Climate Overview
The climate in San Germán is hot. The average annual temperature is 27°C and approximately 796mm of precipitation falls per year. May is the wettest month, receiving around 166mm of rainfall. San Germán is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are January, February, March, when temperatures can drop to 21°C.
Temperature
San Germán sees moderate temperature variation throughout the year, ranging from 21°C to 34°C. The warmest month is August, when average highs reach 34°C and the mean temperature sits around 29°C. January is the coolest month, with minimum temperatures around 21°C and an average of 25°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs.
Precipitation
San Germán is a relatively dry area, receiving approximately 796mm of precipitation annually, which averages out to around 66mm per month. The wettest month is May, averaging 166mm of rainfall. September and October also tend to see above-average precipitation. The driest month is February, with just 18mm. That's 148mm less than May, 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.
Wind
San Germán is relatively calm, with an average annual wind speed of 3km/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 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.
Seasons
93 days until Autumn
It is currently summer in San Germán, which began on June 21, 2026. San Germán is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 34°C, while the coldest stretch bottoms out in January near 21°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.
Spring
Temperatures range from 21 to 32°C. Precipitation is moderate at around 246mm for the season, averaging 82mm per month. Winds are generally light, averaging 3km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 24 to 34°C. Precipitation is moderate at around 208mm for the season, averaging 69mm per month. Winds are generally light, averaging 2km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 23 to 33°C. Precipitation is moderate at around 271mm for the season, averaging 90mm per month. Winds are generally light, averaging 2km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 21 to 30°C. Rainfall is relatively light, with around 71mm over the season and a monthly average of 24mm. Winds are generally light, averaging 3km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit San Germán is during January, when the weather is most comfortable for travellers. During these months, average temperatures hover around 25°C with modest rainfall averaging 30mm per month. By contrast, August can be uncomfortably hot with temperatures reaching 34°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.
Monthly Climate Data
The table below shows monthly climate averages for San Germán 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.
