Climate Insights for Castro

The climate in Castro is temperate. The average annual temperature is 11°C and approximately 1410mm of precipitation falls per year. Castro receives a notable amount of rainfall throughout the year, including during its driest month. Castro 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: February, January, December. The coldest months are July, June, September, when temperatures can drop to 4°C.

Castro sees moderate temperature variation throughout the year, ranging from 4°C to 21°C. February is the warmest month, though highs remain moderate at 21°C with a mean of 15°C. July is the coolest month, with minimum temperatures around 4°C and an average of 7°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between March and April, with a 2°C shift in average temperatures.

Castro is a fairly wet location, receiving approximately 1410mm of precipitation annually, which averages out to around 117mm per month. The wettest month is August, averaging 197mm of rainfall. June and July also tend to see above-average precipitation. The driest month is February, with just 38mm. That's 159mm less than August, 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.

Castro 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 August, averaging 17km/h, though still comfortable for most outdoor activities. The calmest conditions occur in January, with average winds dropping to 14km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 17km/h in winter, 15km/h in spring, 14km/h in summer, 14km/h in autumn.

It is currently autumn in Castro, which began on March 20, 2026. Castro 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 February at around 21°C, while the coldest stretch bottoms out in July near 4°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Castro is during February, when the weather is most comfortable for travellers. During these months, average temperatures hover around 15°C with modest rainfall averaging 38mm per month. By contrast, July can be quite cold with temperatures dropping to 4°C. 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 Castro 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.