time of year to visit San José in Costa Rica
Other facts from our historical weather data:April has an average maximum temperature of 26°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 24°C.
October tops the wettest month list with 490 mm of rainfall.
March is the driest month with 61 mm of precipitation.
March is the sunniest month with an average of 284 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
