Climate Overview
The climate in Juan José Castelli is warm and mild. The average annual temperature is 24°C and approximately 266mm of precipitation falls per year. October is the wettest month, receiving around 33mm of rainfall. Juan José Castelli 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: August, July, September. The coldest months are December, November, March, when temperatures can drop to 22°C.
Temperature
Juan José Castelli has relatively stable temperatures year-round, staying within a 4°C range. The warmest month is August, when average highs reach 26°C and the mean temperature sits around 25°C. December is the coolest month, with minimum temperatures around 22°C and an average of 22°C. Daily temperature variation is modest, with an average difference of 1°C between highs and lows.
Precipitation
Juan José Castelli is a quite dry location, receiving approximately 266mm of precipitation annually, which averages out to around 22mm per month. The wettest month is April, averaging 33mm of rainfall. July and August also tend to see above-average precipitation. The driest month is November, with just 7mm. That's 25mm less than April, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.
Wind
Juan José Castelli 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 September, averaging 7km/h, though still comfortable for most outdoor activities. The calmest conditions occur in December, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 3km/h gap between the calmest and windiest months.
Seasons
16 days until Spring
It is currently winter in Juan José Castelli, which began on June 21, 2026. Juan José Castelli is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in August at around 26°C, while the coldest stretch bottoms out in December near 22°C. Spring is next, beginning on September 23, 2026 — 16 days from now.
Spring
Temperatures range from 22 to 25°C. Rainfall is relatively light, with around 73mm over the season and a monthly average of 24mm. Winds are generally light, averaging 6km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 22 to 25°C. Rainfall is relatively light, with around 49mm over the season and a monthly average of 16mm. Winds are generally light, averaging 5km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 22 to 24°C. Rainfall is relatively light, with around 69mm over the season and a monthly average of 23mm. Winds are generally light, averaging 6km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from 23 to 26°C. Rainfall is relatively light, with around 75mm over the season and a monthly average of 25mm. Winds are generally light, averaging 6km/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 Juan José Castelli is during January, February, March, April, May, June, July, August, September, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 22mm per month. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.
Monthly Climate Data
The table below shows monthly climate averages for Juan José Castelli 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.
