Average Weather in Stephenville Texas, United States. In Stephenville, the summers are hot and muggy, the winters are cold and windy, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 35Â°F to 94Â°F and is rarely below 23Â°F or above 100Â°F.
Due to the moderating effect of the ocean, temperatures are cooler than more inland areas of Orange County, where temperatures frequently exceed 90 Â°F (32 Â°C) and occasionally reach 100 Â°F (38 Â°C). The period of November through March is somewhat rainy, as shown in the table to right.
Weather in California in August. The average maximum daytime temperature in California in August is a hot 30Â°C (86Â°F) with moderate heat & humidity. There are usually 11 hours of bright sunshine each day, which represents 83% of the 13 hours of daylight. Expect 4mm (0.2 inches) of rainfall across the whole of August with 1 day with some rain falling.