Last updated: June 24, 2025
In October, the average temperature in Fountain Valley, United States is a pleasant 20°C (69°F). Visitors can expect a minimum temperature of 11°C (52°F) and a maximum reaching up to 38°C (101°F). With an average humidity of 67%, the weather is generally comfortable, though be prepared for brief showers, as precipitation amounts to 9 mm (0.4 in) over 2 days.
In October in Fountain Valley, the average temperature is 20°C (69°F). Maximums can reach 38°C (101°F), and minimums can be as low as 11°C (52°F). This makes Fountain Valley an ideal destination for travelers seeking a warm climate while still having cooler nights to enjoy outdoor activities.
In Fountain Valley in October, the precipitation amount is 9 mm (0.4 in) over the course of 2 days.
In Fountain Valley in October, humidity is 67%. With an average temperature of 20°C (69°F), this humidity feels like a warm, gentle embrace that clings to your skin, creating a comfortable yet slightly sticky atmosphere that can be refreshing while exploring the sights, provided you stay hydrated and take breaks in the shade.
In Fountain Valley in October, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Fountain Valley.
UV Risk Categories
Weather in Fountain Valley varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Fountain Valley, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 14°C (57°F) | 65 mm (2.5 inches) | 74% | moderate |
February Weather | 14°C (58°F) | 52 mm (2.0 inches) | 79% | high |
March Weather | 15°C (60°F) | 55 mm (2.2 inches) | 75% | very high |
April Weather | 17°C (63°F) | 23 mm (0.9 inches) | 70% | very high |
May Weather | 18°C (64°F) | 12 mm (0.5 inches) | 70% | very high |
June Weather | 20°C (68°F) | 4 mm (0.2 inches) | 72% | extreme |
July Weather | 22°C (72°F) | 3 mm (0.1 inches) | 73% | extreme |
August Weather | 23°C (73°F) | 2 mm (0.1 inches) | 69% | very high |
September Weather | 22°C (72°F) | 3 mm (0.1 inches) | 68% | very high |
October Weather | 20°C (69°F) | 9 mm (0.4 inches) | 67% | high |
November Weather | 17°C (63°F) | 18 mm (0.7 inches) | 68% | moderate |
December Weather | 14°C (58°F) | 68 mm (2.7 inches) | 71% | moderate |