The climate in Catalina during October can be summarized as cool and reasonably dry.
October is in the fall / autumn in Catalina and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a cool 15°C (59°F), whilst at night 2°C (36°F) is normal.
| Daytime temperature | 14.8°C 58.6°F | 
|---|---|
| Nightly temperature | 2°C 35.6°F | 
| Average temperature | 8.4°C 47.1°F | 
| Daily sunshine | 5.6 hrs | 
| Avg rainfall | 37 mm 1.4 ins | 
| Rainy days | 8 days | 
| Sea temperature | 17.4°C 63.3°F | 
| Humidity | 81% | 
| Windspeed | 7.6kph 5 mph | 
On average October is the 5th driest month of the year in Catalina with around 37mm 1.4 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.6 hours of sunshine per day.
				
						
						The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Catalina in October 2025.
Best places to visit in October
| Hottest month: | July | 23.8°C 74.8°F | 
|---|---|---|
| Driest month: | February | 31mm 1.2ins | 
| Sunniest month: | August | 8.3hrs | 
| Coldest month: | January | -1°C 30.2°F | 
| Wettest month: | June | 98mm 3.9ins |