weather in catalina in april
Guide to Santa Catalina weather in April. The average maximum daytime temperature in Santa Catalina in April is a hot 31Â°C (88Â°F) with very high heat & humidity. The average night-time temperature is usually a warm 24Â°C (75Â°F). There are usually 7 hours of bright sunshine each day, which represents 54% of the 12 hours of daylight.