Climate Insights for Castroville

The climate in Castroville is warm and mild. The average annual temperature is 21°C and approximately 710mm of precipitation falls per year. Castroville receives a notable amount of rainfall throughout the year, including during its driest month. Castroville is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: Agosto, Luglio, Giugno. The coldest months are Gennaio, Febbraio, Dicembre, when temperatures can drop to 6°C.

Temperatures in Castroville vary considerably across the year, with a 30°C difference between the coldest and warmest months. Agosto is the hottest month, with daytime highs reaching 36°C and an average of 30°C. Gennaio is the coolest month, with minimum temperatures around 6°C and an average of 11°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 6°C shift in average temperatures.

Castroville is a relatively dry area, receiving approximately 710mm of precipitation annually, which averages out to around 59mm per month. The wettest month is May, averaging 117mm of rainfall. April and September also tend to see above-average precipitation. The driest month is February, with just 38mm. That's 79mm less than May, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Castroville is mildly breezy, with an average annual wind speed of 17km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 20km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 15km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h between the calmest and windiest months.

It is currently spring in Castroville, which began on March 20, 2026. Castroville 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 Agosto at around 36°C, while the coldest stretch bottoms out in Gennaio near 6°C. Summer is next, beginning on June 21, 2026 — 92 days from now.

The best time to visit Castroville is during Marzo, Aprile, Ottobre and Novembre, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 62mm per month. By contrast, Agosto can be uncomfortably hot with highs reaching 36°C, while Gennaio is the coldest period with lows dropping to 6°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 Castroville 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.