Climate Insights for San José

The climate in San José is warm and mild. The average annual temperature is 22°C and approximately 634 mm of precipitation falls per year. January is the wettest month, receiving around 128 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 6°C.The climate in San José is warm and mild. The average annual temperature is 71°F and approximately 25 in of precipitation falls per year. January is the wettest month, receiving around 5 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 42°F.

Temperatures in San José vary considerably across the year, with a 30°C difference between the coldest and warmest months. January is the hottest month, with daytime highs reaching 36°C and an average of 29°C. July is the coolest month, with minimum temperatures around 6°C and an average of 12°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 54°F difference between the coldest and warmest months. January is the hottest month, with daytime highs reaching 96°F and an average of 84°F. July is the coolest month, with minimum temperatures around 42°F and an average of 54°F. On average, daily temperatures fluctuate by about 23°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 relatively dry area, receiving approximately 634 mm of precipitation annually, which averages out to around 53 mm per month. The wettest month is January, averaging 128 mm of rainfall. December and March also tend to see above-average precipitation. The driest month is August, with just 5 mm. That's 123 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 relatively dry area, receiving approximately 25 in of precipitation annually, which averages out to around 2.1 in per month. The wettest month is January, averaging 5 in of rainfall. December and March also tend to see above-average precipitation. The driest month is August, with just 0.2 in. That's 4.8 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 11km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is November, averaging 16km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 8km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 8km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to pick up during the summer months. The seasonal averages are 8km/h in winter, 14km/h in spring, 14km/h in summer, 10km/h in autumn.San José is mildly breezy, with an average annual wind speed of 7mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is November, averaging 10mph, 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 speeds vary significantly across the year, with a 5mph difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to pick up during the summer months. The seasonal averages are 5mph in winter, 9mph in spring, 8mph in summer, 6mph in autumn.

The best time to visit San José is during April, May, August, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 26 mm per month. By contrast, January can be uncomfortably hot with highs reaching 36°C, while July is the coldest period with lows dropping to 6°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.The best time to visit San José is during April, May, August, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 67°F with modest rainfall averaging 1 in per month. By contrast, January can be uncomfortably hot with highs reaching 96°F, while July is the coldest period with lows dropping to 42°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.