Climate Insights for San José

The climate in San José is warm and mild. The average annual temperature is 21°C and approximately 2,789 mm of precipitation falls per year. October is the wettest month, receiving around 538 mm of rainfall. San José is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, March, May. The coldest months are February, January, March, when temperatures can drop to 17°C.The climate in San José is warm and mild. The average annual temperature is 69°F and approximately 109.8 in of precipitation falls per year. October is the wettest month, receiving around 21.2 in of rainfall. San José is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, March, May. The coldest months are February, January, March, when temperatures can drop to 62°F.

San José has relatively stable temperatures year-round, staying within a 9°C range. The warmest month is April, when average highs reach 26°C and the mean temperature sits around 21°C. February is the coolest month, with minimum temperatures around 17°C and an average of 20°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows.San José has relatively stable temperatures year-round, staying within a 17°F range. The warmest month is April, when average highs reach 79°F and the mean temperature sits around 70°F. February is the coolest month, with minimum temperatures around 62°F and an average of 69°F. Daily temperature variation is modest, with an average difference of 13°F between highs and lows.

San José is a very wet location, receiving approximately 2,789 mm of precipitation annually, which averages out to around 232 mm per month. The wettest month is October, averaging 538 mm of rainfall. September and June also tend to see above-average precipitation. The driest month is February, with just 17 mm. That's 521 mm less than October, 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 very wet location, receiving approximately 109.8 in of precipitation annually, which averages out to around 9.1 in per month. The wettest month is October, averaging 21.2 in of rainfall. September and June also tend to see above-average precipitation. The driest month is February, with just 0.7 in. That's 20.5 in less than October, 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 6km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 9km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 5km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 8km/h in winter, 6km/h in spring, 5km/h in summer, 4km/h in autumn.San José is relatively calm, with an average annual wind speed of 4mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is February, averaging 6mph, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 2mph, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 4mph difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 5mph in winter, 4mph in spring, 3mph in summer, 3mph in autumn.

The best time to visit San José is during January, February, March, April and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 42 mm per month. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.The best time to visit San José is during January, February, March, April and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 69°F with modest rainfall averaging 1.7 in per month. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

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.