Climate Insights for San José

The climate in San José is warm and mild. The average annual temperature is 19°C and approximately 283 mm of precipitation falls per year. January is the wettest month, receiving around 80 mm of rainfall. San José is in the Southern Hemisphere. The seasons are reversed: summer runs from December to February, while winter falls between June and August. The summer months are: January, December, February. The coldest months are July, June, August, when temperatures can drop to 3°C.The climate in San José is warm and mild. The average annual temperature is 66°F and approximately 11.2 in of precipitation falls per year. January is the wettest month, receiving around 3.2 in of rainfall. San José is in the Southern Hemisphere. The seasons are reversed: summer runs from December to February, while winter falls between June and August. The summer months are: January, December, February. The coldest months are July, June, August, when temperatures can drop to 37°F.

Temperatures in San José vary considerably across the year, with a 31°C difference between the coldest and warmest months. The warmest month is January, when average highs reach 34°C and the mean temperature sits around 28°C. July is the coolest month, with minimum temperatures around 3°C and an average of 9°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 5°C shift in average temperatures.Temperatures in San José vary considerably across the year, with a 57°F difference between the coldest and warmest months. The warmest month is January, when average highs reach 94°F and the mean temperature sits around 82°F. July is the coolest month, with minimum temperatures around 37°F and an average of 47°F. On average, daily temperatures fluctuate by about 24°F between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 9°F shift in average temperatures.

San José is a quite dry location, receiving approximately 283 mm of precipitation annually, which averages out to around 24 mm per month. The wettest month is January, averaging 80 mm of rainfall. February and March also tend to see above-average precipitation. The driest month is July, with just 3 mm. That's 77 mm less than January, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.San José is a quite dry location, receiving approximately 11.2 in of precipitation annually, which averages out to around 0.9 in per month. The wettest month is January, averaging 3.1 in of rainfall. February and March also tend to see above-average precipitation. The driest month is July, with just 0.1 in. That's 3 in less than January, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

San José is relatively calm, with an average annual wind speed of 10km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 12km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months.San José is mildly breezy, with an average annual wind speed of 6mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is October, averaging 8mph, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in June, with average winds dropping to 5mph, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3mph between the calmest and windiest months.

The best time to visit San José is during March, April, September, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 20 mm per month. By contrast, January can be uncomfortably hot with highs reaching 34°C, while July is the coldest period with lows dropping to 3°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.The best time to visit San José is during March, April, September, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 69°F with modest rainfall averaging 0.8 in per month. By contrast, January can be uncomfortably hot with highs reaching 94°F, while July is the coldest period with lows dropping to 37°F. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for San José based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.The table below shows monthly climate averages for San José based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Fahrenheit (°F). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in miles per hour (mph). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.