Climate Insights for Unión
Gobernador Dupuy, San Luis, Argentina
Climate Overview
The climate in Unión is temperate. The average annual temperature is 18°C and approximately 503 mm of precipitation falls per year. January is the wettest month, receiving around 72 mm of rainfall. Unión 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, February, December. The coldest months are July, June, August, when temperatures can drop to 3°C.The climate in Unión is temperate. The average annual temperature is 64°F and approximately 19.8 in of precipitation falls per year. January is the wettest month, receiving around 2.8 in of rainfall. Unión 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, February, December. The coldest months are July, June, August, when temperatures can drop to 38°F.
Temperature
Temperatures in Unión vary considerably across the year, with a 30°C difference between the coldest and warmest months. The warmest month is January, when average highs reach 33°C and the mean temperature sits around 26°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 March and April, with a 5°C shift in average temperatures.Temperatures in Unión vary considerably across the year, with a 54°F difference between the coldest and warmest months. The warmest month is January, when average highs reach 92°F and the mean temperature sits around 79°F. July is the coolest month, with minimum temperatures around 38°F and an average of 48°F. On average, daily temperatures fluctuate by about 24°F between overnight lows and afternoon highs. The sharpest temperature change occurs between March and April, with a 8°F shift in average temperatures.
Precipitation
Unión is a relatively dry area, receiving approximately 503 mm of precipitation annually, which averages out to around 42 mm per month. The wettest month is January, averaging 72 mm of rainfall. October and March also tend to see above-average precipitation. The driest month is July, with just 12 mm. That's 60 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.Unión is a relatively dry area, receiving approximately 19.8 in of precipitation annually, which averages out to around 1.7 in per month. The wettest month is January, averaging 2.8 in of rainfall. October and March also tend to see above-average precipitation. The driest month is July, with just 0.5 in. That's 2.4 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.
Wind
Unión is mildly breezy, with an average annual wind speed of 15km/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 17km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 13km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 14km/h in winter, 17km/h in spring, 16km/h in summer, 14km/h in autumn.Unión is moderately windy, with an average annual wind speed of 10mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is November, averaging 11mph, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in June, with average winds dropping to 8mph, 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. Wind tends to pick up during the summer months. The seasonal averages are 9mph in winter, 11mph in spring, 10mph in summer, 9mph in autumn.
Best Time to Visit
The best time to visit Unión is during March, April, September, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 52 mm per month. By contrast, January can be uncomfortably hot with highs reaching 33°C, while July is the coldest period with lows dropping to 3°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.The best time to visit Unión is during March, April, September, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 67°F with modest rainfall averaging 2 in per month. By contrast, January can be uncomfortably hot with highs reaching 92°F, while July is the coldest period with lows dropping to 38°F. 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 Unión 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 Unión 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.